GB968377A - Improvements relating to valves for light load protection of boiler feed pumps - Google Patents
Improvements relating to valves for light load protection of boiler feed pumpsInfo
- Publication number
- GB968377A GB968377A GB3255960A GB3255960A GB968377A GB 968377 A GB968377 A GB 968377A GB 3255960 A GB3255960 A GB 3255960A GB 3255960 A GB3255960 A GB 3255960A GB 968377 A GB968377 A GB 968377A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- valves
- chambers
- open
- piston
- 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
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D5/00—Controlling water feed or water level; Automatic water feeding or water-level regulators
- F22D5/18—Controlling water feed or water level; Automatic water feeding or water-level regulators for varying the speed or delivery pressure of feed pumps
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Driven Valves (AREA)
Abstract
968,377. Fluid-pressure servomotor systems. HOPKINSONS Ltd. Sept. 20, 1961 [Sept. 22, 1960], No. 32559/60. Heading G3P. A leak-off valve for a boiler feed pump which opens when the discharge from the pump falls below a predetermined level comprises a valve housing 1 having a flow passage controlled by a sliding gate. The valve member comprises loaded discs 10, 11 which, in the closed position shown, allows inlet pressure to flow into the valve housing and act on the inner forces of pistons 16, 17 and pass to outer chambers P 1 , P 2 through throttled passages 30. The chambers P 1 , P 2 are connected by lines 27, 28 to a relay valve 29 comprising two valves C 1 , C 2 which when open connect the chambers to drain. The relay valve is actuated by a solenoid 34 which is deenergized when the pump outflow falls below a predetermined valve to open valve C 1 and close valve C 2 . Chamber P 2 is then open to drain and the pressure acting on the inner face of piston 17 opens the valve at a rate controlled by the throttled passage 30 of piston 16. When the valve is opened, a straight through flow is provided by orifice 18. Valves 21, 22 at opposite ends of the piston rod close lines 27, 28 at the extreme positions to prevent loss of actuating liquid,
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3255960A GB968377A (en) | 1960-09-22 | 1960-09-22 | Improvements relating to valves for light load protection of boiler feed pumps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3255960A GB968377A (en) | 1960-09-22 | 1960-09-22 | Improvements relating to valves for light load protection of boiler feed pumps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB968377A true GB968377A (en) | 1964-09-02 |
Family
ID=10340522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3255960A Expired GB968377A (en) | 1960-09-22 | 1960-09-22 | Improvements relating to valves for light load protection of boiler feed pumps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB968377A (en) |
-
1960
- 1960-09-22 GB GB3255960A patent/GB968377A/en not_active Expired
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