US20210071798A1 - Filling Device for a Pressurized Heating Circuit - Google Patents
Filling Device for a Pressurized Heating Circuit Download PDFInfo
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- US20210071798A1 US20210071798A1 US16/878,680 US202016878680A US2021071798A1 US 20210071798 A1 US20210071798 A1 US 20210071798A1 US 202016878680 A US202016878680 A US 202016878680A US 2021071798 A1 US2021071798 A1 US 2021071798A1
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- heating circuit
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Classifications
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- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/105—Closing devices introduced radially into the pipe or hose
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- 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
- F24D19/08—Arrangements for drainage, venting or aerating
- F24D19/082—Arrangements for drainage, venting or aerating for water heating systems
- F24D19/088—Draining arrangements
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- 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
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1083—Filling valves or arrangements for filling
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- 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
- F24D2220/0271—Valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Check Valves (AREA)
Abstract
A filling loop device is provided to facilitate filling of an installed pressurised heating circuit (2) including a boiler (furnace) (1) from a mains supply pipe (3). The device includes a dead-man valve (14) configured to normally close off a water channel provided by a hose (16). This ensures that the channel can only be opened when attended during charging. Conventionally the hose ordinarily used to charge the heating circuit should be removed after isolation valves are closed at the inlet (4) and outlet (6). However careless operatives have been found to have frequently left the hose in place with the isolation valves open causing serious damage to the boiler.
A second embodiment of the invention includes a pressure regulation valve (25) in the filling loop device to prevent careless operatives charging the system to excessive pressure.
A third embodiment provides a pressure regulation valve in the circuit, normally biased to a closed condition with a dead-man actuator to open the channel.
Description
- This application claims the benefit of U.S. patent application Ser. No. 15/533,663 (filed Jun. 7, 2017) under 35 U.S.C. § 120, which is a U.S. National Stage Patent Application of PCT International Patent Application Ser. No. PCT/GB2015/053739 (filed on Dec. 7, 2015) under 35 U.S.C. § 371, which claims priority to United Kingdom Patent Application Ser. No. 1421737.6 (filed on Dec. 8, 2014), which are all hereby incorporated by reference herein in their entireties.
- The present invention relates to filling devices for pressurised sealed central heating systems.
- As illustrated in prior art
FIGS. 1A and 1B a conventional pressurised heating systems includes a boiler orfurnace 1 in line withheating circuit pipe 2. The boiler needs to be filled from a pressurised water source such as a mainswater supply pipe 3. To do this the mainswater supply pipe 3 may be provided with aninlet valve 4 attached by a compression fitting. The inlet valve may be a stop or isolation valve. One inlet end of aplain hose 5 is connected by means of a BSP threaded coupling to theinlet valve 4. Theheating circuit pipe 2 is provided with a spur on to which anoutlet valve 6 is mounted by a compression coupling. The outlet valve is preferably a stop or isolation valve. The outlet end of thehose 5 is then connected to theoutlet valve 6 by a threaded coupling (step S1 inFIG. 1B ). - To charge the heating circuit the
valves pressure gauge 7 indicates a specified circuit pressure is reached (S1.3). A check valve may be provided, preferably in one or more of the isolation valves, to prevent leakage of water back out of the pressurised circuit. - When the circuit is charged according to the system specifications the
valves hose 5 removed (S1.5) to ensure that there is no connection between theheating circuit 2 andmains supply pipe 3. Thefilling hose 5 should be left in close proximity to theboiler 1 to provide for subsequent system charging. - It is a frequent occurrence that boilers are damaged by an inexperienced or careless user leaving the filling device (filling loop) in place and the
valves - The applicant perceives a demand for a filling device which may be able to:
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- reduce system installation and charging time by obviating the need to fit and remove the hose, and in many practical cases to replace or find the hose which is often lost.
- ensure that the mains water supply will be isolated from the heating circuit after charging however inexperienced or careless the operator is.
- ensure that the specified charging pressure is delivered on every charge.
- reliably and safely be operated by an unqualified operative such as the end user.
- The prior art devices to prevent this situation are complex devices which admit water into the heating circuit on a periodic basis to maintain the pressure.
- GB2450086 discloses an apparatus for controlling the pressure of a heating fluid within a central heating system or for controlling the flow of heating fluid into a central heating system. The apparatus comprises an inlet, for connection to a supply of heating fluid, and an outlet, for connection to a heating system. A pressure sensor is arranged to sense the heating fluid pressure within the central heating system. A flow sensor is arranged to sense the volume of heating fluid flowing between the inlet and the outlet. A flow control valve controls the flow of heating fluid from the inlet to the outlet. The flow control valve is operatively connected to the pressure sensor and is arranged to open when the sensed pressure falls below a first predetermined pressure and close when the sensed pressure rises above a second predetermined pressure. Alternatively, the flow control valve is operatively connected to the flow sensor and is arranged to close once a predetermined volume of heating fluid has flowed. A self-bleeding radiator valve comprising a filter arranged to inhibit particulate matter from interfering with the operation of the valve is disclosed. A filtration device for a central heating system, preferably comprising a magnetic particle filter, is also disclosed.
- This prior art device of GB2450086 provides a complex solution to the problem, comprising a pressure and/or flow sensor to control filling of the heating system by electronic means. As such it is over-complicated and costly for standard domestic use.
- US20060124078 discloses a water feed controller which can provide for the addition of a preset fixed amount of water to be added after a low water condition is removed. This system provides for a preset fixed amount of water to be added to a boiler above the amount which triggers the low water condition. This generally inhibits excess cycling from the boiler operating at its minimum safe water level as well as inhibiting overfilling of the boiler. Further, there is discussed a water feed controller which can measure the amount of water added over a prior predetermined period (such as 30 days) which serves as a floating window of time so that a leak or other condition resulting in overly frequent filling can be detected quickly.
- US20060124078 discloses: A water feed controller for a boiler, the controller comprising: electronics for monitoring the signal from a low water cut-off (LWCO); electronics for opening and closing a water path; and a processor; wherein when said electronics for monitoring detect a low water signal from said LWCO, said processor initiates opening of said water path to allow water to flow into said boiler; wherein said water path remains open until said LWCO ceases signalling a low water condition; and wherein said processor allows said water path to remain open after said LWCO ceases signalling said low water condition, so a preset fixed amount of water is added into said boiler after said LWCO ceases signalling said low water condition.
- Again, these are complex electronic devices, over-specified for standard domestic use and not useful or easy to retrofit to existing boiler installations.
- GB2204669 discloses: A fluid source e.g. a mains water supply is connected to a fluid user system such as a combination boiler by means including a non-return valve unit, a flow regulator and pipework for connecting the valve unit and flow regulator. The non return valve allows fluid flow to the fluid user system but prevents reverse fluid flow from the user system to the fluid source. The check valve unit may have an outlet portion permanently connected to the boiler and a conical inlet passage in which a flexible pipe may be held manually during top-up of the boiler. The unit may include two identical valve stems. This device is a standard filling loop device, without a fail-safe mechanism.
- According to the present invention there is provided a filling device for a pressurised heating system comprising: means defining a fluid passage having, an inlet port connectable to a fluid supply and an outlet port connectable to a heating system fluid circuit; and a dead-man valve interposed in the passage between the inlet port and the outlet port, said dead-man valve biased to a normally closed condition to shut off fluid flow through the channel in either direction when unattended, and manually operable to an open condition to permit fluid to flow from the inlet port to the outlet port.
- The fluid passage may be provided by a length of pipe, flexible hose or via a channel in a mono-block. The inlet and outlet ports may be provided by any conventional coupling including at least: threaded BSP and compression couplings.
- The dead-man valve is a valve which is biased to the closed condition and manually operable by an actuator to switch to the open condition. Consequently on releasing the actuator the valve closes. Therefore the valve cannot be left unattended in an open condition. A preferred version of the dead-man valve has a pushbutton actuator biased by a spring to the closed condition. The button must be held in the depressed condition to enable fluid to flow through the push button valve.
- A push button valve may be vulnerable to jamming open by abusive users, for example by wrapping with tape, consequently actuators such as a spring biased twist grip or other less easily jammed configurations may be preferred.
- To ensure there is no backflow from the boiler circuit to the mains water, a one way or check valve is connected such that flow from the inlet to the outlet connector is allowed while the reverse flow is prevented. Single check valves may be vulnerable to reverse flow leakage to prevent which a double check valve may be provided.
- A second isolation valve may be connected to the check valve.
- A check valve and an isolation valve may be provided in the same housing.
- In some embodiments the device comprises, connected in order along the flow pathway: a 15 mm inlet compression to 8 mm ball valve, an 8 mm push button water valve, a 15 mm to 8 mm adapter, a 15 mm flexible filling link comprising a metal braided hose and a 15 mm double check ball valve.
- In this way the device provides a means to fill a pressurised heating circuit from a pressurised water source such as a mains water supply, the device being connectable in place of a standard filling loop as known in the art. The use of the push button valve in the fluid pathway means that it is impossible to leave the filling loop in place and open, so avoiding accidental damage to the heating boiler.
- It will be understood that the flexible tubing portion may have a range of lengths to suit the configuration of the boiler installation, and that the connector types are not limited to any specific size and the device may be produced with chosen connector sizes to suit the installation.
- The device can also include a pressure regulator pre-set to deliver fluid to the outlet at a pressure compatible with the operation of the boiler. This facilitates use by non-technical untrained or sight disabled users who may misread the pressure gauge and charge the heating system to excessive or inadequate pressure.
- Embodiments of a filling device for a pressurised heating circuit constructed in accordance with the present invention, will now be described, by way of example only, with reference to the accompanying illustrative drawings, in which:
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FIGS. 1A and 1B illustrate conventional pressurized heating systems including a boiler or furnace in line with a heating circuit pipe. -
FIG. 2A shows a SW isometric view of a first embodiment of the device installed in a part of a pressurised heating circuit including a boiler; -
FIG. 2B is an exploded plan view of the filling device ofFIG. 2A ; -
FIG. 2C is a sectional detail of a first variant of a dead-man valve used in the first embodiment; -
FIG. 2D is a flow chart showing the new process for using the first embodiment; -
FIG. 3A is a SW isometric view of a second embodiment of the device installed in a part of a pressurised heating circuit including a boiler; -
FIG. 3B is an enlarged detail side elevation of the filling device of the second embodiment; -
FIG. 3C is a further enlarged sectional elevation through the dead-man valve of the second embodiment; -
FIG. 3D is a flowchart of the process of using the second embodiment, -
FIG. 4A shows an isometric view of a third embodiment of the invention wherein a dead-man valve is integrated with a regulator valve; -
FIG. 4B shows a plan vie of the third embodiment in a closed condition; -
FIG. 4C shows a sectional plan view throughFIG. 4B ; -
FIG. 4D shows a plan view of the third embodiment in the open condition for charging the heating circuit; -
FIG. 4E shows a sectional plan view ofFIG. 4D . - Features common to the prior art of
FIG. 1 are referenced with the same numerals. ThusFIG. 2A shows a boiler orfurnace 1 plumbed into a heating circuit to circulate hot water through a pressurisedheating circuit pipe 2. - An
inlet valve 4 is coupled to a terminus of themains water pipe 3 by means of aninlet connector 10. In this case theinlet connector 10 is a conventional compression coupling; however other known forms of coupling including press fit, cement or solder may be employed. Thecoupling 10 couples anisolation valve 12 to the end of themains water pipe 3. - A dead man valve is provided by a
push button valve 14 configured to open the fluid flow pathway when thepush button 15 is pushed and thereby displaces a spool against a bias to open a passage through the valve. When the button is released the bias displaces the spool and button to close the fluid passage. In the embodiment shown thepush button valve 14 has an upstream port adapted to be coupled to a downstream port of theisolation valve 12 by means of a BSP threaded coupling. - A
downstream port 14 d of thepush button valve 14 is coupled to a flexible tubing portion (hose) 16 to provide fluid communication with theoutlet valve 6. Theoutlet valve 6 has ahousing 24 and includes anisolation valve 18 which includes acheck valve 22, connected such that flow from theinlet 4 to the outlet valve is allowed while reverse flow is prevented. Theoutlet valve 6 is coupled to a spur off the heating circuit pipe by means of a compressioncoupling outlet connector 20. In some embodiments the check valve in theoutlet valve 6 is a double check valve to add reliability. -
FIG. 2C shows a sectional detail of thepush button valve 14 with the button depressed. Thepush button valve 14 has acasing 14 a with afluid passage 14 b communicating a female threadedinlet port 14 c andoutlet port 14 d. Thepassage 14 b is intersected by aspool chamber 14 e containing aspool 14 f. Thespool 14 f is in this case cylindrical. Anti-rotating means (not shown) may be provided to prevent the spool from rotating around its axis. Such means may include a tongued washer, located in nut 15 a and engaging a groove in the stem 15 b of the push button. - The anti-rotating means ensures that a through
passage 14 g extending diametrically through thespool 14 f is aligned with thepassage 14 b to facilitate the passage of water through the valve when the pushbutton is depressed. Acompression spring 14 k is arranged to urge thespool 14 f up into a condition where a lower part 141 of the spool obstructs thepassage 14 b as can be seen inFIG. 3C . - An “O” ring 14 m′ encircles the spool above the upper part, a middle “O” ring 14 m″ encircles the spool between the upper and lower part and a lower “O” ring encircles the spool at the bottom of the lower part. The “O” rings provide a fluid sealing bearing surface for the spool in the cylindrical spool chamber.
FIG. 2D is a flow chart showing the method of using the device of the first embodiment. Theinlet valve 4 andoutlet valve 6 will be installed with the heating system and will remain in place on themains supply 3 and heating circuit spur 2 a as in the conventional prior art arrangement. - In step 2.1 the fill loop device is coupled between the inlet and
outlet valves isolation valves mains pipe 3 to the heating circuit spur 2 a. This pressurises theheating circuit 2 and the pressure is read at step 2.4 from thepressure gauge 7 by the user until a manufacturer specified pressure is reached. When the specified pressure is reached the press button valve is released at step 2.5. Theisolation valves mm ball valve 12, an 8 mm pushbutton water valve 14, a 15 mm to 8mm adapter 26, a 15 mm flexible filling link comprising ametal braided hose 16 and a 15 mm combined double check andball valve 24. - The second embodiment of the fill loop device is generally similar to the first and corresponding components are identified with similar numerals. Accordingly only the differences will be described. As can best be seen in
FIGS. 3A and 3B the filling loop device includes a governor orpressure regulating valve 25 in series with thepress button valve 14. Thepressure regulating valve 25 is set to limit the maximum water supply pressure at theoutlet 6 of the filling loop device to correspond to the specified maximum pressure for theboiler 1. As a result an inexperienced or untrained user cannot over pressurise the system and thereby cause damage. - A further modification of the second embodiment is most readily apparent from
FIG. 3C . This addresses the issue of theisolation valve 18 being incorrectly left open and permitting backflow to thepress valve 14 even against thecheck valve 22. Against this eventuality adrain passage 14 k is formed in the lower part of the spool and arranged to align with the outlet port. Thedrain passage 14 k is isolated from the through passage by a barrier 14 p, and the middle “O” ring 14 m″. The drain passage communicates with a lower part of the spool chamber and hence to adrain port 14 j is provided in the body of thepress valve 14. The drain port is conveniently formed by drilling a bore 14 m through the base 14 n of the spool chamber. Since the lower part of the spool chamber is then open to air this creates an air gap between the inlet port and the outlet port. A hollow nipple 14 o may be formed on the spool chamber base in communication with the bore 14 m to which a hose may be attached. This allows water flowing back into the press valve (from the right inFIG. 3C , to flow through adrain port 14 k formed in a bottom portion of thespool 14 f and to drain out through thedrain port 14 j. -
FIG. 3C illustrates an alternative embodiment in which thespring 14 e′ shown in ghosted lines, is located around the press button stem to act between the press button and the valve nut 15 b. - Referring to
FIG. 4A the dead-man valve and pressure regulator valve are combined in a singleunitary structure 30 which has aninlet port 31 andoutlet port 32. Theinlet port 31 may be directly connected to themains water supply 3, preferably via an isolation check valve such as 4 in the previous embodiments, similarly theoutlet port 32 can be directly connected to the heating circuit via the an isolation check valve such as previously described at 6. Theregulator valve 30 has a pressure setscrew 33 to set the maximum pass pressure for the valve and will commonly be pre-set according to the manufacturers specifications for the heating system. The press button of the previous embodiments is replaced by arotatable knob 34. - The
inlet port 31 communicates with afirst chamber 35. This is closed by anannular bulkhead 36. The lumen 37 of thebulkhead 36 is closed by apiston valve seat 38 which can move in the vertical axial direction of the figures. Fluid sealing is achieved via anO ring seal 39, and thepiston valve seat 38 is normally urged towards a closed and sealed condition, as shown inFIG. 4C by the action of a piston valveseat coil spring 40 which acts between the piston valve seat and bulkhead. This action presses the piston valve seat to sealingly engage a poppet orneedle valve 41. - The
poppet valve 41 is in turn urged up to engage thepiston valve seat 38 by the action of a poppetvalve compression spring 42 acting between the valve casing and thepoppet valve 41. Acam 43 is mounted on ashaft 44 which is sealingly journaled to extend through the casing to irottatably engagerotary knob 34. Thecam 43 may be constrained to rotate no more than the positions illustrated in order to retain thepiston valve seat 38 against the action of the pistonvalve seat spring 40. Thus in the stopped condition shown inFIG. 4c no water can flow from theinlet chamber 35 to anoutlet chamber 45 above the bulkhead. - As with conventional regulator valves, the
outlet chamber 45 is sealed by apiston 46 which is connected to thepoppet valve 41 by a con-rod 47. Thepiston 47 is urged down into the outlet chamber by the action of apiston spring 48 preloaded by theset screw 33. - To charge the heating circuit or boiler the
knob 34 is rotated to the position shown inFIG. 4D . This rotates thecam 41 to press thepiston valve seat 38 up against the action of thespring 40. Water can now flow between thepoppet valve 41 and thepiston valve seat 38 into theoutlet chamber 45 and so to theoutlet 32. - If the pressure in the outlet chamber rises excessively the force applied to the
piston 46 causes thepiston 46 to rise carrying the poppet valve towards thepiston valve seat 38 and causing the pressure in theoutlet chamber 45 to drop. - If the
knob 34 is released the pistonvalve seat spring 40 presses the piston valve seat down against thecam 41. The rotary axis of thecam 41 is arranged offset such that this induces a moment arm which rotates the cam back towards the closed condition. Thus the dead-man regulator valve cannot be left open unattended. - In a further variant of third embodiment check valves may be installed in the inlet and/or
outlets - The operation of the third embodiment is substantially similar to the operation of the second embodiment.
- It will be appreciated by the skilled person that while the filling loop device has been developed mainly for retrofit to existing pressurised boiler heating installation, it may be integrated into a boiler housing at manufacture, especially in the case of the second or third embodiments.
- It will be understood that any features described in relation to any one embodiment may where reasonable, ie technically feasible, be combined with any other described embodiments.
- The invention may be further defined by the following clauses:
- A filling device for a pressurised heating circuit comprising the following components connected in series to define a fluid flow path through them:
- an inlet connector,
- an inlet isolation valve,
- a push button valve configured to open the fluid flow pathway when the button is pushed and to close it when the button is released,
- a flexible tubing portion,
- a check valve, connected such that flow from the inlet connector to an outlet connector is allowed while the reverse flow is prevented, and
- an outlet connector.
- A device according to the immediately preceding paragraph wherein the check valve is a double check valve.
- A device according to either of the two immediately preceding paragraphs comprising a second isolation valve connected to the check valve.
- A device according to any one of the three preceding paragraphs wherein a check valve and an isolation valve are provided in the same housing.
Claims (18)
1. A filling loop device for a pressurized heating system comprising:
means defining a fluid passage having, an inlet port connectable to a fluid supply and an outlet port connectable to a heating system fluid circuit; and
a dead man valve interposed in the passage between the inlet port and the outlet port, said dead man valve biased to a normally closed condition to shut off fluid flow through the channel in either direction when unattended, and manually operable to an open condition to permit fluid to flow from the inlet port to the outlet port;
a casing (14 a) having; a fluid passage (14 b) with an inlet port and an outlet port and, a spool chamber (14 e);
a spool (14 f) slidably housed in the spool chamber (14 e), said spool including a through passage (14 g) capable of communicating the inlet port and outlet port for fluid flow therebetween, and
bias means to urge the spool so that a lower part of the spool obstructs the passage, and
a drain passage (14 k) formed in the lower part of the spool (14 f) and communicable between the outlet port and a drain port (14 j) formed in the lower part of the spool chamber (14 e).
2. A device according to claim 1 comprising a pressure regulator valve (25) pre-set to prevent excess pressurisation of a heating system.
3. A device according to claim 1 or claim 2 wherein the bias means comprises a spring (14 e) to spring bias the spool to close a fluid passage through the valve and a manual actuator operable to displace the spool in opposition to the spring force while manually attended.
4. A device according to claim 3 wherein the actuator comprises a press button (15).
5. A device according to any of claims 1 -4 wherein the drain port (14 k) is formed in a base of the spool chamber 14 e.
6. A device according to any one of claims 1 -5 wherein the drain port (14 k) is provided with a hose coupling.
7. A device according to claim 6 wherein the hose coupling is a nipple (14 o).
8. A device according to any preceding claim wherein the drain passage (14 k) is isolated from the through passage (14 g).
9. A filling loop device for a pressurized heating system comprising:
means defining a fluid passage having, an inlet port (31) connectable to a fluid supply and an outlet port (32) connectable to a heating system fluid circuit; and
a dead man valve interposed in the passage between the inlet port and the outlet port, said dead man valve biased to a normally closed condition to shut off fluid flow through the channel in either direction when unattended, and manually operable to an open condition to permit fluid to flow from the inlet port (31) to the outlet port (32);
wherein said deadman valve is provided by a pressure regulator valve (30) pre-set to prevent excess pressurisation of a heating system;
said pressure regulator valve having means biased to normally close a fluid passage (38) through the regulator valve and an actuator (34) manually operable against the bias to open the fluid passage.
10. A device according to claim 9 wherein the regulator valve comprises a displaceably mounted piston valve seat spring biased to close a fluid passage formed between the piston valve seat and a poppet valve (39).
11. A device according to claim 9 or claim 10 comprising a cam (43) rotatable from a closed condition to an open condition, where in the open condition the cam acts against the piston valve seat (38) to open the fluid passage between the poppet valve and the piston valve seat (38).
12. A device according to claim 11 wherein the rotary axis of the cam (43) is offset such that the spring force always displaces the cam towards the closed condition.
13. A device according to claim 9 or 10 comprising a shaft (44) sealingly journaled through a casing of the dead-man regulator valve to couple with a manual actuator provided by a knob (34).
14. A boiler in combination with a filling loop device according to any one of the preceding claims.
15. A method of charging a pressurized boiler and heating circuit comprising the steps of:
providing a fluid channel between a mains water supply and the pressurized heating circuit, said fluid channel including a dead-man shut off valve having a manually operable actuator configured to close the channel when not manually actuated;
manually actuating the dead-man valve to allow water to flow from the mains supply to the heating circuit until the heating circuit reaches a specified operating pressure;
releasing the dead-man valve actuator to shut off the channel.
16. A method according to claim 15 comprising leaving the fluid channel in place after charging the pressurized boiler and heating circuit.
17. A method according to one of claim 15 or 16 comprising providing a one way check valve in the channel to prevent backflow from the heating circuit to the mains supply.
18. A method according to any one of claims 15 to 17 comprising providing a pressure regulation valve in the channel pre-set to regulate the maximum pressure of water deliverable to the heating circuit in order to prevent charging the heating circuit to a damaging excessive pressure.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/878,680 US20210071798A1 (en) | 2014-12-08 | 2020-05-20 | Filling Device for a Pressurized Heating Circuit |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1421737.6A GB2527621B (en) | 2014-06-25 | 2014-12-08 | A filling loop device for a pressurised heating circuit |
GB1421737.6 | 2014-12-08 | ||
PCT/GB2015/053739 WO2016092279A1 (en) | 2014-12-08 | 2015-12-07 | A filling device for a pressurised heating circuit |
US201715533663A | 2017-06-07 | 2017-06-07 | |
US16/878,680 US20210071798A1 (en) | 2014-12-08 | 2020-05-20 | Filling Device for a Pressurized Heating Circuit |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/533,663 Continuation US10883644B2 (en) | 2014-12-08 | 2015-12-07 | Filling device for a pressurised heating circuit |
PCT/GB2015/053739 Continuation WO2016092279A1 (en) | 2014-06-25 | 2015-12-07 | A filling device for a pressurised heating circuit |
Publications (1)
Publication Number | Publication Date |
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US20210071798A1 true US20210071798A1 (en) | 2021-03-11 |
Family
ID=54834765
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/533,663 Active 2036-05-29 US10883644B2 (en) | 2014-12-08 | 2015-12-07 | Filling device for a pressurised heating circuit |
US16/878,680 Abandoned US20210071798A1 (en) | 2014-12-08 | 2020-05-20 | Filling Device for a Pressurized Heating Circuit |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/533,663 Active 2036-05-29 US10883644B2 (en) | 2014-12-08 | 2015-12-07 | Filling device for a pressurised heating circuit |
Country Status (2)
Country | Link |
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US (2) | US10883644B2 (en) |
WO (1) | WO2016092279A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111140682B (en) * | 2018-11-06 | 2021-08-20 | 宁波方太厨具有限公司 | Automatic water supply valve for heating loop |
IT201900006475A1 (en) | 2019-05-02 | 2020-11-02 | Andrea Rigamonti | FILLING DEVICE |
CN113932153A (en) * | 2021-09-28 | 2022-01-14 | 中核核电运行管理有限公司 | Solution method for 'dead pipe section boiler effect' of nuclear power plant |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3089513A (en) * | 1960-12-01 | 1963-05-14 | Jr Chester Howard Kirk | Combination fill valve and expansion tank |
US3768518A (en) * | 1971-03-01 | 1973-10-30 | V Roth | Fluid transfer valve |
US4004610A (en) * | 1975-04-14 | 1977-01-25 | B.W.B. Controls, Inc. | Line control |
US4193553A (en) * | 1977-11-07 | 1980-03-18 | Keffer Francis C | Hand-held shower head |
US4267861A (en) * | 1979-11-05 | 1981-05-19 | Rk Industries | Plural modular fluid transfer valves |
GB2204669A (en) | 1987-04-27 | 1988-11-16 | Myco Engineering Limited | Water connection device |
WO1996006308A1 (en) | 1994-08-23 | 1996-02-29 | Euro Innovations Limited | A valve |
WO1997045680A1 (en) | 1996-05-25 | 1997-12-04 | Euro Innovations Limited | Improvements in and relating to a valve |
US7000898B2 (en) * | 2003-12-09 | 2006-02-21 | Howard Tak Su Lim | Vertical shut-off valve |
CA2663133C (en) | 2004-12-09 | 2011-09-06 | Taco, Inc. | Water feed controller for a boiler |
GB2450086A (en) | 2007-06-11 | 2008-12-17 | Andrew Nevin | Central heating systems |
CN102482961B (en) * | 2009-09-14 | 2014-01-29 | 本田技研工业株式会社 | Valve gear of internal combustion engine |
DE102011106115A1 (en) * | 2011-06-09 | 2012-12-13 | Honeywell Technologies Sarl | Device for handling a liquid medium |
CA2748553A1 (en) * | 2011-07-31 | 2013-01-31 | Michel Pelletier | The water saver (+) |
US20160195190A1 (en) * | 2014-12-04 | 2016-07-07 | Phuong Taylor Nguyen | Media Control Valve |
-
2015
- 2015-12-07 US US15/533,663 patent/US10883644B2/en active Active
- 2015-12-07 WO PCT/GB2015/053739 patent/WO2016092279A1/en active Application Filing
-
2020
- 2020-05-20 US US16/878,680 patent/US20210071798A1/en not_active Abandoned
Also Published As
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WO2016092279A1 (en) | 2016-06-16 |
US10883644B2 (en) | 2021-01-05 |
US20170343146A1 (en) | 2017-11-30 |
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