GB1377332A - Pilot-operated relief valve - Google Patents
Pilot-operated relief valveInfo
- 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
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)
- Safety Valves (AREA)
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.
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)
| 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 |
-
1973
- 1973-01-26 GB GB419973A patent/GB1377332A/en not_active Expired
Cited By (3)
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |