US3370604A - Self-priming liquid pumping system and primer valve - Google Patents

Self-priming liquid pumping system and primer valve Download PDF

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Publication number
US3370604A
US3370604A US418707A US41870764A US3370604A US 3370604 A US3370604 A US 3370604A US 418707 A US418707 A US 418707A US 41870764 A US41870764 A US 41870764A US 3370604 A US3370604 A US 3370604A
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United States
Prior art keywords
valve
liquid
pump
suction
discharge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US418707A
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English (en)
Inventor
Pellegrino E Napolitano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PRIMAVAC SYSTEMS Inc A CORP OF NEW JERSEY
Original Assignee
HUDSON EUGINEERING Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HUDSON EUGINEERING Co filed Critical HUDSON EUGINEERING Co
Priority to US418707A priority Critical patent/US3370604A/en
Priority to GB52126/65A priority patent/GB1130347A/en
Priority to NO160876A priority patent/NO125110B/no
Priority to NL6516324A priority patent/NL6516324A/xx
Priority to DK643265AA priority patent/DK137144B/da
Priority to FR42470A priority patent/FR1462590A/fr
Priority to SE16279/65A priority patent/SE331423B/xx
Priority to BE673801D priority patent/BE673801A/xx
Priority to DE19651528722 priority patent/DE1528722C3/de
Priority to ES0320812A priority patent/ES320812A1/es
Application granted granted Critical
Publication of US3370604A publication Critical patent/US3370604A/en
Assigned to PRIMAVAC SYSTEMS INC., A CORP OF NEW JERSEY reassignment PRIMAVAC SYSTEMS INC., A CORP OF NEW JERSEY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HUDSON ENGINEERING COMPANY, A CORP OF NJ
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20—Excess-flow valves
    • F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/004—Priming of not self-priming pumps
    • F04D9/005—Priming of not self-priming pumps by adducting or recycling liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/004—Priming of not self-priming pumps
    • F04D9/006—Priming of not self-priming pumps by venting gas or using gas 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
    • Y10T137/2574—Bypass or relief controlled by main line fluid condition
    • Y10T137/2579—Flow rate responsive
    • Y10T137/2587—Bypass or relief valve biased open
    • 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
    • Y10T137/2574—Bypass or relief controlled by main line fluid condition
    • Y10T137/2579—Flow rate responsive
    • Y10T137/2599—Venturi

Definitions

  • valve element of said primer valve Upon a reduction in fluid flow through the discharge conduit due to loss of suction at the pump, the valve element of said primer valve is moved to its open position to enable a predetermined quantity of fluid in the discharge conduit to pass through the port for recycle to the suction side of the pump in order to reprime the pump.
  • the present invention relates to self-priming liquid pumping systems and, more particularly, to an improved primer valve construction for eifecting automatic selfpriming of a liquid pump without interfering with the normal operation of the pump or complicating its maintenance.
  • One type of device for accomplishing repriming effects self-priming of the pump by a primer valve located in the discharge passage of the pump which closes the discharge passage and opens a port communicating the discharge passage with the Well surrounding the pump whereby a quantity of previously pumped and stored liquid is recycled back to the suction Well and pump inlet.
  • the recycled liquid is pumped, forcing the primer valve to assume a position which opens the discharge passage and closes the port. If the pump is not fully reprimed, the primer valve again closes the discharge passage and opens the port for another recycle. This recycling through the pump unit continues in this fashion until the suction inlet is once again submerged in liquid and the normal pumping cycle is restored.
  • the heart of the recycle type of self-priming system described is the primer valve that closes the discharge passage and opens a port to the suction Well of the pump unit to allow the stored liquid to once again be pumped in order to restore normal suction at the pump inlet.
  • the primer valve is located inside the discharge passage and includes a sliding valve element or the like mounted for movement along or relative to the central axis of the pump unit. While this arrangement has proven to be generally satis- 3,37%,6d4 Patented Feb. 27, 1968 factory for the purpose indicated, there has been a long felt need in the art for an improved primer valve arrangement for this type of pumping system because maintenance of the valve requires removal of the pump shaft. Also, simple replacement of a valve necessitates dismantling the pump.
  • my invention is directed generally to the type of system and valve described and particularly to a novel primer valve and associated actuator construction that gives improved operation of the self-priming pumping system. Basically, this improved operation is due to location of the valve of the invention outside of the discharge passage of the system rather than inside as taught by the prior art.
  • the improved valve also includes a remote sensor element in the discharge passage for initiating actuation of said valve.
  • a valve assembly is provided that is simple in construction and which has improved operating characteristics for the purpose indicated.
  • a further object of the present invention is to provide a primer valve characterized by a simple design wherein the parts do not require finishing to close tolerances and which, therefore, will not become clogged by chemicals or other foreign matter in the liquid that operates the same.
  • One of the more important and significant objects of the present invention is to provide a primer valve that is easily accessible for service or replacement and which does not require disassembly of the pump and shaft for removal of or installation of said valve.
  • a still further object of the present invention is to provide a primer valve of the poppet type and control means that has a rapid response to a change in the condition of discharge flow to thereby speed the priming operation of the associated pump.
  • FIGURE 1 is a schematic illustration of a pumping system embodying the improved valve construction of the present invention
  • FIGURE 2 is an enlarged sectional view illustrating the structure of the valve assembly of this invention
  • FIGURE 3 is another embodiment of the valve assembly constructed in accordance with the present invention.
  • FIGURE 4 is another embodiment of hte valve assembly constructed in accordance with the present invention.
  • FIGURE 5 is another embodiment of the valve assembly constructed in accordance with the present invention.
  • FIGURE 6 is a sectional view taken along line 66 of FIGURE 4.
  • the device of the invention is or may be associated with a conventional center shaft centrifugal pump, as illustrated in FIGURE 1, but it is to be understood that it can be utilized with other types of pumps if desired.
  • Pumping system 1 raises the liquid to the desired location by suction and reprimes itself automatically. That is, upon the entrance of air into the system via inlet or suction pipe 2 and the resultant discontinuance of the normal flow of liquid through said pipe 2, the primer valve, generally represented by reference numeral 3 in the accompanying drawings, opens discharge pipe 4 to suction well 5 so that the system 1 is primed with previously pumped liquid stored in upper portions of the discharge passage of the pipe 4, whereby normal pumping operations can be resumed.
  • the suction pipe 2 continues to admit air to the suction well 5 in sufficient quantities to prevent normal pump operation after the liquid from the upper portions of the discharge pipe 4 has been recycled to the bottom portion of the suction well 5 by gravity and the priming cycle is incomplete, the same priming liquid will be recycled indefinitely until the end of the inlet pipe 2 is once again sufiiciently submerged in liquid to establish a continuous pumping operation.
  • the primer valve 3 is mounted outside the discharge pipe 4, preferably on the wall of a removable section 6 of said pipe 4.
  • this arrangement has been found to give improved results and advantages over the prior designs wherein the valve element was mounted inside the discharge passage and conflicted with pump shaft 20. More specifically, by bringing the valve 3 outside the discharge passage, the tortuous flow path required to conduct the liquid past the valve element during the pumping operation is eliminated, whereby a source of resistance in the system is removed thereby increasing the overall efliciency of the pumping operation.
  • the valve construction is such as to improve the operation of the priming cycle as will be discussed later in the detailed description of the valve 3.
  • An inspection window 7 is provided along the wall of the suction well 5 opposite the primer valve assembly 3 for easy access to the valve 3 for service or replacement if required.
  • a plate 8 having suitable fastener means 9 is provided to seal the window 7 during the pumping operation so that suction can be maintained in the well 5, for reasons which will subsequently become apparent.
  • the valve 3 and the window 7 are preferably located above the normal liquid level at the inlet pipe 2, but in some cases it may be desirable to provide the inlet pipe 2 at the top of the well 5 to increase the amount of liquid available for pumping before the system will run dry.
  • a motor 10 is provided to turn any number of pump elements or sections 11, as schematically illustrated in the figure; it being understood that the pump elements 11 are interconnected with said motor 10 through a suitable drive shaft 20 (not shown in FIGURE 1) extending through the center of the discharge pipe 4.
  • the motor 10 drives the pump elements 11 continually.
  • An intake skirt 12 is provided to supply the pump elements 11 with the liquid contained in the bottom of the suction well 5.
  • check valve 13 prevents liquid in delivery conduit 14 from flowing by gravity back into the pumping system if the pumping operation is discontinued.
  • a relief conduit 15 interconnects the upper portion of the suction well 5 and V tern 1 will pump liquid until the admission of air into the system causes a discontinuance of normal suction whereupon the system will reprime itself until normal operation is resumed.
  • FIGURE 2 of the accompanying drawings there is illustrated a detailed view of the novel valve assembly 3 of the invention mounted on the outside of the pipe section 6 of the discharge pipe 4.
  • a drive shaft 20 extends through a central discharge passage 21 of the discharge pipe 4, including the valve mounting section 6.
  • the shaft 20 also extends through pump passage 23 for connection to the impeller blades (not shown) of the pump elements 11.
  • the valve assembly 3 has a housing 30, which may be fabricated in tubular or any other convenient configuration.
  • the housing is open at one end, as indicated by reference numeral 31, and it is this end 31 of the housing 30 that is adapted for mating relationship with the outside of pipe section 6.
  • Suitable mounting flanges 32 and 33 having any number of mounting bolts 34 fasten the housing 30 into position opposite a port 35 in the side wall of the pipe section 6.
  • any number of ports 35 could be positioned around the pipe section 6, each with its associated valve assembly 3.
  • the inside of the housing 30 is machined to provide a cylindrical control chamber in which is mounted a piston 41 adapted for reciprocation and having a conventional O-ring 42 for sealing purposes.
  • the piston 41 carries a poppet type valve element, generally represented by reference numeral 43, having a poppet portion 44 for cooperation with a seat 44a formed on a ring 44b and a stem portion 45.
  • Seat 44:: may be formed on the rim of port 35 but use of ring 44b is preferred.
  • a ring 46 is fixed in a groove 47 around the inner periphery of the housing 30.
  • Several exit ports 49 are formed around the housing 30 to provide the path of communication to the suction well 5 for the liquid from the discharge passage 22.
  • a spring 50 Acting on the left-hand side of piston 41 and urging the poppet valve 43 to its open position is a spring 50 which reacts against the ring 46. Sto shoulders 51 are provided along the end of the housing 30 to limit the movement of the piston 41 as the poppet valve 43 is opened by the combined spring and fluid pressure force on the left-hand side of the poppet 44. The force acting on the right-hand side of piston 41 to elfect closing of the valve 43 is gained through controlled pressurization of the chamber 40, now to be explained.
  • a control duct 55 adapted for pressurizatiom'extends through the end of the housing 30 and communicates at one of its ends with the control chamber 40, as indicated in FIGURE 2.
  • the other end of the control duct 55 extends through the Wall of the pipe section 6 and terminates in a funnel-shaped sensor element 56.
  • the funnel-shaped sensor 56 has an opening 58 which receives the flow of liquid from the pump passage 23, since as will be remembered the pump elements 11 discharge liquid upwardly as indicated by the arrow 59.
  • the suction well Before starting the pumping system 1, the suction well is filled with a sufficient amount of liquid to submerge the intake Shirt 12. In accordance with this invention, it is not necessary to fill the suction manifold or piping 2 or to Vent any part of the suction system.
  • the liquid initially disposed in the suction well 5 is delivered to the discharge pipe 4 when the pump is started. As the liquid passes the dynamic pressure sensor 56 the poppet valve 43 closes the port 35, thus allowing the liquid to pass through the discharge passage 22 in the pipe 4 and out the main check valve 13.
  • the pumping of the liquid initially placed in the suction well 5 creates a vacuum in the upper portion of the well 5 causing new liquid to flow into the system through the suction pipe 2.
  • the poppet valve 43 is held closed by the liquid being pumped, and liquid continues to be pumped through the system 1 at full capacity as long as air is not introduced into the suction pipe 2.
  • a slug of air is introduced into the suction pipe 2
  • the suction by the pump element 11 is interrupted as previously discussed, and the flow or liquid thereto is stopped.
  • the automatic selfpriming feature of the system 1 is placed in motion. That is, when the how of liquid through the pump passage 23 to the discharge passage 22 is sufficiently reduced, the dynamic pressure factor in the control duct 55 and control chamber 4!?
  • the entire valve assembly 3 except for a remote sensor element 56 is located outside of the discharge passage so that there is no obstruction to fluid flow in the discharge passage 22.
  • a remote sensor allows me to vary the conditions under which actuation of the valve element 43 takes place.
  • the sensor 56 could be placed between a selected two of the pump elements 11 instead of downstream of the final pump element 11 in the discharge passage 22, as described, whereupon an earlier opening of the poppet d valve 43 would be effected upon loss of suction since the velocity factor in the upstream pump elements 11 would tend to go to zero first.
  • a selective type of actuation of the poppet valve of the invention is effected and the priming cycle is advantageously capable of being controlled, as desired.
  • the poppet valve type of construction of the present invention is simple in construction and does not require machining to close tolerances as in previous sliding type valves. More particularly, the use of a piston 41 with the O-ring sealing arrangment allows increased clearance between the moving parts of the valve assembly 3. The presence of such increased clearance is of substantial importance in the present design in view of the fact that water and other liquids which come incontact with the parts tend to deposit chemicals or other foreign matter which would impair the operation if it were not for the fact that suihcient clearance can be allowed between the parts to allow for such deposits without interfering with the sensitivity and rapid operation of the poppet type device.
  • FIGURES 3, 4, 5 and 6 there are illustrated other embodiments of the apparatus of the present invention wherein like reference numerals have been employed to refer to corresponding parts of the invention as portrayed in FIGURE 2.
  • the dynamic pressure factor is detected by increasing the velocity of the flowing liquid with a venturi tube device thus lowering the static pressure at a static pressure tap in the throat of the device to create a sucking action that operates the primer valve 3.
  • the funnel-shaped sensor 56 has additional structure that forms a throat section 60 and divergent section 61, which added combination converts the sensor 56 into a venturi tube or nozzle, generally designated by the reference numeral 62 for ease of description.
  • the sensing end of the control conduit 55 communicates with the throat section 6-9 of the venturi tube 62 so that the static pressure in said throat 60 is present in the conduit 55 and the control chamber 40.
  • this type of sensing device is capable of detecting the dynamic pressure in the upwardly flowing stream represented by the arrow 59 since the suction or the reduced static pressure in the conduit 55 is proportional to the velocity and thus the dynamic pressure factor /zpV of the fluid flowing through the venturi tube 62.
  • the spring 54 ⁇ represents an unbalanced force causing the poppet 44 to move left, as viewed in FIGURE 3, and the column of liquid in the discharge passage 22 escapes through the ports 35 and 49 to the suction well 5, as before.
  • the mounting flanges 32, 33 of the embodiment illustrated in FIGURE 3 incorporate a step portion 65, 66 to insure that the poppet 44 is free of the discharge passage and the liquid flowing therein at all times. In this way, it is insured that the valve assembly 3 does not in any substantial sense interfere with the free flow of discharge liquid, as in the embodiment of FIGURE 2.
  • a flanged venturi element is mounted in the pump discharge as shown.
  • the element 80 includes a venturi section 82 supported by webs 84 from an outer ring or flange S6.
  • the design is such that there is a divided flow pattern, part of which passes through the venturi throat 88 and the remainder flowing outside the venturi section 82 through passages 90.
  • a pitot tube 94 in the throat 88 of the venturi senses pressure drop and/or creates suction in valve chamber 40 thereby operating the suction type priming valve unit as illustrated in FIGURES 4 and 6.
  • the tube By turning the pitot tube 94 down or toward the oncoming stream, as illustrated in FIGURE 5, the tube will sense velocity through the venturi as a pressure increase and will operate the pressure type primer valve unit illustrated.
  • a pumping system comprising a pump, a discharge conduit defining a flow path for liquid from said pump, and at least one primer valve operatively connected to said discharge conduit, each primer valve comprising a valve housing positioned on the outside of said discharge conduit, a poppet element within said housing and movable between positions opening and closing a port provided in the side of said discharge conduit, said housing being provided with at least one vent port positioned to enable liquid flowing through said vent port to return to the suction side of said pump, means including a piston connected to said poppet element to define a closed chamber within said housing, sensor means positioned within said discharge conduit to detect the flow condition thereof, said sensor means at all times being in free communication with said port through said discharge conduit, a control duct connecting said sensor means to said closed chamber to establish a pressure within said closed chamber which is effective to maintain said poppet element in the closed position during normal pumping operation, and bias means to bias said poppet element towards its open position whereby upon termination of fluid flow through said discharge conduit the pressure at the port and the pressure within said chamber are substantially equal so
  • a pumping system comprising a pump, a discharge conduit defining a flow path for liquid from said pump, and at least one primer valve operatively connected to said discharge conduit,'each primer valve comprising a valve housing positioned on the outside of said discharge conduit, a poppet element within said housing and movable between positions opening and closing a port provided in the side of said discharge conduit, said housing being provided with at least one vent port positioned to enable liquid flowing through said vent port to return to the suction side of said pump, means including a piston connected to said poppet element to define a closed chamber within said housing, sensor means positioned within said discharge conduit to detect the flow condition thereof, a control duct connecting said sensor means to said closed chamber to establish a pressure within said closed chamher which is effective to maintain said poppet element in the closed position during normal pumping operation, and bias means to
  • Apparatus according to claim 3 further comprising a plurality of primer valves positioned on the outside of said discharge conduit, and said pump having a drive shaft having a portion thereof extending axially through said venturi element.
  • said funnel shaped element comprises a venturi tube having a throat section at its smaller end, said control duct being connected to said throat section.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
US418707A 1964-12-16 1964-12-16 Self-priming liquid pumping system and primer valve Expired - Lifetime US3370604A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
US418707A US3370604A (en) 1964-12-16 1964-12-16 Self-priming liquid pumping system and primer valve
GB52126/65A GB1130347A (en) 1964-12-16 1965-12-08 Self priming liquid pumping system
NO160876A NO125110B (hu) 1964-12-16 1965-12-11
DK643265AA DK137144B (da) 1964-12-16 1965-12-15 Selvansugende væskepumpeanlæg med en under indflydelse af strømningshastigheden automatisk virkende spædeventil.
FR42470A FR1462590A (fr) 1964-12-16 1965-12-15 Dispositif de pompage de liquides à auto-amorçage
SE16279/65A SE331423B (hu) 1964-12-16 1965-12-15
NL6516324A NL6516324A (hu) 1964-12-16 1965-12-15
BE673801D BE673801A (hu) 1964-12-16 1965-12-15
DE19651528722 DE1528722C3 (de) 1964-12-16 1965-12-16 Selbstansaugende Kreiselpumpe
ES0320812A ES320812A1 (es) 1964-12-16 1965-12-16 Perfeccionamientos en un sistema de bombeo de liquidos, constituido por una valvula cebadora y un accionador.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US418707A US3370604A (en) 1964-12-16 1964-12-16 Self-priming liquid pumping system and primer valve

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US3370604A true US3370604A (en) 1968-02-27

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US418707A Expired - Lifetime US3370604A (en) 1964-12-16 1964-12-16 Self-priming liquid pumping system and primer valve

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US (1) US3370604A (hu)
BE (1) BE673801A (hu)
DK (1) DK137144B (hu)
ES (1) ES320812A1 (hu)
FR (1) FR1462590A (hu)
GB (1) GB1130347A (hu)
NL (1) NL6516324A (hu)
NO (1) NO125110B (hu)
SE (1) SE331423B (hu)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3434430A (en) * 1967-04-18 1969-03-25 Worthington Corp Self-priming pump system with external actuating means
US3451417A (en) * 1966-06-10 1969-06-24 Hudson Eng Co Combination of relief pressure mechanism and valve
US3474735A (en) * 1967-05-24 1969-10-28 Samuel E Gilmore Air dumping control mechanism for self-priming pumps
US3481274A (en) * 1967-12-18 1969-12-02 Hudson Eng Co Differential pressure sensitive valve system for self-priming liquid-type pumps
US3575521A (en) * 1968-11-05 1971-04-20 Gorman Rupp Co Air release valve for self-priming centrifugal pump
US3586040A (en) * 1969-11-06 1971-06-22 Machinery Co Const Valve means
US3940058A (en) * 1974-10-07 1976-02-24 Norris Orlin R Steam generating system including means for reinitiating the operation of a steam bound boiler feed pump
US4255079A (en) * 1979-08-06 1981-03-10 Penco Division Of Hudson Engineering Company Self-priming system for pumps
US4493607A (en) * 1982-12-16 1985-01-15 Hudson Engineering Company Tee-type valve for self-priming pump system
US4494560A (en) * 1982-12-09 1985-01-22 Hudson Engineering Company Self-priming system for liquid pumps
US4515180A (en) * 1982-12-09 1985-05-07 Hudson Engineering Company Valve for self-priming pump system
US4521156A (en) * 1982-12-16 1985-06-04 Hudson Engineering Company Self-priming pump system having diaphragm-type flow sensor
GB2390119A (en) * 2002-04-12 2003-12-31 Baker Hughes Inc Priming mechanism for a submersible pump
US6682313B1 (en) * 2000-12-04 2004-01-27 Trident Emergency Products, Llc Compressed air powered pump priming system
US20060174157A1 (en) * 2004-11-05 2006-08-03 Barrall Geoffrey S Dynamically expandable and contractible fault-tolerant storage system with virtual hot spare
CN113532846A (zh) * 2021-09-14 2021-10-22 南通沃特力机械制造有限公司 一种组装后的泵体阀门的自动质检系统及方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111379887B (zh) * 2018-12-27 2024-02-09 青岛经济技术开发区海尔热水器有限公司 多功能针式阀、热泵热水器及其冷媒灌注方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1147401A (en) * 1912-09-04 1915-07-20 Gen Electric Regulation of boiler feed-pumps.
US1206385A (en) * 1913-12-03 1916-11-28 American Well Works Pump.
US2902940A (en) * 1953-05-12 1959-09-08 Atkinson Guy F Co Self-priming pumping system
US3228343A (en) * 1964-05-25 1966-01-11 U S Pumps Inc Self-priming pump
US3276384A (en) * 1964-08-31 1966-10-04 Worthington Corp Check and priming valve means for self-priming pumping system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1147401A (en) * 1912-09-04 1915-07-20 Gen Electric Regulation of boiler feed-pumps.
US1206385A (en) * 1913-12-03 1916-11-28 American Well Works Pump.
US2902940A (en) * 1953-05-12 1959-09-08 Atkinson Guy F Co Self-priming pumping system
US3228343A (en) * 1964-05-25 1966-01-11 U S Pumps Inc Self-priming pump
US3276384A (en) * 1964-08-31 1966-10-04 Worthington Corp Check and priming valve means for self-priming pumping system

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3451417A (en) * 1966-06-10 1969-06-24 Hudson Eng Co Combination of relief pressure mechanism and valve
US3434430A (en) * 1967-04-18 1969-03-25 Worthington Corp Self-priming pump system with external actuating means
US3474735A (en) * 1967-05-24 1969-10-28 Samuel E Gilmore Air dumping control mechanism for self-priming pumps
US3481274A (en) * 1967-12-18 1969-12-02 Hudson Eng Co Differential pressure sensitive valve system for self-priming liquid-type pumps
US3575521A (en) * 1968-11-05 1971-04-20 Gorman Rupp Co Air release valve for self-priming centrifugal pump
US3586040A (en) * 1969-11-06 1971-06-22 Machinery Co Const Valve means
US3940058A (en) * 1974-10-07 1976-02-24 Norris Orlin R Steam generating system including means for reinitiating the operation of a steam bound boiler feed pump
US4255079A (en) * 1979-08-06 1981-03-10 Penco Division Of Hudson Engineering Company Self-priming system for pumps
US4515180A (en) * 1982-12-09 1985-05-07 Hudson Engineering Company Valve for self-priming pump system
US4494560A (en) * 1982-12-09 1985-01-22 Hudson Engineering Company Self-priming system for liquid pumps
US4493607A (en) * 1982-12-16 1985-01-15 Hudson Engineering Company Tee-type valve for self-priming pump system
US4521156A (en) * 1982-12-16 1985-06-04 Hudson Engineering Company Self-priming pump system having diaphragm-type flow sensor
US6682313B1 (en) * 2000-12-04 2004-01-27 Trident Emergency Products, Llc Compressed air powered pump priming system
GB2390119A (en) * 2002-04-12 2003-12-31 Baker Hughes Inc Priming mechanism for a submersible pump
GB2390119B (en) * 2002-04-12 2005-08-31 Baker Hughes Inc Gas-lock re-prime device for submersible pumps
US20060174157A1 (en) * 2004-11-05 2006-08-03 Barrall Geoffrey S Dynamically expandable and contractible fault-tolerant storage system with virtual hot spare
CN113532846A (zh) * 2021-09-14 2021-10-22 南通沃特力机械制造有限公司 一种组装后的泵体阀门的自动质检系统及方法

Also Published As

Publication number Publication date
GB1130347A (en) 1968-10-16
SE331423B (hu) 1970-12-21
DE1528722A1 (de) 1970-03-19
NL6516324A (hu) 1966-06-17
NO125110B (hu) 1972-07-17
FR1462590A (fr) 1966-12-16
DK137144C (hu) 1978-06-26
DE1528722B2 (de) 1976-02-05
ES320812A1 (es) 1966-11-01
BE673801A (hu) 1966-06-15
DK137144B (da) 1978-01-23

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Effective date: 19840430