GB2221283A - A control valve assembly - Google Patents
A control valve assembly Download PDFInfo
- Publication number
- GB2221283A GB2221283A GB8916500A GB8916500A GB2221283A GB 2221283 A GB2221283 A GB 2221283A GB 8916500 A GB8916500 A GB 8916500A GB 8916500 A GB8916500 A GB 8916500A GB 2221283 A GB2221283 A GB 2221283A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- seating member
- primary chamber
- control valve
- valve assembly
- 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.)
- Withdrawn
Links
- 239000012530 fluid Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 12
- 239000004033 plastic Substances 0.000 claims description 7
- 229920003023 plastic Polymers 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 30
- 238000010438 heat treatment Methods 0.000 abstract description 17
- 239000000919 ceramic Substances 0.000 description 4
- 238000007654 immersion Methods 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 238000003287 bathing Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000007659 motor function Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/072—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with pivoted closure members
- F16K11/074—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with pivoted closure members with flat sealing faces
-
- 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
- F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
Landscapes
- 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)
- Multiple-Way Valves (AREA)
Abstract
A fluid flow control valve assembly includes a casing 2 containing a primary chamber 16 and two separated secondary chambers 26 and 28. A seating member 14 separates the primary chamber 16 from the secondary chambers 26 and 28, and a valve member 18 is rotatably connected to the seating member 14 by a control shaft 20. Two apertures 30 and 32 extend through the seating member 14 to connect the primary chamber 16 with the secondary chambers 26 and 28 respectively. An inlet port (4) and outlet ports 8 and 10 communicate with their associated primary chamber 16 and secondary chambers 26 and 28 respectively. These ports (4), 8 and 10 are connected respectively to a heating boiler, a central heating flow circuit, and a hot water cylinder. The shaft 20 may be housed in a sleeve 40 which extends from the seating member 14. In operation, the valve member 18 is rotated to close either one of the apertures 30 and 32 or to leave open both these apertures thereby passing hot water to the central heating system and/or the hot water supply. <IMAGE>
Description
A CONTROL VALVE ASSEMBLY
The present invention relates to a valve for controlling the flow of fluid. Such valves are particularly suitable for controlling the flow of fluid into one or more pre-selected flow paths.
One example of the use of the valve of the invention is in the control of hot water from a boiler into a hot water system and/or central heating system. The hot water system is used to provide a supply of readily available hot water for any required purpose, such as for example washing or bathing. This hot water is generally obtained from an immersion tank which is heated indirectly via an internal heating tube carrying water heated by the boiler. This indirect heating reduces the risk of contamination of the hot water.
According to one aspect of the present invention there is provided a fluid flow control valve assembly comprising a casing containing a primary chamber and a plurality of separated secondary chambers, a valve seating member separating said secondary chambers from the primary chambers, a plurality of apertures extending through said seating member, each aperture connecting said primary chamber to only an associated one of said secondary chambers, a plurality of ports extending through said casing wall, each port communicating only with an associated one of said chambers, and a valve member movable relative to said valve seating member to close at least partly, at least one of said apertures.
According to another aspect of the present invention there is provided a fluid flow control valve assembly comprising a casing having a primary chamber and at least two separated secondary chambers, a valve seating member separating said primary chamber from both or all of said secondary chambers, a plurality of apertures extending through said seating member, each aperture connecting said primary chamber with only an associated one of said secondary chambers, a plurality of ports extending through said casing wall, each port communicating only with an associated one of said chambers, and a valve member movable relative to the valve seating member to close at least partly at least one of said apertures.
The contacting surfaces of the valve member and the valve seating member may be formed of an alumina oxide based material such as ceramic or a suitable metal or plastics material.
In a preferred arrangement, the valve member may be rotatable with respect to a circular valve seating member.
Two embodiments of the invention will now be described by way of example with reference to the accompanying illustrative drawings in which:
Fig. 1 is a side elevation in section along the line I-I of Fig. 2 of a first embodiment of the invention;
Fig. 2 is a plan view from above of the first embodiment along the line II-II of Fig. 1;
Figs. 3 and 4 are plan views from above of the first embodiment with different ones of the two apertures closed; and
Fig. 5 is a side elevation in section of a second embodiment of the invention.
Referring to Figs. 1 to 4, a water flow control valve for a central heating and hot water system includes a casing 2 of circular transverse cross-section made of a suitable plastics material. This casing 2 may be a machined hot brass stamping or a machined casting.
A circular seating member 14 rests on an annular step in the casing side wall 12 to separate a primary chamber 16 from the remainder of the casing interior. A sector-shaped valve member 18 is rotatably connected to the seating member 14 by means of a central control shaft 20. Two diametrically opposed separating members 22 and 24 extend radially outwardly from the control shaft 20 to divide the part of the casing 2 above the seating member 14 into two secondary chambers 26 and 28. The control shaft 20 is made of a suitable metal, such as brass, or of a suitable plastics material.
The casing 2 has a central inlet port 4 in its circular base 6, leading into the primary chamber 16, and two diametrically opposed outlet ports 8 and 10 in its tubular side wall 12 leading into their associated secondary chambers 26 and 28.
The secondary chamber 26 and port 8 are intended for directing water into a central heating system, and the secondary chamber 28 and the port 10 are intended for directing water to a hot water supply.
Two sector-shaped apertures 30 and 32 extend through the seating member 14 to connect the primary chamber 16 with the secondary chambers 26 and 28 respectively. The aperture 30 leading to the central heating secondary chamber 26 is larger than the aperture 32 to ensure that the frictional resistance through the central heating part of the valve is less than the frictional resistance through the hot water supply valve part. This is required because the central heating circuit in general has greater frictional losses than the hot water supply.
This arises because the central heating circuit has radiators and pipework whereas the hot water supply has only the internal coil and pipework. Therefore less water needs to be diverted through the hot water supply, and this is assisted by the use of a higher resistance through the hot water supply valve part, i.e. the smaller aperture 32. It will be seen from Figs. 2 to 4 that the valve member 18 is dimensioned so that it can close either one of the apertures 30 and 32 either partly or completely, or as shown in Fig. 2 it can leave both apertures almost completely open. The valve member 18 can leave both apertures partially open if the apertures 30 and 32 are moved closer together. The casing 2 is closed by means of a circular lid 36 which is recessed so as to sit on the upper part of the casing wall 12.The valve member 18 is retained in contact with the seating member 14 by means of a circlip 38 which is located in a circular recess in the control shaft 20 to abut the top of the casing lid 36.
The contacting upper surface of the valve member 18 and the lower surface of the seating member 14 may be made of an alumina oxide based material such as ceramic or a suitable metal or plastics material. It is preferred that the surfaces are made of an alumina oxide based ceramic which is polished to provide closely mating surfaces on the valve member 18 and the seating member 14. Advantages of an alumina oxide based material such as ceramic are that it is chemically inert, it is hard and wear resistant and is able to sustain an effective seal.
The valve member 18 may be spring-biased into contact with the seating member 14 to improve the quality of the seal. It is conventional for the valve member 18 and the valve seating member 14 to be made from a homogeneous material.
In operation, the inlet port 4 is connected to the outlet of a heating boiler, the outlet port 8 is connected to the central heating flow circuit, and the outlet port 10 is connected to the indirect immersion cylinder which provides hot water to hot water taps in a building.
When it is desired to provide hot water for both the central heating system and the hot water supply, the control shaft 20 is rotated to locate the valve member 18 in the "open" position illustrated in Fig. 2. When it is required to deliver hot water only to the hot water supply system the valve member 18 is located in the position illustrated in Fig. 3 to close the aperture 30.
When required to deliver hot water only to the central heating system the valve member 18 is located in the position illustrated in Fig. 4 closing the aperture 32.
The control shaft 20 is rotated by an electric motor, and if desired a cam may be provided on the upper part of the control shaf 20 to operate a micro-switch to control a function of the motor. Examples of motor functions that can be controlled by such a micro-switch are switching the motor on or off or reversing its direction of rotation.
The electric motor can be controlled by two thermostats, one being used to sense the temperature of the hot water supply and generally fitted to the hot water immersion tank. The other thermostat is used to sense the central heating requirements, and is generally a room thermostat.
Fig. 5 illustrates a second embodiment of the invention which is substantially similar in construction to the embodiments of Figs. 1 to 4 and operates on the same principle. For clarity, corresponding components of the embodiments of Figs. 1 to 4 and of Fig. 5 have been given the same reference numerals.
The second embodiment includes a tubular mounting 40, which may be made of a suitable metal or plastics material. The seating member 14 is a circular disc of ceramic material moulded to one end of the tubular mounting 40. The upper portion of this tubular mounting 40 makes a liquid tight seal with a recessed central portion of the casing lid 36 by means of a circlip 44 and an O-ring 46. The inner wall of the tubular mounting 40 above a step 42 defines with the control shaft 20 a tubular space 48. A compression spring 50 extends between the upper part of the step 42 and a collar 52 on the control shaft 20 so as to bias upwardly the control shaft 20 to maintain an efficient seal between the valve member 18 and the seating member 14. If the tubular mounting 40 is made of a plastics material, it may be injection moulded.
The advantage of this tubular mounting 40 is that it reduces liquid leakage where the control shaft 20 passes through the seating member 14. It is found that liquid seeping between the valve member 18 and the control member 20 tends to pass into the tubular space 48 rather than into the closed secondary chambers.
Claims (11)
1. A fluid flow control valve assembly comprising a casing containing a primary chamber and a plurality of separated secondary chambers, a valve seating member separating said secondary chambers from the primary chamber, a plurality of apertures extending through said seating member, each aperture connecting said primary chamber to only an associated one of said secondary chambers, a plurality of ports extending through said casing wall, each port communicating only with an associated one of said chambers, and a valve member moveable relative to said valve seating member to close at least partly, at least one of said apertures.
2. A fluid flow control valve assembly comprising a casing having a primary chamber and at least two separated secondary chambers, a valve seating member separating said primary chamber from both or all of the said secondary chambers, a plurality of apertures extending through said seating member, each aperture connecting said primary chamber with only an associated one of said secondary chambers, a plurality of ports extending through said casing wall, each port communicating only with an associated one of said chambers, and a valve member moveable relative to said valve seating member to close at least partly, at least one of said apertures.
3. A control valve assembly as claimed in claim 1 or claim 2 wherein the valve member is rotatable relative to said valve seating member to close at least partly, at least one of said apertures.
4. A control valve assembly as claimed in any preceding claim, wherein the valve member is sector shaped.
5. A control valve assembly as claimed in any preceding claim wherein the valve member is spring-biased into contact with the valve seating member.
6. A control valve assembly as claimed in any preceding claim wherein the contacting surfaces of the valve member and the valve seating member are formed of a suitable metal.
7. A control valve assembly as claimed in any one of claims 1 to 5 wherein the contacting surfaces of the valve and the valve seating member are formed of a suitable plastics material.
8. A control valve assembly as claimed in any one of claims 1 to 5 wherein the contacting surfaces of the valve member and the valve seating member are formed of an alumina oxide based material.
9. A control valve assembly as claimed in claim 4 wherein the valve member is rotatable by a control shaft extending from the valve member through the casing lid, and wherein a receptable for fluid seeping between the valve member and the valve seating member is defined by the control shaft and a tubular member extending from the seating member to make a liquid tight fit with the casing lid.
10. A control valve assembly as claimed in claim 8 wherein the contacting surfaces of the valve member and the valve seating member are formed of a ceramic material.
11. A fluid flow control valve assembly substantially as herein described and shown in the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB888817504A GB8817504D0 (en) | 1988-07-22 | 1988-07-22 | Control valve assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8916500D0 GB8916500D0 (en) | 1989-09-06 |
| GB2221283A true GB2221283A (en) | 1990-01-31 |
Family
ID=10640943
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB888817504A Pending GB8817504D0 (en) | 1988-07-22 | 1988-07-22 | Control valve assembly |
| GB8916500A Withdrawn GB2221283A (en) | 1988-07-22 | 1989-07-19 | A control valve assembly |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB888817504A Pending GB8817504D0 (en) | 1988-07-22 | 1988-07-22 | Control valve assembly |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB8817504D0 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2669405A1 (en) * | 1990-11-19 | 1992-05-22 | Perge Investissement | Apparatus and method for controlling the temperature in a heating installation and heating installation incorporating such an apparatus |
| EP0685624A3 (en) * | 1994-06-04 | 1997-01-15 | Camco Drilling Group Ltd | A modulated bias unit for rotary drilling. |
| WO2003044408A1 (en) * | 2001-11-23 | 2003-05-30 | Alco Corporation | Diverter for changing flow routine in boiler |
| WO2005059415A1 (en) * | 2003-12-16 | 2005-06-30 | L'air Liquide Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude | System for dividing a main gas stream into several complementary gas streams |
| US10000289B2 (en) | 2012-02-02 | 2018-06-19 | Senior Ip Gmbh | Temperature control gasper apparatus |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB649966A (en) * | 1947-06-16 | 1951-02-07 | Permutit Co Ltd | Improvements relating to rotary multiport valves |
| GB679590A (en) * | 1949-10-28 | 1952-09-17 | Charles Victor Rowell | Improvements in liquid mixing valves |
| US3613731A (en) * | 1970-06-12 | 1971-10-19 | Aquamatic Inc | Multiport valve |
| GB1451806A (en) * | 1972-11-09 | 1976-10-06 | Purex Corp | Filter devices for the filtration of swimming pool water |
| GB2047852A (en) * | 1979-04-28 | 1980-12-03 | Festo Maschf Stoll G | Slide Valve |
| GB2119065A (en) * | 1982-04-28 | 1983-11-09 | Walton Eng Co Ltd | Mixing and diverting valves |
-
1988
- 1988-07-22 GB GB888817504A patent/GB8817504D0/en active Pending
-
1989
- 1989-07-19 GB GB8916500A patent/GB2221283A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB649966A (en) * | 1947-06-16 | 1951-02-07 | Permutit Co Ltd | Improvements relating to rotary multiport valves |
| GB679590A (en) * | 1949-10-28 | 1952-09-17 | Charles Victor Rowell | Improvements in liquid mixing valves |
| US3613731A (en) * | 1970-06-12 | 1971-10-19 | Aquamatic Inc | Multiport valve |
| GB1451806A (en) * | 1972-11-09 | 1976-10-06 | Purex Corp | Filter devices for the filtration of swimming pool water |
| GB2047852A (en) * | 1979-04-28 | 1980-12-03 | Festo Maschf Stoll G | Slide Valve |
| GB2119065A (en) * | 1982-04-28 | 1983-11-09 | Walton Eng Co Ltd | Mixing and diverting valves |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2669405A1 (en) * | 1990-11-19 | 1992-05-22 | Perge Investissement | Apparatus and method for controlling the temperature in a heating installation and heating installation incorporating such an apparatus |
| EP0685624A3 (en) * | 1994-06-04 | 1997-01-15 | Camco Drilling Group Ltd | A modulated bias unit for rotary drilling. |
| WO2003044408A1 (en) * | 2001-11-23 | 2003-05-30 | Alco Corporation | Diverter for changing flow routine in boiler |
| WO2005059415A1 (en) * | 2003-12-16 | 2005-06-30 | L'air Liquide Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude | System for dividing a main gas stream into several complementary gas streams |
| US10000289B2 (en) | 2012-02-02 | 2018-06-19 | Senior Ip Gmbh | Temperature control gasper apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8916500D0 (en) | 1989-09-06 |
| GB8817504D0 (en) | 1988-08-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |