GB1283770A - Relief valve - Google Patents

Relief valve

Info

Publication number
GB1283770A
GB1283770A GB4987969A GB4987969A GB1283770A GB 1283770 A GB1283770 A GB 1283770A GB 4987969 A GB4987969 A GB 4987969A GB 4987969 A GB4987969 A GB 4987969A GB 1283770 A GB1283770 A GB 1283770A
Authority
GB
United Kingdom
Prior art keywords
valve
pilot
pressure
bellows
chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4987969A
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.)
Anderson Greenwood and Co
Original Assignee
Anderson Greenwood and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anderson Greenwood and Co filed Critical Anderson Greenwood and Co
Publication of GB1283770A publication Critical patent/GB1283770A/en
Expired 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
    • F16K17/10—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 auxiliary valve for fluid operation of the main valve
    • F16K17/105—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 auxiliary valve for fluid operation of the main valve using choking or throttling means to control the fluid operation of the main valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7758—Pilot or servo controlled
    • Y10T137/7762—Fluid pressure type
    • Y10T137/7764—Choked or throttled pressure type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7771—Bi-directional flow valves

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)
  • Control Of Fluid Pressure (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

1283770 Valves ANDERSON, GREENWOOD & CO 10 Oct 1969 [20 March 1969] 49879/69 [20 March 1969] Heading F2V [Also in Division G3] In a pilot-operated pressure relief valve the main valve member 24 is constructed with a seat facing recess 56 that is covered with a diaphragm 46 which when the valve is closed engages seat 20 and is biased theretowards by fluid pressure communicated through the member 24 to the recess from an actuating bellows 30 connected to the pilot valve. The valve member 74 of the latter is operated by a spring-loaded double diaphragm arrangement 82, 84, the chamber 90 on one side of which is connected to atmosphere while the opposing chamber 86 is connected to the inlet 16 of the relief valve via conduit 78 and a passage (92), pressure from which also communicates via a variable restriction with conduit 42 leading to bellows 30 and via the variable restriction and a further fixed restriction with the chamber 88 intermediate the diaphragms. Increase of pressure in inlet 16 and thus chamber 86 opens pilot valve 74 to exhaust bellows 30 to atmosphere and open relief valve 24. The main valve member also has a further seal 50 held in place by a limit stop 52. The pilot valve may be connected to the main valve so as to relieve excess vacuum. Two pilot valves may be connected to the bellows 30 so that the relief valve responds to both excess vacuum and pressure.
GB4987969A 1969-03-20 1969-10-10 Relief valve Expired GB1283770A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US80879769A 1969-03-20 1969-03-20

Publications (1)

Publication Number Publication Date
GB1283770A true GB1283770A (en) 1972-08-02

Family

ID=25199768

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4987969A Expired GB1283770A (en) 1969-03-20 1969-10-10 Relief valve

Country Status (3)

Country Link
US (1) US3583432A (en)
DE (2) DE1965144C3 (en)
GB (1) GB1283770A (en)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4333496A (en) * 1980-09-15 1982-06-08 Grove Valve And Regulator Company Surge reliever with increase capacity flow
DE3414294A1 (en) * 1984-04-14 1985-10-24 Drago Dipl.-Ing. 5020 Frechen Kober SAFETY VALVE FOR LIQUID GAS TANKS, ESPECIALLY SHIP TANKS
EP0164566A3 (en) * 1984-05-11 1986-10-29 LGA Gastechnik GmbH Safety device for liquefied-gas tanks
US4619115A (en) * 1985-05-30 1986-10-28 Sundstrand Corporation Back pressure regulating valve
US4682622A (en) * 1985-12-11 1987-07-28 Sundstrand Corporation Pressure regulating valve
DE8817026U1 (en) * 1988-01-13 1992-03-05 Barth, Hans, 7801 Schallstadt, De
US5163471A (en) * 1992-05-26 1992-11-17 Powell Walter W Low-pressure pilot valve
US5246034A (en) * 1992-06-29 1993-09-21 Keystone International Holdings Corp. Fluid pressure relief system for pressure vessels
US5443090A (en) * 1994-04-08 1995-08-22 Ligh; Jone Y. Modular pilot operated vent actuator
US5499648A (en) * 1994-08-30 1996-03-19 Groth Corporation Sealing means for pressure relief valves and methods of assembly
DE29511449U1 (en) * 1995-07-15 1996-11-14 Melcher Sportwaffen Drum weapon, especially drum revolver
US5845675A (en) * 1997-10-27 1998-12-08 Ligh; J. Yen Diaphragm/spring actuated pressure relief valve with pressure balanced outlet and fail-safe operation
US6173736B1 (en) 1999-04-27 2001-01-16 J. Yen Ligh Diaphragm actuated pressure relief valve with pressure balanced outlet and fail-safe operation
US6705339B2 (en) 2002-05-28 2004-03-16 Ga Industries, Inc. Surge check unit for a liquid distribution system
US6929026B1 (en) 2003-03-28 2005-08-16 Joseph Wilfred Arlinghaus, Jr. Sanitary liquid pressure regulator
DK176684B1 (en) * 2006-09-15 2009-02-16 Valpump Patent Gmbh relief valve
CN103672064A (en) * 2013-12-30 2014-03-26 乐山市山鹰模具有限责任公司 Pilot operated safety valve
US9874292B2 (en) * 2014-03-17 2018-01-23 Fisher Controls International Llc Diaphragm actuators having adjustable actuation force
JP6582347B2 (en) 2015-12-10 2019-10-02 三菱造船株式会社 Safety valve system, tank, ship, operation method of safety valve system in ship
CN108662224B (en) * 2018-07-19 2019-09-24 台州嘉亨阀门有限公司 A kind of pressure maintaining valve
EP3880583A4 (en) 2018-11-14 2023-01-04 Franklin Fueling Systems, LLC Pressure vacuum valve
US11567515B2 (en) 2019-07-19 2023-01-31 Emerson Automation Solutions Final Control US LP Rapid dome loading pilot valve bypass

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2853096A (en) * 1958-09-23 Relief valve assemblies
US1678700A (en) * 1926-09-30 1928-07-31 Andrew J Mcewan Combined vacuum and pressure relief valve for receiving and storage tanks
US2638107A (en) * 1948-04-05 1953-05-12 Bendix Aviat Corp Suction regulating valve
US2647345A (en) * 1951-06-25 1953-08-04 Ensign Carburetor Company Fluid pressure regulator with tight shutoff action
US3477456A (en) * 1967-04-03 1969-11-11 Anderson Greenwood & Co Valve

Also Published As

Publication number Publication date
DE1965144A1 (en) 1970-10-01
US3583432A (en) 1971-06-08
DE1966631A1 (en) 1973-07-12
DE1965144B2 (en) 1979-02-01
DE1965144C3 (en) 1979-09-27

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years