GB2181819A - Valve - Google Patents

Valve Download PDF

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Publication number
GB2181819A
GB2181819A GB8525841A GB8525841A GB2181819A GB 2181819 A GB2181819 A GB 2181819A GB 8525841 A GB8525841 A GB 8525841A GB 8525841 A GB8525841 A GB 8525841A GB 2181819 A GB2181819 A GB 2181819A
Authority
GB
United Kingdom
Prior art keywords
valve
bores
fluid
vacuum
port
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Withdrawn
Application number
GB8525841A
Other versions
GB8525841D0 (en
Inventor
Bjorn Johan Erik Andersson
Gordon Lee
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB8525841A priority Critical patent/GB2181819A/en
Publication of GB8525841D0 publication Critical patent/GB8525841D0/en
Publication of GB2181819A publication Critical patent/GB2181819A/en
Withdrawn legal-status Critical Current

Links

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
    • F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
    • F16K24/06—Devices, e.g. valves, for venting or aerating enclosures for aerating only
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/104—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using a single check valve
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/108—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves having an aerating valve
    • 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
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/025—Check valves with guided rigid valve members the valve being loaded by a spring
    • F16K15/026—Check valves with guided rigid valve members the valve being loaded by a spring the valve member being a movable body around which the medium flows when the valve is open

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)

Abstract

A valve comprising a valve body 1 having an inlet port 2, a central chamber 3 and an outlet port 4. Fluid enters the central chamber 3 via the inlet port 2 and entry bores 5 and the fluid pressure causes a lift valve closure 7 to block vent bores 6 so that the fluid can leave via outlet port 4 which is provided with a check- valve 8. Occurence of a partial vacuum in the supply lifts the closure 7 to allow air into the valve via bores 6 so breaking the vacuum. <IMAGE>

Description

SPECIFICATION Valve This invention relates to a valve designed to prevent back-siphonage of fluid from an appliance which is connected to a fluid supply.
Under certain conditions it is possible for a vacuum, or partial vacuum, to be created in a water supply which will cause polluted water to be siphoned back through service connections from appliances such as, for example, baths, bidets, containers and boilers, thereby polluting the water supply, It is an aim of the invention to provide a valve which will inhibit such back siphonage from taking place.
According to the invention there is provided a valve having a movable member, one or more fluid entry ports, one or more vent ports and an outlet from the valve arranged so that when fluid passes through said entry port(s) the movable member is subjected to pressure exerted by the fluid urging the movable member to a position blocking the vent port(s) and the fluid is allowed to continue through the outlet and out of the valve, whereas when a vacuum or partial vacuum is created in said fluid entry port(s) the movable member is displaced causing the vent port(s) to be opened thereby allowing air into the valve to break the vacuum or partial vacuum.
Preferably said outlet is provided with a check-valve mechanism biased to the closed position, preferably spring-biased.
An embodiment of this invention will now be described by way of example with reference to the accompanying drawing in which the sole figure is a sectional view of a valve embodying the invention.
Advantageously, said movable member comprises a piston.
Referring to the drawing, a valve comprises a valve body 1 having an inlet port 2, a central chamber 3 and an outlet port 4. Leading from the inlet port 2 into the chamber 3 are four fluid entry bores 5 equi-spaced about the longitudinal axis of the valve. Four vent bores 6 extend from the chamber 3 to the outside atmosphere. The bores 6 are also equi-spaced about the longitudinal axis but are offset from the bores 5 (the view in the drawing comprises sections in two angled planes).
A piston 7 is seated in the chamber 3 so as to block the bores 6 while fluid enters through bores 5. A spring-biased check-valve mechanism 8 is fitted within the outlet port 4.
Under normal flow conditions water will flow in the direction of the arrow A through the inlet port 2, through the bores 5 and into the chamber 3 above the piston 7, the pressure of the water in the chamber 3 then holding the piston in its seat, thereby blocking the bores 6. The pressure of the water then opens the check-valve mechanism 8 against the spring-bias and flows out of the valve.
When a vacuum or partial vacuum occurs in the supply, suction is created at the inlet port 2 and thence through the bores 5 to the chamber 3 causing the piston 7 to be lifted so that the bores 6 are opened and air is vented into the chamber 3 and back down the bores 5, thereby breaking the vacuum. At the same time the lack of fluid pressure acting on the check-valve mechanism 8 allows it to remain closed under spring-bias thus preventing any water on the downstream side of the valve entering the valve body.
Once the vacuum has been broken, normal flow conditions can resume with operation as described above.
The valve shown in the drawing is designed to inhibit back-siphonage of dirty or polluted water from an appliance which is connected to a water supply. The valve described above could perform its function effectively with different numbers of bleed bores 6 and fluid entry bores 5 and these respective numbers might be mutually different. Also, the checkvalve may comprise any one of a number of different types.
It will be understood that the valve described above can be arranged for operation in any desired orientation, i.e. horizontally, vertically or any intermediate angle.
1. A valve having a movable member, one or more fluid entry ports, one or more vent ports and an outlet from the valve arranged so that when fluid passes through said entry port(s) the movable member is subjected to pressure exerted by the fluid urging the movable member to a position blocking the vent port(s) and the fluid is allowed to continue through the outlet and out of the valve, whereas when a vacuum or partial vacuum is created in said fluid entry port(s) the movable member is displaced causing the vent port(s) to be opened thereby allowing air into the valve to break the vacuum or partial vacuum.
2. A valve according to claim 1, wherein said outlet is provided with a check-valve mechanism biased to the closed position.
3. A valve according to claim 2, wherein the check-valve mechanism is spring-biased to the closed position.
4. A valve according to any one of the preceding claims, wherein the valve comprises a valve body having an inlet port and an outlet port aligned along a longitudinal axis of the valve body.
5. A valve according to claim 4, wherein a plurality of the fluid entry ports extend from the inlet port into a central chamber of the valve, the fluid entry ports being evenly distributed around the longitudinal axis of the valve body.
6. A valve according to claim 4 or claim 5, wherein a plurality of vent ports are distri
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (9)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Valve This invention relates to a valve designed to prevent back-siphonage of fluid from an appliance which is connected to a fluid supply. Under certain conditions it is possible for a vacuum, or partial vacuum, to be created in a water supply which will cause polluted water to be siphoned back through service connections from appliances such as, for example, baths, bidets, containers and boilers, thereby polluting the water supply, It is an aim of the invention to provide a valve which will inhibit such back siphonage from taking place. According to the invention there is provided a valve having a movable member, one or more fluid entry ports, one or more vent ports and an outlet from the valve arranged so that when fluid passes through said entry port(s) the movable member is subjected to pressure exerted by the fluid urging the movable member to a position blocking the vent port(s) and the fluid is allowed to continue through the outlet and out of the valve, whereas when a vacuum or partial vacuum is created in said fluid entry port(s) the movable member is displaced causing the vent port(s) to be opened thereby allowing air into the valve to break the vacuum or partial vacuum. Preferably said outlet is provided with a check-valve mechanism biased to the closed position, preferably spring-biased. An embodiment of this invention will now be described by way of example with reference to the accompanying drawing in which the sole figure is a sectional view of a valve embodying the invention. Advantageously, said movable member comprises a piston. Referring to the drawing, a valve comprises a valve body 1 having an inlet port 2, a central chamber 3 and an outlet port 4. Leading from the inlet port 2 into the chamber 3 are four fluid entry bores 5 equi-spaced about the longitudinal axis of the valve. Four vent bores 6 extend from the chamber 3 to the outside atmosphere. The bores 6 are also equi-spaced about the longitudinal axis but are offset from the bores 5 (the view in the drawing comprises sections in two angled planes). A piston 7 is seated in the chamber 3 so as to block the bores 6 while fluid enters through bores 5. A spring-biased check-valve mechanism 8 is fitted within the outlet port 4. Under normal flow conditions water will flow in the direction of the arrow A through the inlet port 2, through the bores 5 and into the chamber 3 above the piston 7, the pressure of the water in the chamber 3 then holding the piston in its seat, thereby blocking the bores 6. The pressure of the water then opens the check-valve mechanism 8 against the spring-bias and flows out of the valve. When a vacuum or partial vacuum occurs in the supply, suction is created at the inlet port 2 and thence through the bores 5 to the chamber 3 causing the piston 7 to be lifted so that the bores 6 are opened and air is vented into the chamber 3 and back down the bores 5, thereby breaking the vacuum. At the same time the lack of fluid pressure acting on the check-valve mechanism 8 allows it to remain closed under spring-bias thus preventing any water on the downstream side of the valve entering the valve body. Once the vacuum has been broken, normal flow conditions can resume with operation as described above. The valve shown in the drawing is designed to inhibit back-siphonage of dirty or polluted water from an appliance which is connected to a water supply. The valve described above could perform its function effectively with different numbers of bleed bores 6 and fluid entry bores 5 and these respective numbers might be mutually different. Also, the checkvalve may comprise any one of a number of different types. It will be understood that the valve described above can be arranged for operation in any desired orientation, i.e. horizontally, vertically or any intermediate angle. CLAIMS
1. A valve having a movable member, one or more fluid entry ports, one or more vent ports and an outlet from the valve arranged so that when fluid passes through said entry port(s) the movable member is subjected to pressure exerted by the fluid urging the movable member to a position blocking the vent port(s) and the fluid is allowed to continue through the outlet and out of the valve, whereas when a vacuum or partial vacuum is created in said fluid entry port(s) the movable member is displaced causing the vent port(s) to be opened thereby allowing air into the valve to break the vacuum or partial vacuum.
2. A valve according to claim 1, wherein said outlet is provided with a check-valve mechanism biased to the closed position.
3. A valve according to claim 2, wherein the check-valve mechanism is spring-biased to the closed position.
4. A valve according to any one of the preceding claims, wherein the valve comprises a valve body having an inlet port and an outlet port aligned along a longitudinal axis of the valve body.
5. A valve according to claim 4, wherein a plurality of the fluid entry ports extend from the inlet port into a central chamber of the valve, the fluid entry ports being evenly distributed around the longitudinal axis of the valve body.
6. A valve according to claim 4 or claim 5, wherein a plurality of vent ports are distri buted evenly around the longitudinal axis of the valve body.
7. A valve according to any one of the preceding claims, wherein said movable member comprises a piston.
8. A valve substantially as described herein with reference to the accompanying drawing.
9. An appliance to be connected to a water supply and having a valve according to any one of the preceding claims for connection to the water supply.
GB8525841A 1985-10-19 1985-10-19 Valve Withdrawn GB2181819A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8525841A GB2181819A (en) 1985-10-19 1985-10-19 Valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8525841A GB2181819A (en) 1985-10-19 1985-10-19 Valve

Publications (2)

Publication Number Publication Date
GB8525841D0 GB8525841D0 (en) 1985-11-20
GB2181819A true GB2181819A (en) 1987-04-29

Family

ID=10586952

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8525841A Withdrawn GB2181819A (en) 1985-10-19 1985-10-19 Valve

Country Status (1)

Country Link
GB (1) GB2181819A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994001706A1 (en) * 1992-07-10 1994-01-20 Scama Cooler Pty. Ltd. Valve assembly with backflow prevention and atmospheric vacuum breaker devices
EP0854311A3 (en) * 1997-01-20 1999-05-06 Premark International Holdings B.V. Fluid check valve
WO2013141795A1 (en) * 2012-03-19 2013-09-26 Ab Durgo A valve arrangement
EP2719841A1 (en) * 2012-10-10 2014-04-16 Antonio Attilio Rossi Aeration valve for use in a drinking water system

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1286671A (en) * 1969-03-13 1972-08-23 Crosweller & Co Ltd W Improvements in, or relating to, fluid flow control valves
GB1403836A (en) * 1973-05-03 1975-08-28 Bailey Birmingham Ltd William Anti-syphon valve
GB1414623A (en) * 1971-10-11 1975-11-19 Sheardown J M Valves
GB1510895A (en) * 1976-06-08 1978-05-17 Peglers Ltd Anti-siphonage valves
GB2011584A (en) * 1977-12-31 1979-07-11 Armaturenfabrik U Metallgiesse Backflow preventing valve
GB2039345A (en) * 1979-01-10 1980-08-06 Peglers Ltd An improvement in or relating to float valves
GB1574788A (en) * 1978-05-23 1980-09-10 Ass Elect Ind Valves
US4326671A (en) * 1980-02-05 1982-04-27 Goguen Robert P Anti-siphon selector valve

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1286671A (en) * 1969-03-13 1972-08-23 Crosweller & Co Ltd W Improvements in, or relating to, fluid flow control valves
GB1414623A (en) * 1971-10-11 1975-11-19 Sheardown J M Valves
GB1403836A (en) * 1973-05-03 1975-08-28 Bailey Birmingham Ltd William Anti-syphon valve
GB1510895A (en) * 1976-06-08 1978-05-17 Peglers Ltd Anti-siphonage valves
GB2011584A (en) * 1977-12-31 1979-07-11 Armaturenfabrik U Metallgiesse Backflow preventing valve
GB1574788A (en) * 1978-05-23 1980-09-10 Ass Elect Ind Valves
GB2039345A (en) * 1979-01-10 1980-08-06 Peglers Ltd An improvement in or relating to float valves
US4326671A (en) * 1980-02-05 1982-04-27 Goguen Robert P Anti-siphon selector valve

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994001706A1 (en) * 1992-07-10 1994-01-20 Scama Cooler Pty. Ltd. Valve assembly with backflow prevention and atmospheric vacuum breaker devices
GB2283300A (en) * 1992-07-10 1995-05-03 Scama Cooler Pty Ltd Valve assembly with backflow prevention and atmospheric vacuum breaker devices
EP0854311A3 (en) * 1997-01-20 1999-05-06 Premark International Holdings B.V. Fluid check valve
WO2013141795A1 (en) * 2012-03-19 2013-09-26 Ab Durgo A valve arrangement
EP2719841A1 (en) * 2012-10-10 2014-04-16 Antonio Attilio Rossi Aeration valve for use in a drinking water system

Also Published As

Publication number Publication date
GB8525841D0 (en) 1985-11-20

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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)