GB1466022A - Pilot-controlled pressure relief valves - Google Patents
Pilot-controlled pressure relief valvesInfo
- Publication number
- GB1466022A GB1466022A GB296975A GB296975A GB1466022A GB 1466022 A GB1466022 A GB 1466022A GB 296975 A GB296975 A GB 296975A GB 296975 A GB296975 A GB 296975A GB 1466022 A GB1466022 A GB 1466022A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- piston
- ball
- pilot
- pilot valve
- 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
- F16K17/105—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 using choking or throttling means to control the fluid operation of the main valve
-
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/38—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side
- F16K31/383—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side the fluid acting on a piston
- F16K31/3835—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side the fluid acting on a piston the discharge being effected through the piston and being blockable by a mechanically-actuated member making contact with the piston
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
1466022 Valves ZAHNRADFABRIK FRIEDRICH AG 23 Jan 1975 [23 Jan 1974 8 Jan 1975 (2)] 2969/75 Heading F2V [Also in Division G3] In a pilot-operated relief valve the pilot valve has two opposed surfaces subject to inlet pressure and a further surface axially intermediate the two opposed surfaces, subject to outlet pressure. In a first embodiment, Fig. 1, the pilot valve 9 is in the form of a stepped piston with an axial passage so that inlet pressure acts on the two end faces of the piston and outlet pressure acts on a stepped face 11. In a second embodiment, Fig. 2 (not shown), the pilot valve comprises a loose ball closure member (16) seating on a main valve sliding piston (201) actuated by a plenum (14) sliding in the main piston and having an extension pin (15) of smaller diameter which lifts the ball off its seat. The end of the piston (14) opposite the ball is subject to inlet pressure via a deformable plastics seal (20) fixed in the bore (19) in which the piston (14) slides, the surface intermediate the piston and its extension pin is subject to outlet pressure and the ball is subject to outlet pressure on its surface within the seat orifice and the remaining surface of the ball is subject to inlet pressure via a passage (210) through the main valve piston (201). In a third embodiment, Fig. 3 (not shown) and similar to Fig. 2, the pilot valve (24) is a conical lift valve and a filter (22), surrounding the bore in which the plunger slides, filters not only the fluid applied to the plastics seal but also filters the supply of inlet pressure to the pilot lift valve via a bore (310) in the main valve piston. In fourth and fifth embodiments, Figs. 4 and 5 (not shown) the pilot valve member is a conical lift valve and in a sixth embodiment, Fig. 6 (not shown) having a loose-ball pilot valve a further passage (28) is provided communicating with the chamber (307) behind the main valve so that the pilot valve, and hence the main valve, may be opened by remote control of a pressure supply to the passage (28). In a seventh embodiment Fig. 7 (not shown) the pilot valve is a sliding piston valve actuated by a smaller diameter plunger, inlet pressure being applied to the opposed ends of the plunger and piston and outlet pressure being applied to the differential area where these two members are in contact. In an eighth embodiment, Fig. 8 (not shown) the pilot valve, similar in construction to that of Fig. 4, is fixed in the end of the chamber, in which the main valve moves, remote from the inlet. In a sixth embodiment, Fig. 9, the pilot valve comprises a hollow tubular moving closure member 928 which seats on a ball 929 in non-closing contact with a tubular part 930 in communication with outlet pressure. The closure member 928 slides on the tube 930 by means of a ring 933, a seal 934 being provided between the tube and closure member. The closure member moves under the combined influence of a spring 906 and inlet and outlet pressures operating on the various surfaces of the member and the ring 933 and seal 934 as influenced by the pressure of the ball seat 929. In a tenth embodiment, Fig. 10 (not shown) and generally similar to Fig. 9, the main relief valve is a lift-type whereas all the others are sliding piston-type.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19742403007 DE2403007C2 (en) | 1974-01-23 | 1974-01-23 | Pilot operated pressure relief valve |
DE2500537A DE2500537C2 (en) | 1975-01-08 | 1975-01-08 | Pilot operated pressure relief valve |
DE2500480A DE2500480C2 (en) | 1975-01-08 | 1975-01-08 | Pilot operated pressure relief valve |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1466022A true GB1466022A (en) | 1977-03-02 |
Family
ID=27185737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB296975A Expired GB1466022A (en) | 1974-01-23 | 1975-01-23 | Pilot-controlled pressure relief valves |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS5920911B2 (en) |
BG (1) | BG29576A3 (en) |
DK (1) | DK155548C (en) |
ES (1) | ES434051A1 (en) |
FR (1) | FR2258579B1 (en) |
GB (1) | GB1466022A (en) |
IT (1) | IT1026433B (en) |
PL (1) | PL108692B1 (en) |
RO (1) | RO64385A (en) |
SE (1) | SE406800B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1422456A1 (en) * | 2002-11-19 | 2004-05-26 | HydraForce, Inc. | Self-cleaning filter |
CN108488395A (en) * | 2018-05-30 | 2018-09-04 | 中国重型机械研究院股份公司 | A kind of step's flux type injection valve of multistage pressure control |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0750612Y2 (en) * | 1989-03-16 | 1995-11-15 | 株式会社小松製作所 | Pressure control valve |
-
1975
- 1975-01-20 SE SE7500585A patent/SE406800B/en not_active IP Right Cessation
- 1975-01-22 DK DK18175A patent/DK155548C/en not_active IP Right Cessation
- 1975-01-22 ES ES434051A patent/ES434051A1/en not_active Expired
- 1975-01-22 FR FR7501898A patent/FR2258579B1/fr not_active Expired
- 1975-01-22 IT IT4780375A patent/IT1026433B/en active
- 1975-01-23 GB GB296975A patent/GB1466022A/en not_active Expired
- 1975-01-23 JP JP50010139A patent/JPS5920911B2/en not_active Expired
- 1975-01-23 BG BG7528795A patent/BG29576A3/en unknown
- 1975-01-23 RO RO8120475A patent/RO64385A/en unknown
- 1975-01-23 PL PL17750675A patent/PL108692B1/en unknown
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1422456A1 (en) * | 2002-11-19 | 2004-05-26 | HydraForce, Inc. | Self-cleaning filter |
US7137406B2 (en) | 2002-11-19 | 2006-11-21 | Hydraforce, Inc. | Self-cleaning filter |
CN108488395A (en) * | 2018-05-30 | 2018-09-04 | 中国重型机械研究院股份公司 | A kind of step's flux type injection valve of multistage pressure control |
CN108488395B (en) * | 2018-05-30 | 2024-04-02 | 中国重型机械研究院股份公司 | Stepped flow type injection valve controlled by multistage pressure |
Also Published As
Publication number | Publication date |
---|---|
SE406800B (en) | 1979-02-26 |
JPS50124221A (en) | 1975-09-30 |
IT1026433B (en) | 1978-09-20 |
DK18175A (en) | 1975-10-27 |
FR2258579A1 (en) | 1975-08-18 |
ES434051A1 (en) | 1977-02-16 |
RO64385A (en) | 1979-07-15 |
DK155548C (en) | 1989-09-11 |
SE7500585L (en) | 1975-08-20 |
JPS5920911B2 (en) | 1984-05-16 |
DK155548B (en) | 1989-04-17 |
BG29576A3 (en) | 1980-12-12 |
FR2258579B1 (en) | 1982-02-19 |
PL108692B1 (en) | 1980-04-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |