WO2015039136A2 - System for regulating pressure differentials on a fluid - Google Patents
System for regulating pressure differentials on a fluid Download PDFInfo
- Publication number
- WO2015039136A2 WO2015039136A2 PCT/US2014/055950 US2014055950W WO2015039136A2 WO 2015039136 A2 WO2015039136 A2 WO 2015039136A2 US 2014055950 W US2014055950 W US 2014055950W WO 2015039136 A2 WO2015039136 A2 WO 2015039136A2
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- WO
- WIPO (PCT)
- Prior art keywords
- pressure
- valving
- opening
- closing
- chamber
- Prior art date
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 51
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 10
- 230000004913 activation Effects 0.000 claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims description 22
- 238000011144 upstream manufacturing Methods 0.000 claims description 11
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 claims 4
- 238000007789 sealing Methods 0.000 claims 4
- 230000008901 benefit Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012552 review Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/01—Control of flow without auxiliary power
- G05D7/0106—Control of flow without auxiliary power the sensing element being a flexible member, e.g. bellows, diaphragm, capsule
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/04—Control of fluid pressure without auxiliary power
- G05D16/10—Control of fluid pressure without auxiliary power the sensing element being a piston or plunger
- G05D16/103—Control of fluid pressure without auxiliary power the sensing element being a piston or plunger the sensing element placed between the inlet and outlet
- G05D16/106—Sleeve-like sensing elements; Sensing elements surrounded by the flow path
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/128—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like servo actuated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
- F24D19/1036—Having differential pressure measurement facilities
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/028—Controlling a pressure difference
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/04—Control of fluid pressure without auxiliary power
- G05D16/0404—Control of fluid pressure without auxiliary power with two or more controllers mounted in parallel
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/14—Control of fluid pressure with auxiliary non-electric power
- G05D16/16—Control of fluid pressure with auxiliary non-electric power derived from the controlled fluid
- G05D16/166—Control of fluid pressure with auxiliary non-electric power derived from the controlled fluid using pistons within the main valve
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
- G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
- G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
- G05D16/204—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means the plurality of throttling means being arranged in parallel
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
- G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
- G05D7/0641—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means using a plurality of throttling means
- G05D7/0652—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means using a plurality of throttling means the plurality of throttling means being arranged in parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/02—Fluid distribution means
- F24D2220/0264—Hydraulic balancing valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/2496—Self-proportioning or correlating systems
- Y10T137/2559—Self-controlled branched flow systems
- Y10T137/2562—Dividing and recombining
Definitions
- This disclosure is generally directed to va systems. More specifically, this disclosure is directed systems for regulating pressure differentials on a fluid.
- a variety of different heat transfer systems use water or other fluids to transfer heat or thermal energy between one or more production units and one or more loads . Such systems are often referred to as hydronic systems.
- This disclosure provides a system that regulates pressure differentials on a fluid.
- a system for regulating a pressure differential includes a plurality of valving elements and a valve activation system.
- Each of the plurality of valving elements are configured to selectively allow and restrict at least a portion of a flow of fluid between an inlet and an outlet of a conduit through a respective opening and closing of each respective valving element.
- the valve activation system is configured to supply a common driving pressure to the plurality of valving elements.
- the common driving pressure is configured to initiate at least one of the opening or closing of the plurality of valving elements or to initiate the other of the opening or closing of the plurality of valving elements.
- Certain embodiments may provide various technical advantages depending on the implementation. For example, a technical advantage of some embodiments may include using several valving elements in parallel that have less stroke than a single valving element with a similar area provided by the several parallel elements. A technical advantage of other embodiments may include the capability to have valving elements that are easy to machine as compared to large valves . Yet another technical advantage may include the capability to have larger valve sizing using a plurality of valving elements that together function as the larger valve.
- FIGURE 1 illustrates basic components of a valve system, according to an embodiment of the disclosure
- FIGURE 2A shows a balanced state of a valve system, according to an embodiment of the disclosure ;
- FIGURE 2B is a blow-up of the dashed portion in
- FIGURE 2A showing the details of the valve activation system, according to an embodiment of the disclosure
- FIGURE 2C shows the valve system of FIGURE 2A in a valve opening state, according to an embodiment of the disclosure ,-
- FIGURE 2D shows the valve system of FIGURE 2A in a valve closing state, according to an embodiment of the disclosure.
- FIGURES 3A and 3B illustrates yet another configuration of a valve system, according to an embodiment of the disclosure.
- FIGURES described below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure invention may be implemented in any type of suitably arranged device or system.
- FIGURE 1 illustrates basic components of a valve system 100, according to an embodiment of the disclosure.
- a valve system 100 is generally shown as a mechanism that controls flow (as generally indicated by line 185) between an inlet 110 and an outlet 190 in a conduit 105. By regulating the flow between the inlet 110 and the outlet 190, pressure or a pressure differential may be regulated.
- the valve system 100 may be used in virtually any setting, controlling the volume of fluid flowing therethrough. In particular embodiments, the valve system 100 may be used in a hydronic heating or cooling system.
- the valve system 100 in this particular embodiment includes a valve activation system 120, a valving element 160, a connection to a pressure (generally indicated by line 125) elsewhere in the system, and fluid lines 130, 140, and 150.
- the valve system 100 has been simplified for purpose of brevity in illustration and may include more, less, or different components as will become apparent to one of ordinary skill in the art after review of the disclosure.
- the valving element 160 include at least a plunger 164 and a chamber 168. In particular configurations, the valving element may be considered a so-called "cartridge.” Although only one valving element 160 is shown in this configuration, other configurations that will be described below may include more valving elements that collectively control a flow rate.
- the valving element 160 is generally configured to restrict or allow the passage of fluid between the inlet 110 and the outlet 190. By restricting passage (or possibly even eliminating passage) of fluid between the inlet 110 and the outlet 190, pressure is increased. A certain pressure or pressure differential may be desired. For example, in particular configurations, a pressure differential across a load may be desired. The valving element 160 through modification of the flow rate allow such a pressure differential to be maintained as will be described in further details below.
- the conduit 105 may have features therein that interact with the valving element 160 in order to selectively restrict or allow passage of fluid flow.
- the 164 plunger may push up against a seat 163.
- the valve activation system 120 is generally configured to open and close the valving element 160 based on comparing the detected difference between pressure, PI, from fluid line 125 and pressure, P2 , which is provided through fluid line 130 to a set pressure difference.
- Pressure, P2 denotes the pressure of the fluid just prior to bypassing the valving elements 160.
- the line 130 is connected at a particular location in FIGURE 1, in other configurations, the line 130 may sense pressure at different location, for example, further upstream towards the inlet 110.
- the valve activation system 120 compares the pressure differential, P1-P2, to a set pressure AP set . If the error (Pl-P2-AP set ) is within a predefined threshold range, nothing occurs - the valve system 100 is balanced. However, if the pressure differential (P1-P2) deviates either above or below the desired pressure differential AP set by an amount beyond the threshold, the valve activation system 120 causes a pressurizing or depressurizing of the chamber 168 to either open or close the valve by moving the plunger 164.
- the plunger 164 moves towards the left and decreases the area through which fluid may flow therearound. In other words, the flow rate is reduced and the differential pressure through across load restriction is decreased. Contrariwise, when the chamber 168 is de-pressurized, the plunger moves towards the right - allowing flow rate to be increased - thereby increasing the differential pressure.
- the pressure in the chamber 168 may then be exhausted through fluid line 140 (the same fluid line that provided the pressure) and ultimately through the fluid line 150 for passage downstream through the outlet 190.
- the pressure in the chamber 168 may be exhausted through lines 140 towards another mechanism.
- a biasing mechanism e.g., a spring or the like
- the force of the pressure from fluid line 140 overcomes such a biasing to move the plunger 164 to the left.
- FIGURE 1 Although a particular arrangement has been shown in FIGURE 1 where supplying pressure closes valving elements 160, the same principles may be used in the opposite manner where supplying of a pressure opens valving elements 160.
- a pressurization of the chamber 168 may move a plunger 164 to open an area through which fluid flows with a bias of the valve towards closing.
- the same or similar differential measurement may be made by the valve activation system 120, but accounting for the fact that the opposite scenario is occurring.
- the fluid flow may be completely disabled.
- a variable restriction may be utilized. For example, the further away from the pre-defined defined pressure differential, the faster the plunger 164 may be opened or close. However, as the pressure differential moves closer to the pre-defined pressure, the slower the plunger 164 may be opened or closed. Any suitable mechanism may be used for such a variable restriction including, for example, variable force springs.
- the set pressure AP set may be adjusted in a variety of manners in order to set pressure differential (P1-P2) .
- the process may be manual where, for example, movement of a screw in or out adjusts the pressure or pressure differential.
- AP set may come from a mechanism that automatically sets based on, for example, an electronic signal from a building management system. Yet other mechanisms may also be utilized to set the pressure or pressure differential according to particular embodiments .
- the valve activation system 120 may take on a variety of configurations. One non-limiting example is provided below with reference to FIGURES 2A, 2B, 2C, and 2D.
- FIGURES 2A, 2B, 2C, and 2D further illustrate a particular configuration of a valve system 200, according to an embodiment of the disclosure.
- the valve system 200 of FIGURES 2A, 2B, 2C, and 2D generally operates in the same manner as that described with reference to the valve system 100 of FIGURE 1 with an inlet 210, an outlet, 290, a valving element 260, a seat 263, a valve activation system 220, and fluid lines 225, 230, 240, 250.
- a fluid inlet 202 supplies fluid to a load 206, which may could consist of one or more heat exchangers used to heat or cool air in a building.
- An exit of the fluid from the load is the inlet 210 described with reference to inlet 110 of FIGURE1.
- Particular embodiments may desire a certain pressure differential across the load 206.
- the set pressure, PI may correspond to or be based upon a pressure upstream of the load 206, for example, as shown with a connection for line 225 upstream of the load 206.
- valve system 200 may be self-acting as an upstream pressure that is before a load effectively provides the actuating force further downstream in regulating of a pressure differential across the load.
- FIGURE 2B is a blow-up of the dashed portion in FIGURE 2A showing the details of the valve activation system 220, according to an embodiment of the disclosure.
- the valve activation system 220 includes a chamber 221, a diaphragm 222, a biasing mechanism 223, a rod 224 and a fluid circuit 227.
- this particular configuration is described, other suitable configurations may be utilized as will be recognized by one of ordinary skill in the art after having read the specification.
- the diaphragm 222 fluidly separates the chamber 221 into a first side 221a and a second side 221b.
- a biasing mechanism 223 such a spring.
- the biasing mechanism supplies a force on the diaphragm 222.
- the pressure, P2 is also supplied as a force on side 221a of the diaphragm 222.
- the second side 221b is fed the set-point pressure, PI, and works against the combined forces of the biasing mechanism 223 and the pressure, P2.
- pressure, PI may be provided in a plurality of manners.
- pressure, PI is based or is the actual pressure from an upstream portion of the load 206.
- the biasing amount of the biasing member 223 may be modified using manual or automatic mechanisms to change a desired difference in pressure differential.
- the rod 224 is connected to the diaphragm 222 and moves into or out of the chamber 221 depending on whether the pressure differential between PI and P2 , multiplied by the active area of the diaphragm 222, is greater or less than the force of biasing mechanism 223.
- the rod 224 actuates a three- way fluid circuit 227 shown by a typical schematic representation.
- a rectangle is divided into a series of sections, representing different possible positions of the valve.
- the contents of the sections are placed into the active area represented by connecting lines outside.
- This illustration shows three positions of the valve, with the current position being neutral providing no flow. Movement of the rod to the right would place the contents of the leftmost box where the center box currently is, allowing fluid to flow between PD and P3. Movement of the rod to the left would place the contents of the rightmost box in the position currently occupied by the center box, allowing flow between PI and PD.
- the illustration shows discrete states that are on or off, it is commonly understood that the passages created might be variable in their resistance to flow.
- Fs is the force from the spring
- A is the active area of the diaphragm
- PI is the pressure acting in the opposite side of the diaphragm from the spring
- P2 is the pressure on the same side of the diaphragm as the spring.
- FIGURE 2C shows the valve system 200 in a valve opening state, which can generally be represented by the following equation:
- the pressure differential (P1-P2) has grown small enough (P2 with the biasing mechanism 223 is overpowering PI) that the chamber 260 has now switched to a draining scenario.
- the fluid circuit 227 has fluidly connected line 240 to line.
- a pressure, PD, of the chamber 260 is initially larger than P3.
- FIGURE 2D shows the valve system 200 in a valve closing state, which can generally be represented by the following equation:
- the pressure differential (P1-P2) has grown large enough (PI overpowers P2 with the biasing mechanism) that the chamber 260 has now switched to a pressurizing scenario.
- the fluid circuit 227 mechanism 227 has connected line 240 to pressure, PI (and any other pressure mechanisms) .
- a pressure, PI (and any other pressure mechanisms) is larger than PD (the pressure in the chamber) and will pressurize the chamber until the fluid circuxt 227 mechanism changes to another position.
- FIGURES 3A and 3B illustrate yet another configuration of a valve system 300, according to an embodiment of the disclosure.
- the valve system 300 of FIGURE 3A generally operates in the same manner as that described with reference to the valve system 100 of FIGURE 1 with an inlet 310, an outlet, 390, a valve activation system 320, and fluid lines 325, 330, 340, 350.. Additionally, there is a load 306 between an inlet 302 and the inlet 310.
- the valve system 300 has the following additional details. There are multiple valving elements 360a, 360b, and 360c with corresponding chambers 368a, 368b, and 368c, and plungers 364a, 364b, and 364c.
- valving elements 360a, 360b, and 360c are shown in this configuration, in other configurations more than three or less than three may be utilized. Additionally, while each of the three valving elements 360a, 360b, and 360c is shown as having a similar shape and size, they may have different sizes and shapes.
- the multiple valving elements 360a, 360b, and 360c collectively work together to restrict or allow a flow volume between the inlet 310 and the outlet 390 of the conduit.
- the flow volume modifies the pressure or pressure differential.
- Each respective chamber 368a, 368b, and 368c is shown connected by the same line 340, which in this particular embodiment is used for pressurizing and depressuring the chambers 368a, 368b, and 368c.
- a plurality of valving elements 360a, 360b, and 360c can be driven by a shared pilot valve or shared pressuring source.
- a plurality of serial pilot valves work in concert to provide a common pressurizing source that may be utilized to drive the plurality of valving elements.
- a first pilot valve may control a first set of valving elements and a second pilot valve may control a second set of valving elements .
- a wall 380 is shown that may contain a plurality of openings 382.
- the wall may be placed adjacent the valving element 360 within the conduit 305 in order to direct the flow of fluid through the respective openings 382 and adjacent the plungers 364a, 364b, and 364c .
- the multiple valving elements 360 selectively restrict passage of fluid, for example, by covering the openings 382.
- each of the valving elements 360 need not be in the same state. This is because the common pressure through line 340 is supplied until the desired pressure differential (P2-P1) is achieved. Additionally, the plurality of valving elements 360 work together to provide the desired flow rate and hence, pressure. Accordingly, valving element 360a may have closed off a respective opening 382 by 20 percent whereas the other two valving elements 360b, 360c may have closed off their resepective openings 382 by 25 percent.
- a variable restriction may be utilized. For example, the further away from the pre-defined defined pressure differential, the faster the pressure differential may be changed. However, as the pressure differential moves closer to the pre-defined pressure differential, the slower the pressure differential may be changed. In particular embodiments, this may be accomplished through a manipulation of the make-up of valving elements, for example, having some smaller than others and having different biasing strengths.
- a variety of other advantages may also be availed in particular embodiments through the use of a plurality of valving elements 360 that work in concert with one another.
- the area of opening of the restricting element is typically approximated conically or cylindrically .
- the area of the opening therefore depends on the circumference of the element and the length of the opening.
- the height of the lift therefore has to increase in direct proportion.
- the area of the round opening increases with the square of the diameter. Accordingly, several valving elements in parallel having the same cross-sectional area can have less stroke than a comparable single valving element. According to particular embodiments, this reduces the cost for a given flow rate and reduces the size of the overall valve.
- each of the valving elements can be sized such that they are easy to machine. That is to say, very large valving elements typically require special machinery, while valving elements below a certain size can be made using ordinary machinery.
- Yet another advantage that may be availed from particular embodiments is the ability to make a relatively large numbers of valving elements. This allows efforts to perfect the valving elements to apply to a larger number of valves .
- Yet another advantage that may be availed from particular embodiments is the ability to emulate larger and larger valve size by simply can be placing more valving elements in parallel.
- the plurality of valving elements working together function like a much larger valve.
- the pilot valve might also have to be increased in size, or possibly more than one pilot valve might be used.
- Being able to play several valving elements in parallel allows the valve to be dealt with relatively little development time and with many of the parts being readily available from inventory.
- controller means any device, system or part thereof that controls at least one operation, such a device may be implemented in hardware, firmware or software, or some combination of at least two of the same . It should be noted that the functionality associated with any particular controller may be centralized or distributed, whether locally or remotely
Abstract
According to an embodiment of the disclosure, a system for regulating a pressure differential includes a plurality of valving elements (160, 260, 360a-360c) and a valve activation system (120, 220, 320). Each of the plurality of valving elements are configured to selectively allow and restrict at least a portion of a flow of fluid between an inlet (110, 210, 310) and an outlet (190, 290, 390) of a conduit (105, 305) through a respective opening and closing of each respective valving element. The valve activation system is configured to supply a common driving pressure to the plurality of valving elements. The common driving pressure is configured to initiate at least one of the opening or closing of the plurality of valving elements or to initiate the other of the opening or closing of the plurality of valving elements.
Description
SYSTEM FOR REGULATING PRESSURE DIFFERENTIALS ON A FLUID
TECHNICAL FIELD
[0001] This disclosure is generally directed to va systems. More specifically, this disclosure is directed systems for regulating pressure differentials on a fluid.
BACKGROUND
[0002] A variety of different heat transfer systems use water or other fluids to transfer heat or thermal energy between one or more production units and one or more loads . Such systems are often referred to as hydronic systems.
SUMMARY
[0003] This disclosure provides a system that regulates pressure differentials on a fluid.
[0004] According to an embodiment of the disclosure, a system for regulating a pressure differential includes a plurality of valving elements and a valve activation system. Each of the plurality of valving elements are configured to selectively allow and restrict at least a portion of a flow of fluid between an inlet and an outlet of a conduit through a respective opening and closing of each respective valving element. The valve activation system is configured to supply a common driving pressure to the plurality of valving elements. The common driving pressure is configured to initiate at least one of the opening or closing of the plurality of valving elements or to initiate the other of the opening or closing of the plurality of valving elements.
[0005] Certain embodiments may provide various technical advantages depending on the implementation. For example, a technical advantage of some embodiments may include using several valving elements in parallel that have less stroke than a single valving element with a similar area provided by the several parallel elements. A technical advantage of other embodiments may include the capability to have valving elements that are easy to machine as compared to large valves . Yet another technical advantage may include the capability to have larger valve sizing using a plurality of valving elements that together function as the larger valve.
[0006] Although specific advantages are above, various embodiments may include some, none, or all of the enumerated advantages. Additionally, other technical advantages may become readily apparent to one of ordinary skill in the art after review of the following figures and description.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] For a more complete understanding of this disclosure and its features, reference is now made to the following description, taken in conjunction with the accompanying drawings, in which:
[0008] FIGURE 1 illustrates basic components of a valve system, according to an embodiment of the disclosure;
[0009] FIGURE 2A shows a balanced state of a valve system, according to an embodiment of the disclosure ;
[0010] FIGURE 2B is a blow-up of the dashed portion in
FIGURE 2A showing the details of the valve activation system, according to an embodiment of the disclosure;
[0011] FIGURE 2C shows the valve system of FIGURE 2A in a valve opening state, according to an embodiment of the disclosure ,-
[0012] FIGURE 2D shows the valve system of FIGURE 2A in a valve closing state, according to an embodiment of the disclosure; and
[0013] FIGURES 3A and 3B illustrates yet another configuration of a valve system, according to an embodiment of the disclosure.
DETAILED DESCRIPTION
[0014] The FIGURES described below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure invention may be implemented in any type of suitably arranged device or system.
[0015] FIGURE 1 illustrates basic components of a valve system 100, according to an embodiment of the disclosure. In FIGURE 1, a valve system 100 is generally shown as a mechanism that controls flow (as generally indicated by line 185) between an inlet 110 and an outlet 190 in a conduit 105. By regulating the flow between the inlet 110 and the outlet 190, pressure or a pressure differential may be regulated. The valve system 100 may be used in virtually any setting, controlling the volume of fluid flowing therethrough. In particular embodiments, the valve system 100 may be used in a hydronic heating or cooling system.
[0016] The valve system 100 in this particular embodiment includes a valve activation system 120, a valving element 160, a connection to a pressure (generally indicated by line 125) elsewhere in the system, and fluid lines 130, 140, and 150. The valve system 100 has been simplified for purpose of brevity in illustration and may include more, less, or different components as will become apparent to one of ordinary skill in the art after review of the disclosure.
[0017] The valving element 160 include at least a plunger 164 and a chamber 168. In particular configurations, the valving element may be considered a so-called "cartridge." Although only one valving element 160 is shown in this configuration, other configurations that will be described below may include more valving elements that collectively
control a flow rate. The valving element 160 is generally configured to restrict or allow the passage of fluid between the inlet 110 and the outlet 190. By restricting passage (or possibly even eliminating passage) of fluid between the inlet 110 and the outlet 190, pressure is increased. A certain pressure or pressure differential may be desired. For example, in particular configurations, a pressure differential across a load may be desired. The valving element 160 through modification of the flow rate allow such a pressure differential to be maintained as will be described in further details below.
[0018] The conduit 105 may have features therein that interact with the valving element 160 in order to selectively restrict or allow passage of fluid flow. As a non-limiting example, the 164 plunger may push up against a seat 163.
[0019] The valve activation system 120 is generally configured to open and close the valving element 160 based on comparing the detected difference between pressure, PI, from fluid line 125 and pressure, P2 , which is provided through fluid line 130 to a set pressure difference. Pressure, P2 , denotes the pressure of the fluid just prior to bypassing the valving elements 160. Although the line 130 is connected at a particular location in FIGURE 1, in other configurations, the line 130 may sense pressure at different location, for example, further upstream towards the inlet 110.
[0020] For a variety of reasons (e.g., due to various loads), the pressure differential, P1-P2, may change. Accordingly, the valve activation system 120 compares the pressure differential, P1-P2, to a set pressure APset . If the error (Pl-P2-APset) is within a predefined threshold range, nothing occurs - the valve system 100 is balanced. However, if the pressure differential (P1-P2) deviates either above or below the desired pressure differential APset by an amount
beyond the threshold, the valve activation system 120 causes a pressurizing or depressurizing of the chamber 168 to either open or close the valve by moving the plunger 164.
[0021] When the chamber 168 is pressurized through the fluid line 140, the plunger 164 moves towards the left and decreases the area through which fluid may flow therearound. In other words, the flow rate is reduced and the differential pressure through across load restriction is decreased. Contrariwise, when the chamber 168 is de-pressurized, the plunger moves towards the right - allowing flow rate to be increased - thereby increasing the differential pressure.
[0022] In de-pressurizing the chamber, the pressure in the chamber 168 may then be exhausted through fluid line 140 (the same fluid line that provided the pressure) and ultimately through the fluid line 150 for passage downstream through the outlet 190. In other configurations, the pressure in the chamber 168 may be exhausted through lines 140 towards another mechanism. Although not expressly shown, a biasing mechanism (e.g., a spring or the like) may be used to bias the plunger 164 towards the right for a depressurizing scenario. In such a configuration, the force of the pressure from fluid line 140 overcomes such a biasing to move the plunger 164 to the left.
[0023] Although a particular arrangement has been shown in FIGURE 1 where supplying pressure closes valving elements 160, the same principles may be used in the opposite manner where supplying of a pressure opens valving elements 160. For example, a pressurization of the chamber 168 may move a plunger 164 to open an area through which fluid flows with a bias of the valve towards closing. The same or similar differential measurement may be made by the valve activation system 120, but accounting for the fact that the opposite scenario is occurring.
[0024] As referenced above, in particular configurations,
the fluid flow may be completely disabled. Additionally, in particular configurations, a variable restriction may be utilized. For example, the further away from the pre-defined defined pressure differential, the faster the plunger 164 may be opened or close. However, as the pressure differential moves closer to the pre-defined pressure, the slower the plunger 164 may be opened or closed. Any suitable mechanism may be used for such a variable restriction including, for example, variable force springs.
[0025] The set pressure APset may be adjusted in a variety of manners in order to set pressure differential (P1-P2) . In one configuration, the process may be manual where, for example, movement of a screw in or out adjusts the pressure or pressure differential. In other embodiments, APset may come from a mechanism that automatically sets based on, for example, an electronic signal from a building management system. Yet other mechanisms may also be utilized to set the pressure or pressure differential according to particular embodiments .
[0026] The valve activation system 120 may take on a variety of configurations. One non-limiting example is provided below with reference to FIGURES 2A, 2B, 2C, and 2D.
[0027] FIGURES 2A, 2B, 2C, and 2D further illustrate a particular configuration of a valve system 200, according to an embodiment of the disclosure. The valve system 200 of FIGURES 2A, 2B, 2C, and 2D generally operates in the same manner as that described with reference to the valve system 100 of FIGURE 1 with an inlet 210, an outlet, 290, a valving element 260, a seat 263, a valve activation system 220, and fluid lines 225, 230, 240, 250.
[0028] With reference to FIGURE 2A, a fluid inlet 202 supplies fluid to a load 206, which may could consist of one or more heat exchangers used to heat or cool air in a
building. An exit of the fluid from the load is the inlet 210 described with reference to inlet 110 of FIGURE1. Particular embodiments may desire a certain pressure differential across the load 206. Accordingly, the set pressure, PI, may correspond to or be based upon a pressure upstream of the load 206, for example, as shown with a connection for line 225 upstream of the load 206.
[0029] With such a configuration, the valve system 200 may be self-acting as an upstream pressure that is before a load effectively provides the actuating force further downstream in regulating of a pressure differential across the load.
[0030] FIGURE 2B is a blow-up of the dashed portion in FIGURE 2A showing the details of the valve activation system 220, according to an embodiment of the disclosure. In particular, a modified pilot valve configuration is shown. The valve activation system 220 includes a chamber 221, a diaphragm 222, a biasing mechanism 223, a rod 224 and a fluid circuit 227. Although this particular configuration is described, other suitable configurations may be utilized as will be recognized by one of ordinary skill in the art after having read the specification.
[0031] The diaphragm 222 fluidly separates the chamber 221 into a first side 221a and a second side 221b. On the first side 221a of the diaphragm 222 is a biasing mechanism 223 such a spring. The biasing mechanism supplies a force on the diaphragm 222. The pressure, P2, is also supplied as a force on side 221a of the diaphragm 222. The second side 221b is fed the set-point pressure, PI, and works against the combined forces of the biasing mechanism 223 and the pressure, P2. As referenced above, pressure, PI, may be provided in a plurality of manners. With specific reference to FIGURE 2A, pressure, PI, is based or is the actual pressure from an upstream portion of the load 206. Additionally, in particular
configurations, the biasing amount of the biasing member 223 may be modified using manual or automatic mechanisms to change a desired difference in pressure differential.
[0032] The rod 224 is connected to the diaphragm 222 and moves into or out of the chamber 221 depending on whether the pressure differential between PI and P2 , multiplied by the active area of the diaphragm 222, is greater or less than the force of biasing mechanism 223.
[0033] As seen in FIGURE 2B, the rod 224 actuates a three- way fluid circuit 227 shown by a typical schematic representation. In such a representation, a rectangle is divided into a series of sections, representing different possible positions of the valve. As the valve is actuated, the contents of the sections are placed into the active area represented by connecting lines outside. This illustration shows three positions of the valve, with the current position being neutral providing no flow. Movement of the rod to the right would place the contents of the leftmost box where the center box currently is, allowing fluid to flow between PD and P3. Movement of the rod to the left would place the contents of the rightmost box in the position currently occupied by the center box, allowing flow between PI and PD. Even though the illustration shows discrete states that are on or off, it is commonly understood that the passages created might be variable in their resistance to flow.
[0034] With reference to these particular positions, in the position of FIGURE 2A, there is no transfer of the fluid either to or from line 240. In the position of FIGURE 2C, line 240 has been connected to line 250 for a draining of chamber 260. In FIGURE 2D, line 225 has been connected to line 250 for a pressurizing of the chamber.
[0035] Again, it should be expressly understood that although particular configurations are shown in FIGURES 2A,
2B, 2C, and 2D, other configurations can avail from teachings of this disclosure.
[0036] With reference again to FIGURE 2A, a balanced state of the valve system 200 is shown, which can generally be represented by the following equation:
Fs = (P1-P2) *A
Where Fs is the force from the spring, A is the active area of the diaphragm, PI is the pressure acting in the opposite side of the diaphragm from the spring, and P2 is the pressure on the same side of the diaphragm as the spring.
[0037] In the balanced state, there is no movement of the plunger 264 to either an opening or a closing position.
[0038] FIGURE 2C shows the valve system 200 in a valve opening state, which can generally be represented by the following equation:
Fs > (P1-P2) *A
[0039] In other words, the pressure differential (P1-P2) has grown small enough (P2 with the biasing mechanism 223 is overpowering PI) that the chamber 260 has now switched to a draining scenario. In particular, the fluid circuit 227 has fluidly connected line 240 to line. In such a scenario, a pressure, PD, of the chamber 260 is initially larger than P3.
However, when enough pressure has been released, the pressure,
PD, will equalize and become the same as P3.
[0040] FIGURE 2D shows the valve system 200 in a valve closing state, which can generally be represented by the following equation:
Fs < (P1-P2) *A
[0041] In other words, the pressure differential (P1-P2) has grown large enough (PI overpowers P2 with the biasing mechanism) that the chamber 260 has now switched to a pressurizing scenario. In particular, the fluid circuit 227 mechanism 227 has connected line 240 to pressure, PI (and any
other pressure mechanisms) . In such a scenario, a pressure, PI (and any other pressure mechanisms) is larger than PD (the pressure in the chamber) and will pressurize the chamber until the fluid circuxt 227 mechanism changes to another position.
[0042] FIGURES 3A and 3B illustrate yet another configuration of a valve system 300, according to an embodiment of the disclosure. The valve system 300 of FIGURE 3A generally operates in the same manner as that described with reference to the valve system 100 of FIGURE 1 with an inlet 310, an outlet, 390, a valve activation system 320, and fluid lines 325, 330, 340, 350.. Additionally, there is a load 306 between an inlet 302 and the inlet 310. However, the valve system 300 has the following additional details. There are multiple valving elements 360a, 360b, and 360c with corresponding chambers 368a, 368b, and 368c, and plungers 364a, 364b, and 364c. Although three valving elements 360a, 360b, and 360c are shown in this configuration, in other configurations more than three or less than three may be utilized. Additionally, while each of the three valving elements 360a, 360b, and 360c is shown as having a similar shape and size, they may have different sizes and shapes.
[0043] In operation, the multiple valving elements 360a, 360b, and 360c collectively work together to restrict or allow a flow volume between the inlet 310 and the outlet 390 of the conduit. The flow volume, in turn, modifies the pressure or pressure differential.
[0044] Each respective chamber 368a, 368b, and 368c is shown connected by the same line 340, which in this particular embodiment is used for pressurizing and depressuring the chambers 368a, 368b, and 368c. Thus, according to particular embodiments, a plurality of valving elements 360a, 360b, and 360c can be driven by a shared pilot valve or shared pressuring source. In yet other configurations, a plurality of
serial pilot valves work in concert to provide a common pressurizing source that may be utilized to drive the plurality of valving elements. In still yet other configurations, a first pilot valve may control a first set of valving elements and a second pilot valve may control a second set of valving elements .
[0045] A wall 380 is shown that may contain a plurality of openings 382. The wall may be placed adjacent the valving element 360 within the conduit 305 in order to direct the flow of fluid through the respective openings 382 and adjacent the plungers 364a, 364b, and 364c . The multiple valving elements 360 selectively restrict passage of fluid, for example, by covering the openings 382.
[0046] In operation, each of the valving elements 360 need not be in the same state. This is because the common pressure through line 340 is supplied until the desired pressure differential (P2-P1) is achieved. Additionally, the plurality of valving elements 360 work together to provide the desired flow rate and hence, pressure. Accordingly, valving element 360a may have closed off a respective opening 382 by 20 percent whereas the other two valving elements 360b, 360c may have closed off their resepective openings 382 by 25 percent.
[0047] As referenced earlier, in particular configurations, a variable restriction may be utilized. For example, the further away from the pre-defined defined pressure differential, the faster the pressure differential may be changed. However, as the pressure differential moves closer to the pre-defined pressure differential, the slower the pressure differential may be changed. In particular embodiments, this may be accomplished through a manipulation of the make-up of valving elements, for example, having some smaller than others and having different biasing strengths.
[0048] A variety of other advantages may also be availed in
particular embodiments through the use of a plurality of valving elements 360 that work in concert with one another. For example, in the case of a valving element that has flow entering axially and exiting radially (or vice versa) , the area of opening of the restricting element is typically approximated conically or cylindrically . The area of the opening therefore depends on the circumference of the element and the length of the opening. As the elements are increased in diameter, the height of the lift therefore has to increase in direct proportion. In the meantime, the area of the round opening increases with the square of the diameter. Accordingly, several valving elements in parallel having the same cross-sectional area can have less stroke than a comparable single valving element. According to particular embodiments, this reduces the cost for a given flow rate and reduces the size of the overall valve.
[0049] Additionally, according to particular embodiments, each of the valving elements can be sized such that they are easy to machine. That is to say, very large valving elements typically require special machinery, while valving elements below a certain size can be made using ordinary machinery.
[0050] Yet another advantage that may be availed from particular embodiments is the ability to make a relatively large numbers of valving elements. This allows efforts to perfect the valving elements to apply to a larger number of valves .
[0051] Yet another advantage that may be availed from particular embodiments is the ability to emulate larger and larger valve size by simply can be placing more valving elements in parallel. In other words, the plurality of valving elements working together function like a much larger valve. In such scenarios, the pilot valve might also have to be increased in size, or possibly more than one pilot valve might
be used. Being able to play several valving elements in parallel allows the valve to be dealt with relatively little development time and with many of the parts being readily available from inventory.
[0052] It will be understood that well known processes have not been described in detail and have been omitted for brevity. Although specific steps, structures and materials may have been described, the present disclosure may not be limited to these specifics, and others may be substituted as it is well understood by those skilled in the art, and various steps may not necessarily be performed in the sequences shown.
[0053] It may be advantageous to set forth definitions of certain words and phrases used throughout this patent document. The terms "include" and "comprise," as well as derivatives thereof, mean inclusion without limitation. The term "or" is inclusive, meaning and/or. The phrase "associated with," as well as derivatives thereof, may mean to include, be included within, interconnect with, contain, be contained within, connect to or with, couple to or with, be communicable with, cooperate with, interleave, juxtapose, be proximate to, be bound to or with, have, have a property of, have a relationship to or with, or the like. The term "controller" means any device, system or part thereof that controls at least one operation, such a device may be implemented in hardware, firmware or software, or some combination of at least two of the same . It should be noted that the functionality associated with any particular controller may be centralized or distributed, whether locally or remotely
[0054] While this disclosure has described certain embodiments and generally associated methods, alterations and permutations of these embodiments and methods will be apparent to those skilled in the art. Accordingly, the above description of example embodiments does not define or
constrain this disclosure. Other changes, substitutions, and alterations are also possible without departing from the spirit and scope of this disclosure, as defined by the following claims.
Claims
1. A system for regulating a pressure differential, the system comprising:
a plurality of valving elements, each of the plurality of valving elements configured to selectively allow and restrict at least a portion of a flow of fluid between an inlet and an outlet of a conduit through a respective opening and closing of each respective valving element; and
a valve activation system configured to supply a common driving pressure to the plurality of valving elements, the common driving pressure configured to:
initiate at least one of the opening or closing of the plurality of valving elements, or
initiate the other of the opening or closing of the plurality of valving elements.
2. The system of Claim 1, wherein the valve activation system is configured to:
receive a first pressure and a second pressure, the second pressure received from a location in the conduit that is upstream of the plurality of valving elements,
initiate at least one of the opening or closing of the plurality of valving elements when the pressure differential between the first pressure and the second pressure has decreased beyond a pre-defined threshold, and
initiate the other of the opening or closing of the the plurality of valving elements when the pressure differential between the first pressure and the second pressure has increased beyond a pre-defined threshold.
3. The system of Claim 2, wherein
the first pressure is received from a location upstream of the at least one valving element before a load; and
the second pressure is receive from a location upstream of the at least one valving element after the load.
4. The system of Claim 2, wherein the valve activation system is further configured to:
connect the first pressure to the chambers as at least a portion of the common driving pressure during a pressurizing of the chambers, and
connect the chambers to a fluid line in communication with a location in the conduit downstream from the at least one valving element during a depressurizing of the chamber.
5. The system of Claim 1, wherein
each of the plurality of valving elements includes a chamber, and
the valve activation system in the initiating the at least one of the opening or closing of the plurality of valving elements and the initiating the other of the opening or closing of plurality of valving elements element either allows the chambers to be pressurized or depressurized.
6. The system of Claim 1, wherein at least two of the plurality of valving elements have different sizes.
7. The system of Claim 1, wherein the pressurizing or depressurizing of the chambers is through a common fluid line between the valve activation system and the valving element.
8. The system of Claim 1, wherein the pre-defined threshold is a range of temperature differentials.
9. The system of Claim 1, further comprising:
a wall positioned in the conduit, the wall containing a plurality of openings, each of the plurality of openings positioned adjacent at least one of the plurality of valving elements in order to force the flow of fluid through the respective opening up against a sealing member of the at least one of the plurality of openings,
wherein each sealing member is configured to selectively cover and uncover the respective opening in the wall in the opening and closing of the at least one valving element.
10. The system of Claim 1, wherein either the pressure differential or the pre-defined threshold is modifiable.
11. The system of Claim 1, wherein the valve activation system further comprises:
a chamber configured to determine the pressure differential, the chamber divided into a first portion and second portion by a diaphragm, the first portion containing a biasing member and receiving the second pressure, the second portion receiving the first pressure, the second pressure and the biasing member proving a force on the diaphragm from a first side, and the first pressure proving a force on the diaphragm from a second side;
a rod configured to move when the force from either the first side or the second side of the diaphragm is greater than the force from the other of the first side or the second side; and
a fluid circuit mechanism connected to the rod and having more than one position for a connection of fluid lines, the fluid circuit mechanism moving to respective positions upon the rod moving.
12. The system of Claim 1, wherein the valve activation system is a pilot valve.
13. The system of Claim 1 wherein the valve activation system is electronic and initiates the opening or closing of valving elements based on at least one signal from at least one sensor.
14. A system for regulating a pressure differential, the system comprising:
at least one valving element configured to selectively allow and restrict a flow of fluid between an inlet and an outlet of a conduit through a respective opening and closing of the at least one valving element; and
a valve activation system configured to receive a first pressure and a second pressure, the second pressure received from a location in the conduit that is upstream of the at least one valving element, wherein the valve activation system is further configured to:
initiate at least one of the opening or closing of the at least one valving element when the pressure differential between the first pressure and the second pressure has decreased beyond a pre-defined threshold; and
initiate the other of the opening or closing of the at least one valving element when the pressure differential between the first pressure and the second pressure has decreased beyond a pre-defined threshold.
15. The system of Claim 14, wherein
the at least one valving element includes a chamber, and the valve activation system in the initiating the at least one of the opening or closing of the at least one valving element and the initiating the other of the opening or
closing of the at least one valving element either allows the chamber to be pressurized or depressurized.
16. The system of Claim 14, wherein the pressurizing or depressurizing of the chamber is through a common fluid line between the valve activation system and the valving element .
17. The system of Claim 14, wherein the valve activation system is further configured to:
connect the first pressure to the chamber during a pressurizing of the chamber, and
connect the chamber to a fluid line in communication with a location in the conduit downstream from the at least one valving element during a depressurizing of the chamber.
18. The system of Claim 14, wherein the pre-defined threshold is a range of temperature differentials.
19. The system of Claim 14, wherein
the first pressure is received from a location upstream of the at least one valving element before a load; and
the second pressure is receive from a location upstream of the at least one valving element after the load.
20. The system of Claim 14, further comprising:
a wall positioned in the conduit, the wall containing at least one opening and positioned adjacent the at least one valving element in order to force the flow of fluid through the at least one open up against a sealing member of the at least one valving element,
wherein the sealing member is configured to selectively cover and uncover the at least one opening in the wall in the opening and closing of the at least one valving element.
21. The system of Claim 14, wherein either the pressure differential or the pre-defined threshold is modifiable.
22. The system of Claim 14, wherein the valve activation system further comprises:
a chamber configured to determine the pressure differential, the chamber divided into a first portion and second portion by a diaphragm, the first portion containing a biasing member and receiving the second pressure, the second portion receiving the first pressure, the second pressure and the biasing member proving a force on the diaphragm from a first side, and the first pressure proving a force on the diaphragm from a second side;
a rod configured to move when the force from either the first side or the second side of the diaphragm is greater than the force from the other of the first side or the second side; and
a fluid circuit mechanism connected to the rod and having more than one position for a connection of fluid lines, the fluid circuit mechanism moving to respective positions upon the rod moving.
23. The system of Claim 14, wherein the valve activation system is a pilot valve.
24. A system of Claim 14 wherein the valve activation system is electronic and initiates the opening or closing of valving elements based on at least one signal from at least one sensor.
Priority Applications (1)
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EP14844166.0A EP3047342A4 (en) | 2013-09-16 | 2014-09-16 | System for regulating pressure differentials on a fluid |
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Application Number | Priority Date | Filing Date | Title |
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US14/028,370 US9442493B2 (en) | 2013-09-16 | 2013-09-16 | System for regulating pressure differentials on a fluid |
US14/028,370 | 2013-09-16 |
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WO2015039136A2 true WO2015039136A2 (en) | 2015-03-19 |
WO2015039136A3 WO2015039136A3 (en) | 2015-05-14 |
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PCT/US2014/055950 WO2015039136A2 (en) | 2013-09-16 | 2014-09-16 | System for regulating pressure differentials on a fluid |
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US (1) | US9442493B2 (en) |
EP (1) | EP3047342A4 (en) |
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US9442493B2 (en) * | 2013-09-16 | 2016-09-13 | Imi Hydronic Engineering, Inc. | System for regulating pressure differentials on a fluid |
WO2020163190A1 (en) | 2019-02-05 | 2020-08-13 | Swagelok Company | Integrated actuator manifold for multiple valve assembly |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2333863A (en) | 1996-10-08 | 1999-08-04 | Yokota Mfg | Automatic regulating valve apparatus |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
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US2579334A (en) * | 1949-07-30 | 1951-12-18 | Shell Dev | Adjustable-rate differential pressure responsive device |
US2837241A (en) * | 1952-08-20 | 1958-06-03 | Donald G Griswold | Liquid flow control means for refueling apparatus and the like |
US3256905A (en) * | 1962-12-19 | 1966-06-21 | Griswold Controls | Single and multiple rate-of-flow control valves |
US3625246A (en) * | 1969-09-22 | 1971-12-07 | Matrix Corp | Nonbleed high-pressure positioner |
US4117670A (en) * | 1976-12-23 | 1978-10-03 | Bell Telephone Laboratories Incorporated | Dual slope temperature differential shutdown control for gas turbines |
US4768544A (en) * | 1987-05-26 | 1988-09-06 | Beam Engineering, Inc. | Digital valve flow control system |
US5056551A (en) * | 1989-08-17 | 1991-10-15 | Eaton Corporation | Fast acting multiple element valve |
DE4039766C1 (en) * | 1990-12-13 | 1992-06-04 | Fa. Carl Freudenberg, 6940 Weinheim, De | |
EP0911714A1 (en) * | 1997-10-20 | 1999-04-28 | Electrowatt Technology Innovation AG | Flow control valve with integrated pressure controller |
US6467505B1 (en) * | 2000-10-11 | 2002-10-22 | Flowmatrix Inc. | Variable pressure regulated flow controllers |
US6832628B2 (en) * | 2000-10-11 | 2004-12-21 | Flowmatrix, Inc. | Variable pressure regulated flow controllers |
JP2007102754A (en) * | 2005-09-09 | 2007-04-19 | Advance Denki Kogyo Kk | Flow controller |
US7857233B2 (en) * | 2006-09-01 | 2010-12-28 | Flow Design, Inc. | Electronically based control valve with feedback to a building management system (BMS) |
US8235070B2 (en) * | 2008-06-02 | 2012-08-07 | Eaton Corporation | Two position three way valve |
DE102008028543B3 (en) * | 2008-06-16 | 2009-10-08 | Reinz-Dichtungs-Gmbh | Valve for use in venting system for ventilation of crank case of combustion engine, has auxiliary membrane and bar provided for producing force on flexibly movable tax control membrane as function of difference of pressure |
US9442493B2 (en) * | 2013-09-16 | 2016-09-13 | Imi Hydronic Engineering, Inc. | System for regulating pressure differentials on a fluid |
-
2013
- 2013-09-16 US US14/028,370 patent/US9442493B2/en active Active
-
2014
- 2014-09-16 WO PCT/US2014/055950 patent/WO2015039136A2/en active Application Filing
- 2014-09-16 EP EP14844166.0A patent/EP3047342A4/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2333863A (en) | 1996-10-08 | 1999-08-04 | Yokota Mfg | Automatic regulating valve apparatus |
Also Published As
Publication number | Publication date |
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WO2015039136A3 (en) | 2015-05-14 |
US9442493B2 (en) | 2016-09-13 |
US20150075641A1 (en) | 2015-03-19 |
EP3047342A2 (en) | 2016-07-27 |
EP3047342A4 (en) | 2017-08-02 |
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