GB1377332A - Pilot-operated relief valve - Google Patents

Pilot-operated relief valve

Info

Publication number
GB1377332A
GB1377332A GB419973A GB419973A GB1377332A GB 1377332 A GB1377332 A GB 1377332A GB 419973 A GB419973 A GB 419973A GB 419973 A GB419973 A GB 419973A GB 1377332 A GB1377332 A GB 1377332A
Authority
GB
United Kingdom
Prior art keywords
pressure
diaphragm
fluid
port
jan
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
GB419973A
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 GB1377332A publication Critical patent/GB1377332A/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

Abstract

1377332 Fluid-pressure servomotor systems ANDERSON GREENWOOD & CO 26 Jan 1973 [26 Jan 1972] 4199/73 Heading G3P A pilot valve has a port 16 supplying control pressure to a main relief valve from an inlet 14 and a vent 18 controlled by a closing member 80 associated with a diaphragm 70 having a large effective pressure area to give the member 22 a snap action. The snap action is further assisted by a baffle ring 68 which converts kinetic energy in the flowing fluid into a static pressure to assist upward movement of the diaphragm 70 against an adjustable spring-load 24. A back-up plate 32 co-operates with a shoulder 90 to limit this upward movement and the pressure at which the pilot valve again closes is adjusted by a throttle 92 in the vent. The closure member consists of an O-ring assembled in a compressed state between outer and inner members 72, 82 the outer member having a hexagonal outer edge through which pressure fluid may reach the diaphragm 70. In a second embodiment, the valve is made insensitive to pressure changes at the port 18 by providing a second diaphragm in fluid communication with the port, the diaphragm being interposed between the spring and the back-up plate.
GB419973A 1972-01-26 1973-01-26 Pilot-operated relief valve Expired GB1377332A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22076972A 1972-01-26 1972-01-26

Publications (1)

Publication Number Publication Date
GB1377332A true GB1377332A (en) 1974-12-11

Family

ID=22824890

Family Applications (1)

Application Number Title Priority Date Filing Date
GB419973A Expired GB1377332A (en) 1972-01-26 1973-01-26 Pilot-operated relief valve

Country Status (1)

Country Link
GB (1) GB1377332A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122388A (en) * 1982-06-14 1984-01-11 Teledyne Farris Eng Pressure relief valve
CN112797221A (en) * 2021-03-01 2021-05-14 四川长仪油气集输设备股份有限公司 Pilot axial flow type safety valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122388A (en) * 1982-06-14 1984-01-11 Teledyne Farris Eng Pressure relief valve
US4462420A (en) * 1982-06-14 1984-07-31 Teledyne Farris Engineering Safety pressure relief valve
CN112797221A (en) * 2021-03-01 2021-05-14 四川长仪油气集输设备股份有限公司 Pilot axial flow type safety valve

Similar Documents

Publication Publication Date Title
GB1284969A (en) Improvements in controls for valves
GB1068447A (en) Fluid pressure regulator
GB1251280A (en)
GB1364301A (en) Cross-connection control valve assembly
ES8201710A1 (en) Diaphragm valve with multiple pivot axis valve element
GB1136967A (en) Improvements in safety valves
GB1537409A (en) Pilot regulator
GB1132929A (en) Improvements in or relating to relief valves
GB1417931A (en) Control valves
GB1266737A (en)
GB1377332A (en) Pilot-operated relief valve
GB1304620A (en)
GB1395096A (en) Gas pressure regulator
GB1497567A (en) Fluid valve devices
GB1097577A (en) Improvements in tractor hydraulic control systems
GB1338270A (en) Fluid flow control valves
GB1480803A (en) Pressure regulator for pneumatic systems
GB967141A (en) Pressure relief valve
GB1016694A (en) Improvements relating to fluid flow control valves
GB1377331A (en) Pressure relief systems
GB1351796A (en) Pressure regulating safety valve device
GB849267A (en) Fluid pressure regulator
GB1223122A (en) Fluid pressure governors
GB1078299A (en) Fluid flow safety valve
GB994272A (en) Pressure reducing valves

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee