GB1157495A - Improvements in or relating to Quick Relief Valves. - Google Patents

Improvements in or relating to Quick Relief Valves.

Info

Publication number
GB1157495A
GB1157495A GB3637766A GB3637766A GB1157495A GB 1157495 A GB1157495 A GB 1157495A GB 3637766 A GB3637766 A GB 3637766A GB 3637766 A GB3637766 A GB 3637766A GB 1157495 A GB1157495 A GB 1157495A
Authority
GB
United Kingdom
Prior art keywords
piston
housing
rod
air
passages
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
GB3637766A
Inventor
Denis Percy Swinney
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.)
SWINNEY BROTHERS Ltd
Original Assignee
SWINNEY BROTHERS 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 SWINNEY BROTHERS Ltd filed Critical SWINNEY BROTHERS Ltd
Priority to GB3637766A priority Critical patent/GB1157495A/en
Publication of GB1157495A publication Critical patent/GB1157495A/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
    • F16K17/08—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 special arrangements for providing a large discharge passage
    • F16K17/087—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 special arrangements for providing a large discharge passage with bellows

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Valves (AREA)

Abstract

1,157,495. Valves. SWINNEY BROS. Ltd. 16 Aug., 1967 [15 Aug., 1966], No. 36377/66. Heading F2V. In a pressure relief valve, the closure member C is attached to an end plate A of a bellows B and is biased on to its seat by compressed air supplied at a predetermined pressure to the bellows. Depending downwardly from the plate A is a piston-rod D which carries at its free end a piston E, the piston having therein a plurality of passages J and being movable relative to the rod between a shoulder H formed on, and a nut F secured to, the rod there being a small radial clearance between the piston and its housing G. Upon the valve opening, air within the lower part of housing G forces the piston against the shoulder H so uncovering passages J and so permitting the air to pass to the upper part of the housing. Return movement of the closure member is damped and retarded by virtue of the fact that the air in the upper portion of housing G forces the piston E on to nut F, so closing passages J, and can then only return to the housing lower part via the small radial clearance, the arrangement thereby serving to prevent water hammer.
GB3637766A 1966-08-15 1966-08-15 Improvements in or relating to Quick Relief Valves. Expired GB1157495A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3637766A GB1157495A (en) 1966-08-15 1966-08-15 Improvements in or relating to Quick Relief Valves.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3637766A GB1157495A (en) 1966-08-15 1966-08-15 Improvements in or relating to Quick Relief Valves.

Publications (1)

Publication Number Publication Date
GB1157495A true GB1157495A (en) 1969-07-09

Family

ID=10387598

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3637766A Expired GB1157495A (en) 1966-08-15 1966-08-15 Improvements in or relating to Quick Relief Valves.

Country Status (1)

Country Link
GB (1) GB1157495A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022941A1 (en) * 1979-07-19 1981-01-28 Bühler AG Safety valve for blower
US4274434A (en) * 1977-12-22 1981-06-23 Haefele Carl Heinz Automatic low-friction check valve
FR2484582A1 (en) * 1980-06-16 1981-12-18 Fisher Controls Sa Hydraulic damper sprung blowoff valve - uses coaxial overhead ram with unilateral divergent rod connected to valve rod by external stirrup
CN104019257A (en) * 2014-06-05 2014-09-03 中国科学院等离子体物理研究所 Novel vacuum decompression valve
US9657847B2 (en) 2012-07-18 2017-05-23 Pres-Vac Engineering Aps Pressure relief valve

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4274434A (en) * 1977-12-22 1981-06-23 Haefele Carl Heinz Automatic low-friction check valve
EP0022941A1 (en) * 1979-07-19 1981-01-28 Bühler AG Safety valve for blower
FR2484582A1 (en) * 1980-06-16 1981-12-18 Fisher Controls Sa Hydraulic damper sprung blowoff valve - uses coaxial overhead ram with unilateral divergent rod connected to valve rod by external stirrup
US9657847B2 (en) 2012-07-18 2017-05-23 Pres-Vac Engineering Aps Pressure relief valve
CN104019257A (en) * 2014-06-05 2014-09-03 中国科学院等离子体物理研究所 Novel vacuum decompression valve
CN104019257B (en) * 2014-06-05 2017-10-20 中国科学院等离子体物理研究所 A kind of novel evacuated relief valve

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees