GB746441A - Relief valve - Google Patents
Relief valveInfo
- Publication number
- GB746441A GB746441A GB12793/54A GB1279354A GB746441A GB 746441 A GB746441 A GB 746441A GB 12793/54 A GB12793/54 A GB 12793/54A GB 1279354 A GB1279354 A GB 1279354A GB 746441 A GB746441 A GB 746441A
- Authority
- GB
- United Kingdom
- Prior art keywords
- port
- plug
- pressure
- piston
- inlet
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
746,441. Fluid-pressure servomotor-control systems. DROITCOUR, H. A., and DROITCOUR; J. M. May 3, 1954, No. 12793/54. Class 135. A relief valve comprises a main valve plug 31 controlling a conduit between an inlet port 12 and an outlet port 13 and connected to a pressure-responsive member 32 movable in response to the difference between inlet port pressure in a chamber 35 having a restricted connection 65 with the inlet port 12 and a control port 37 for venting the chamber, the port 37 being closed against the pressure within the chamber 35 by a pilot valve plug 40 mechanically connected to a control member 57 responsive to the inlet port pressure and blocking a second conduit between the inlet port and the outlet port, the control member 57 being loaded by a spring 49. In Fig. 1 the spring acts through a pivoted member 54, which engages both the plug 40 and the control member 57. The working parts of the valve are all assembled in a unit 15 removably mounted in a bore 11 of a housing 10. The unit 15 is sealed by O- section rings 16, 17, and is held against rotation by a screw 19. The pressure-responsive member is formed as a grooved piston 32 integral with the plug 31 and slides in a bore 20 open to the inlet by a port 34. The piston may have a fit which allows some leakage of the inlet fluid into the chamber 35 or a restricted passage 65 may be provided in the piston. The plug and piston unit 31, 32 is pressed by a spring 36 against a seat formed on a block 23. The block 23 rests on a screwed plug 21 and has a bore 24 which connects by channels 25, 27 with the exhaust port 13. The pilot valve plug 40 is guided by a coil of wire 42 and co-operates with a seat 39. The upper end of the plug 40 engages a recess in the member 54 which is pivoted at 55 in a slot 44. The control member 57 is formed as a piston and has an 0-section packing 62 and a projection 58 to engage a recess in the lever member 54. The loading spring 49 is adjusted by a screw 50 carrying a lock-nut 66 and engaging a slidable block 46 above the spring 49. The inlet pressure has access to the piston 57 through channels 64, 63, which with the inlet port are sealed by a ring 18. In a modification, the pistons 32, 57 are replaced by bellows and the pilot bellows operates on a yoke carrying the pilot valve.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB12793/54A GB746441A (en) | 1954-05-03 | 1954-05-03 | Relief valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB12793/54A GB746441A (en) | 1954-05-03 | 1954-05-03 | Relief valve |
Publications (1)
Publication Number | Publication Date |
---|---|
GB746441A true GB746441A (en) | 1956-03-14 |
Family
ID=10011246
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12793/54A Expired GB746441A (en) | 1954-05-03 | 1954-05-03 | Relief valve |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB746441A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3328857A1 (en) * | 1982-08-17 | 1984-02-23 | Gemignani, André, Martigues, Bouches-du-Rhône | CONTROLLED SAFETY VALVE |
CN105972001A (en) * | 2016-06-30 | 2016-09-28 | 江苏金荣森制冷科技有限公司 | Industrial refrigeration device for hydraulic bypass with adjustable pressure relief valve |
-
1954
- 1954-05-03 GB GB12793/54A patent/GB746441A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3328857A1 (en) * | 1982-08-17 | 1984-02-23 | Gemignani, André, Martigues, Bouches-du-Rhône | CONTROLLED SAFETY VALVE |
CN105972001A (en) * | 2016-06-30 | 2016-09-28 | 江苏金荣森制冷科技有限公司 | Industrial refrigeration device for hydraulic bypass with adjustable pressure relief valve |
CN105972001B (en) * | 2016-06-30 | 2017-10-27 | 江苏金荣森制冷科技有限公司 | The industrial refrigerating plant of hydraulic pressure bypass with adjustable relief valve |
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