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GB820897A - Improvements in or relating to relief valves - Google Patents

Improvements in or relating to relief valves

Info

Publication number
GB820897A
GB820897A GB31446/56A GB3144656A GB820897A GB 820897 A GB820897 A GB 820897A GB 31446/56 A GB31446/56 A GB 31446/56A GB 3144656 A GB3144656 A GB 3144656A GB 820897 A GB820897 A GB 820897A
Authority
GB
United Kingdom
Prior art keywords
relief valve
stage relief
pressure
stage
open
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
GB31446/56A
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.)
Aro Equipment Corp
Original Assignee
Aro Equipment Corp
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 Aro Equipment Corp filed Critical Aro Equipment Corp
Publication of GB820897A publication Critical patent/GB820897A/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
    • F16K17/048—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 combined with other safety valves, or with pressure control devices

Landscapes

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

Abstract

820,897. Valves. ARO EQUIPMENT CORPORATION. Oct. 16, 1956 [Aug. 13, 1956], No. 31446/56. Class 135. A two-stage relief valve comprises a first stage relief valve, means for opening the first stage relief valve wide open once it cracks open, a second stage relief valve adapted to be opened by pressure from the first stage relief valve, detent means to hold the second stage valve open until the pressure acting thereon is substantially zero and an adjustable orifice in the outlet from the second stage relief valve. On the pressure exceeding the setting of the first stage relief valve the ball valve member 14 is unseated permitting a build-up of pressure in the conduit 22, the outlet of which is closed by the valve member 26 of the second stage relief valve. The pressure in conduit 22 quickly reaches a value sufficiently high to act on the diaphragm 18 to bow it down and open the first stage relief valve to its maximum extent. The ensuing build-up of pressure in the conduit 22 cracks open the second stage relief valve which opens to its maximum position. The adjustable orifice 42 is set such that the back pressure is just sufficient to maintain the first stage relief valve wide open for continuous flow. The adjustable orifice may be replaced by a restricted orifice if adjustment is not required. Detent means in the form of a spring-loaded ball 34 coacting with a groove 32 on the valve member 26 are provided to hold the second stage relief valve open until the pressure in the conduit 22 drops to substantially zero.
GB31446/56A 1956-08-13 1956-10-16 Improvements in or relating to relief valves Expired GB820897A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US820897X 1956-08-13

Publications (1)

Publication Number Publication Date
GB820897A true GB820897A (en) 1959-09-30

Family

ID=22169001

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31446/56A Expired GB820897A (en) 1956-08-13 1956-10-16 Improvements in or relating to relief valves

Country Status (1)

Country Link
GB (1) GB820897A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0264574A3 (en) * 1986-10-15 1989-01-11 Alfred Teves Gmbh Pressure source, in particular for a hydraulic braking system
WO1996008667A1 (en) * 1994-09-13 1996-03-21 Siemens Aktiengesellschaft Safety valve, in particular one designed as a pressure-relief and protection valve
CN113404919A (en) * 2021-07-29 2021-09-17 四川长仪油气集输设备股份有限公司 Controller subassembly has sealed voltage regulator of level four throttle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0264574A3 (en) * 1986-10-15 1989-01-11 Alfred Teves Gmbh Pressure source, in particular for a hydraulic braking system
WO1996008667A1 (en) * 1994-09-13 1996-03-21 Siemens Aktiengesellschaft Safety valve, in particular one designed as a pressure-relief and protection valve
CN113404919A (en) * 2021-07-29 2021-09-17 四川长仪油气集输设备股份有限公司 Controller subassembly has sealed voltage regulator of level four throttle
CN113404919B (en) * 2021-07-29 2022-09-06 四川长仪油气集输设备股份有限公司 Controller subassembly has sealed voltage regulator of level four throttle

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