GB2090949A - Compact pressure relief valve - Google Patents

Compact pressure relief valve Download PDF

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Publication number
GB2090949A
GB2090949A GB8200417A GB8200417A GB2090949A GB 2090949 A GB2090949 A GB 2090949A GB 8200417 A GB8200417 A GB 8200417A GB 8200417 A GB8200417 A GB 8200417A GB 2090949 A GB2090949 A GB 2090949A
Authority
GB
United Kingdom
Prior art keywords
plate
aperture
ring
support member
valve
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Withdrawn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
GB8200417A
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.)
Alumasc Grundy Ltd
Original Assignee
Grundy Teddington Ltd
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 Grundy Teddington Ltd filed Critical Grundy Teddington Ltd
Priority to GB8200417A priority Critical patent/GB2090949A/en
Publication of GB2090949A publication Critical patent/GB2090949A/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Withdrawn legal-status Critical Current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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0413—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of closure plates
    • 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
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • 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
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0493—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with a spring other than a helicoidal spring

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)

Abstract

A pressure relief valve comprises a housing with a support member 1 having an inlet aperture 3 and an O- ring seal 2 positioned around same. A flexurally resilient diaphragm plate 4 seals against the O-ring 2 with the edge portion of the plate held by the housing. The plate has apertures therethrough towards the outside of the O-ring whereby excess pressure at 3 lifts the plate and causes venting through the apertures to the outlet 6, until the pressure reduces to allow the plate to reseal. <IMAGE>

Description

SPECIFICATION A pressure relief valve This invention relates to a pressure relief valve primarily intended for use in confined spaces where it is not possible to install a known conventional kind of spring pressure or plunger mechanism.
It is an object of this invention to provide an over pressure relief device occupying little volumetric space and of a flat shape and in which few moving parts are required.
According to this invention there is provided a pressure relief valve comprising a support member with an aperture therethrough and communicating with an inlet, a flexurally resilient diaphragm plate in coplanar relationship with the support and held by edge portions in spaced relationship thereto overlying the aperture, a sealing means encircling the aperture and normally in sealing contact with the plate and support member, an outlet communicating via passageways with the inlet when the plate moves away from the support sufficient for sealing contact to be lost between the seal and the plate or support.
According to this invention there is also provided a pressure relief valve comprising a support member carrying a resilient '0' ring positioned around an aperture in the member and a flexurally resilient plate normally in face sealing contact with the '0' ring, the plate incorporating one or more apertures lying diametrically outside the point of contact with the '0' ring, the arrangement being such that pressure acting on the plate through the aperture in the member above a predetermined value causes the plate to lift from the '0' ring and for communication to be established between the aperture and the other side of the plate.
Preferably the support member comprises a base portion having the aperture therethrough forming an inlet, a peripheral wall holding the edge of the plate, and a top portion with an aperture therein defining the outlet, the member being formed as a housing of disc shape.
The sealing means may be secured and retained by the support member which conveniently has a groove therein to receive a sealing means in the form of an O-ring.
With such an arrangement the device has the minimum of moving parts and can be readily incorporated within a tube or other small diameter article with the device occupying the minimum of depth. In a preferred embodiment the support member extends around and over the side of the plate opposite to the '0' ring with an aperture therein to form an outlet vent. This configuration ensures that the parts of the valve are retained should any catastrophic damage occur.
Further features of the invention are described in conjunction with the accompanying drawings showing one embodiment by way of an example.
In the drawings: Figure 1 shows longitudinal sectional view through an installed pressure relief valve, and Figure 2 shows a detail of the operation.
Referring to the drawings, the valve comprises a support member 1 which has an annular recess or groove partially housing a resilient '0' ring sealing means 2 which lies around an aperture 3 provided in the member and forming an inlet. Side wall parts of the member 1 support a thin metal diaphragm plate 4 and these side parts further extend around and over the other side of the diaphragm forming a top to define a vent aperture forming an outlet 6. Normally the diaphragm 4 forms a seal against the '0' ring 2 but on application of sufficient pressure from the direction A the diaphragm flexes upwardly and by providing slots or apertures in the plate to the outside of the sealing O-ring 2 such over pressure may vent through the aperture 6. In Figure 2, (a) shows the normal sealed position, whereas (b) shows the escape path for a gas when over pressure occurs.The diaphragm may include slots or apertures such as 7 in Figure 2. In the drawings B illustrates the escape outlet path of gas when the valve operates.
When the excess pressure has escaped then the diaphragm 4 resumes its normal sealing position. By extending the member 1 around the diaphragm in the manner shown forming a top portion safety is substantially improved in so far as retention of the parts is ensured following disintegration for any reason. In the embodiment shown the diaphragm 4 is a 0.2 millimetre thick stainless steel plate with two peripherally located cut-outs forming the apertures 7. Figure 1 shows the valve device located in a pipe P. The diaphragm itself may be readily changed when installed in order to change the relief pressure.
1. A pressure relief valve comprising a support member with an aperture therethrough and communicating with an inlet, a flexurally resilient diaphragm plate in coplanar relationship with the support and held by edge portions in spaced relationship thereto overlying the aperture, a sealing means encircling the aperture and normally in sealing contact with the plate and support member, an outlet communicating via passageways with the inlet when the plate moves away from the support sufficient for sealing contact to be lost between the seal and the plate or support.
2. A valve in accordance with Claim 1, wherein the support member comprises a base portion having the aperture therethrough forming an inlet, a peripheral wall holding the edge of the plate, and a top portion with an aperture therein defining the outlet, the member being formed as a housing of disc shape.
3. A valve in accordance with Claim 1 or 2, wherein the sealing means is retained by the support member.
4. A valve in accordance with Claim 1, 2 or 3, wherein the sealing means is an "0" ring located in a groove in the support member.
5. A valve in accordance with any preceding
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (8)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION A pressure relief valve This invention relates to a pressure relief valve primarily intended for use in confined spaces where it is not possible to install a known conventional kind of spring pressure or plunger mechanism. It is an object of this invention to provide an over pressure relief device occupying little volumetric space and of a flat shape and in which few moving parts are required. According to this invention there is provided a pressure relief valve comprising a support member with an aperture therethrough and communicating with an inlet, a flexurally resilient diaphragm plate in coplanar relationship with the support and held by edge portions in spaced relationship thereto overlying the aperture, a sealing means encircling the aperture and normally in sealing contact with the plate and support member, an outlet communicating via passageways with the inlet when the plate moves away from the support sufficient for sealing contact to be lost between the seal and the plate or support. According to this invention there is also provided a pressure relief valve comprising a support member carrying a resilient '0' ring positioned around an aperture in the member and a flexurally resilient plate normally in face sealing contact with the '0' ring, the plate incorporating one or more apertures lying diametrically outside the point of contact with the '0' ring, the arrangement being such that pressure acting on the plate through the aperture in the member above a predetermined value causes the plate to lift from the '0' ring and for communication to be established between the aperture and the other side of the plate. Preferably the support member comprises a base portion having the aperture therethrough forming an inlet, a peripheral wall holding the edge of the plate, and a top portion with an aperture therein defining the outlet, the member being formed as a housing of disc shape. The sealing means may be secured and retained by the support member which conveniently has a groove therein to receive a sealing means in the form of an O-ring. With such an arrangement the device has the minimum of moving parts and can be readily incorporated within a tube or other small diameter article with the device occupying the minimum of depth. In a preferred embodiment the support member extends around and over the side of the plate opposite to the '0' ring with an aperture therein to form an outlet vent. This configuration ensures that the parts of the valve are retained should any catastrophic damage occur. Further features of the invention are described in conjunction with the accompanying drawings showing one embodiment by way of an example. In the drawings: Figure 1 shows longitudinal sectional view through an installed pressure relief valve, and Figure 2 shows a detail of the operation. Referring to the drawings, the valve comprises a support member 1 which has an annular recess or groove partially housing a resilient '0' ring sealing means 2 which lies around an aperture 3 provided in the member and forming an inlet. Side wall parts of the member 1 support a thin metal diaphragm plate 4 and these side parts further extend around and over the other side of the diaphragm forming a top to define a vent aperture forming an outlet 6. Normally the diaphragm 4 forms a seal against the '0' ring 2 but on application of sufficient pressure from the direction A the diaphragm flexes upwardly and by providing slots or apertures in the plate to the outside of the sealing O-ring 2 such over pressure may vent through the aperture 6. In Figure 2, (a) shows the normal sealed position, whereas (b) shows the escape path for a gas when over pressure occurs.The diaphragm may include slots or apertures such as 7 in Figure 2. In the drawings B illustrates the escape outlet path of gas when the valve operates. When the excess pressure has escaped then the diaphragm 4 resumes its normal sealing position. By extending the member 1 around the diaphragm in the manner shown forming a top portion safety is substantially improved in so far as retention of the parts is ensured following disintegration for any reason. In the embodiment shown the diaphragm 4 is a 0.2 millimetre thick stainless steel plate with two peripherally located cut-outs forming the apertures 7. Figure 1 shows the valve device located in a pipe P. The diaphragm itself may be readily changed when installed in order to change the relief pressure. CLAIMS
1. A pressure relief valve comprising a support member with an aperture therethrough and communicating with an inlet, a flexurally resilient diaphragm plate in coplanar relationship with the support and held by edge portions in spaced relationship thereto overlying the aperture, a sealing means encircling the aperture and normally in sealing contact with the plate and support member, an outlet communicating via passageways with the inlet when the plate moves away from the support sufficient for sealing contact to be lost between the seal and the plate or support.
2. A valve in accordance with Claim 1, wherein the support member comprises a base portion having the aperture therethrough forming an inlet, a peripheral wall holding the edge of the plate, and a top portion with an aperture therein defining the outlet, the member being formed as a housing of disc shape.
3. A valve in accordance with Claim 1 or 2, wherein the sealing means is retained by the support member.
4. A valve in accordance with Claim 1, 2 or 3, wherein the sealing means is an "0" ring located in a groove in the support member.
5. A valve in accordance with any preceding claim, wherein the outlet communicates with the inlet via passageways through the plate positioned outwardly of the point of contact with the sealing means.
6. A pressure relief valve comprising a support member carrying a resilient '0' ring positioned around an aperture in the member and a flexurally resilient plate normally in face sealing contact with the '0' ring, the plate incorporating one or more apertures lying diametrically outside the point of contact with the '0' ring, the arrangement being such that pressure acting on the plate through the aperture in the member above a predetermined value causes the plate to lift from the '0' ring and for communication to be established between the aperture and the other side of the plate.
7. A valve according to Claim 6, wherein the support member extends around and over the side of the plate opposite to the '0' ring with an aperture therein to form an outlet vent.
8. A pressure relief valve substantially as described herein and as shown in the accompanying drawings.
GB8200417A 1981-01-08 1982-01-07 Compact pressure relief valve Withdrawn GB2090949A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8200417A GB2090949A (en) 1981-01-08 1982-01-07 Compact pressure relief valve

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8100538 1981-01-08
GB8200417A GB2090949A (en) 1981-01-08 1982-01-07 Compact pressure relief valve

Publications (1)

Publication Number Publication Date
GB2090949A true GB2090949A (en) 1982-07-21

Family

ID=26278049

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8200417A Withdrawn GB2090949A (en) 1981-01-08 1982-01-07 Compact pressure relief valve

Country Status (1)

Country Link
GB (1) GB2090949A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2750656A1 (en) * 1996-07-08 1998-01-09 Plastic Omnium Cie Valve for fuel tank
US6945286B2 (en) 2002-07-02 2005-09-20 Economy Controls Corporation Closed loop fluid transfer system for liquid supply and vapor recovery

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2750656A1 (en) * 1996-07-08 1998-01-09 Plastic Omnium Cie Valve for fuel tank
US6945286B2 (en) 2002-07-02 2005-09-20 Economy Controls Corporation Closed loop fluid transfer system for liquid supply and vapor recovery

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)