GB793980A - Vacuum control valve device - Google Patents
Vacuum control valve deviceInfo
- Publication number
- GB793980A GB793980A GB35100/55A GB3510055A GB793980A GB 793980 A GB793980 A GB 793980A GB 35100/55 A GB35100/55 A GB 35100/55A GB 3510055 A GB3510055 A GB 3510055A GB 793980 A GB793980 A GB 793980A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- diaphragm
- chamber
- pressure
- plane
- 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
- G05D16/06—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule
- G05D16/063—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane
- G05D16/0644—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator
- G05D16/0663—Control of fluid pressure without auxiliary power the sensing element being a flexible membrane, yielding to pressure, e.g. diaphragm, bellows, capsule the sensing element being a membrane the membrane acting directly on the obturator using a spring-loaded membrane with a spring-loaded slideable obturator
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Reciprocating Pumps (AREA)
Abstract
793,980. Fluid-actuated valves. INGENIORSFIRMAN FLIESBERG AKTIEBOLAG. Dec. 7, 1955 [Dec. 23, 1954], No. 35100/55. Class 135. A vacuum control valve comprises a valve body 1 having connections 2, 4 with a vacuum pump and a space to be evacuated, respectively, first and second valve members 13, 28 urged towards their respective seats by springs 32, 29, a rod 21 on which the valve members independently slide, loaded at one end by a spring 23 and connected at its other end to a diaphragm 15 (or bellows), and a throttled connection 17 between the valve body chamber 1a and a chamber 19 above the diaphragm. The valve member 13 is constituted by a double-beat valve comprising plane and conical valve members 11, 12 coacting with conical and plane valve seats 9, 10 respectively: the plane valve member just passing through the plane valve seat so that when the valve members are seated they are pressure-balanced. Nuts 31 and a sleeve 30 permit adjustment, so that the valve members 13, 28 may both be seated when the diaphragm 15 is unstressed. On the pressure in the chamber 1a falling below the desired subpressure the diaphragm will be raised against the spring 23 to unseat the valve member 28 to admit atmospheric air from below the diaphragm directly to the chamber 1a to reduce the tendency of the diaphragm to oscillate. On the pressure in the chamber 1a rising above the desired sub-pressure the diaphragm 15 will be lowered to unseat the valve member 13 to connect the pump to the space being evacuated.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE793980X | 1954-12-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB793980A true GB793980A (en) | 1958-04-23 |
Family
ID=20339727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB35100/55A Expired GB793980A (en) | 1954-12-23 | 1955-12-07 | Vacuum control valve device |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB793980A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1987007535A1 (en) * | 1986-06-06 | 1987-12-17 | Nelson Irrigation Corporation | Access assembly for underground irrigation system and accessing assembly cooperable therewith |
| US4809910A (en) * | 1986-06-06 | 1989-03-07 | Nelson Irrigation Corporation | Apparatus for providing a semiautomatic irrigation system |
-
1955
- 1955-12-07 GB GB35100/55A patent/GB793980A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1987007535A1 (en) * | 1986-06-06 | 1987-12-17 | Nelson Irrigation Corporation | Access assembly for underground irrigation system and accessing assembly cooperable therewith |
| US4730773A (en) * | 1986-06-06 | 1988-03-15 | Nelson Irrigation Corporation | Access assembly for underground irrigation systems and accessing assembly cooperable therewith |
| US4809910A (en) * | 1986-06-06 | 1989-03-07 | Nelson Irrigation Corporation | Apparatus for providing a semiautomatic irrigation system |
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