GB437327A - A relief valve device for maintaining constant pressure - Google Patents
A relief valve device for maintaining constant pressureInfo
- Publication number
- GB437327A GB437327A GB2011/35A GB201135A GB437327A GB 437327 A GB437327 A GB 437327A GB 2011/35 A GB2011/35 A GB 2011/35A GB 201135 A GB201135 A GB 201135A GB 437327 A GB437327 A GB 437327A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- chamber
- pressure
- piston
- spring
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/04—Control of fluid pressure without auxiliary power
- G05D16/10—Control of fluid pressure without auxiliary power the sensing element being a piston or plunger
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/024—Controlling the inlet pressure, e.g. back-pressure regulator
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Safety Valves (AREA)
Abstract
437,327. Relief valves. LAIDLAW, A. B. S., Calderwood Cottage, Lasswade, Midlothian. Jan. 21, 1935, No. 2011. [Class 135] A relief valve for oilburning and like fluidcirculating systems wherein a predetermined pressure is maintained, comprises two pistons 8, 12 of different area arranged in a common chamber 14 so as to act in opposition to one another through a spring or other resilient connection 13, the adjacent sides of the pistons being subject to a common pressure which is less than inlet pressure and the remote sides being maintained at inlet pressure. A shoulder 20 limits the displacement of the larger piston 12, the flow of fluid at inlet pressure to which is retarded by a needle valve 17 or other restriction. The valve member 7 formed on the piston 8 seats on a ported screw member 5. A passage 15 connects the chamber 14 to a bore 4 leading to the outlet. This passage may be dispensed with and the chamber 14 vented to the atmosphere. The initial compression of the spring 13 which determines the pressure at which the valve opens is adjustable by means of the screw 21 or the member 5. As fluid leaks past the valve 17 into the chamber 11, the compression of the spring 13 is increased, and hence also the pressure in the system, until the predetermined pressure is attained when the piston 12 abuts the shoulder 20. For fluids of great viscosity, the valve 17 may be replaced by a narrow clearance space between the upper part of the piston 12 and the wall of the chamber 11. This chamber may be connected by a pipe instead of the passage shown to the valve inlet, or alternatively directly to the discharge side of a pump in the system.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2011/35A GB437327A (en) | 1935-01-21 | 1935-01-21 | A relief valve device for maintaining constant pressure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2011/35A GB437327A (en) | 1935-01-21 | 1935-01-21 | A relief valve device for maintaining constant pressure |
Publications (1)
Publication Number | Publication Date |
---|---|
GB437327A true GB437327A (en) | 1935-10-28 |
Family
ID=9732018
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2011/35A Expired GB437327A (en) | 1935-01-21 | 1935-01-21 | A relief valve device for maintaining constant pressure |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB437327A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1157452B (en) * | 1957-02-08 | 1963-11-14 | Hermann Schwarz Kommanditgesel | Pressure relief valve with an elastic ring as an adjusting spring |
US4653527A (en) * | 1985-10-21 | 1987-03-31 | Modular Controls Corporation | Pressure relief valve |
FR2601749A1 (en) * | 1986-07-18 | 1988-01-22 | Elbi Int Spa | FLOW REGULATOR, PARTICULARLY FOR WASHING MACHINES |
GB2194311A (en) * | 1986-08-19 | 1988-03-02 | Fort Vale Eng Ltd | Valves |
EP0299928A2 (en) * | 1987-07-17 | 1989-01-18 | OLEOSTAR S.r.L. | A priority flow control valve for hydraulic power circuits |
FR2744261A1 (en) * | 1996-01-25 | 1997-08-01 | B R L Exploit | Device permitting addition of programmable flow controller to pressure regulator |
WO2012032298A1 (en) * | 2010-09-11 | 2012-03-15 | Bifold Fluidpower Limited | A flow control device |
-
1935
- 1935-01-21 GB GB2011/35A patent/GB437327A/en not_active Expired
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1157452B (en) * | 1957-02-08 | 1963-11-14 | Hermann Schwarz Kommanditgesel | Pressure relief valve with an elastic ring as an adjusting spring |
US4653527A (en) * | 1985-10-21 | 1987-03-31 | Modular Controls Corporation | Pressure relief valve |
FR2601749A1 (en) * | 1986-07-18 | 1988-01-22 | Elbi Int Spa | FLOW REGULATOR, PARTICULARLY FOR WASHING MACHINES |
GB2194311A (en) * | 1986-08-19 | 1988-03-02 | Fort Vale Eng Ltd | Valves |
GB2194311B (en) * | 1986-08-19 | 1990-05-16 | Fort Vale Eng Ltd | Improvements in or relating to valves |
EP0299928A2 (en) * | 1987-07-17 | 1989-01-18 | OLEOSTAR S.r.L. | A priority flow control valve for hydraulic power circuits |
EP0299928A3 (en) * | 1987-07-17 | 1990-01-10 | Oleostar S.R.L. | A priority flow control valve for hydraulic power circuits |
FR2744261A1 (en) * | 1996-01-25 | 1997-08-01 | B R L Exploit | Device permitting addition of programmable flow controller to pressure regulator |
WO2012032298A1 (en) * | 2010-09-11 | 2012-03-15 | Bifold Fluidpower Limited | A flow control device |
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