GB492878A - Improvements in or relating to high lift safety valves for steam boilers - Google Patents
Improvements in or relating to high lift safety valves for steam boilersInfo
- Publication number
- GB492878A GB492878A GB10404/38A GB1040438A GB492878A GB 492878 A GB492878 A GB 492878A GB 10404/38 A GB10404/38 A GB 10404/38A GB 1040438 A GB1040438 A GB 1040438A GB 492878 A GB492878 A GB 492878A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chamber
- pressure
- valve
- spring
- counter
- 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
- F16K17/08—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 special arrangements for providing a large discharge passage
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
492,878. Safety valves. KNORRBREMSE AKT.-GES. April 5, 1938, No. 10404. Convention date, April 12, 1937. [Class 135] In a high-lift safety valve of the kind in which the pressure in a huddling chamber a above the valve seat is opposed by the pressure in a counter chamber d to which steam is normally admitted when the valve opens, as well as by the loading spring m, a controlling device c is provided which delays the filling of the counter pressure chamber d until the pressure in the huddling chamber a and hence the boiler pressure has fallen to the desired value. The device c has a spring-closed valve e in the pipe connection v, f between the chambers a, d. When the safety valve opens initially, the pressure in the huddling chamber a has access through the pipe b to a chamber k containing a spring-loaded diaphragm or bellows h which is thereby raised from the control valve e so that the latter closes. The loading spring i is stronger than the valve spring g, but to accelerate the opening of the control valve, the interior or upper side of the bellows or diaphragm is connected by a branch l to the pipe f and is hence subject to the pressure in the counter chamber immediately the valve e opens. The chamber k may have a vent n.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE492878X | 1937-04-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB492878A true GB492878A (en) | 1938-09-28 |
Family
ID=6544477
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB10404/38A Expired GB492878A (en) | 1937-04-12 | 1938-04-05 | Improvements in or relating to high lift safety valves for steam boilers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB492878A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2477720A (en) * | 1944-04-17 | 1949-08-02 | Caserta Michele | Pressure adjusting device |
CN103267154A (en) * | 2013-03-20 | 2013-08-28 | 潘健 | Piston-and-spring combined-type double-constant-value safety valve |
-
1938
- 1938-04-05 GB GB10404/38A patent/GB492878A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2477720A (en) * | 1944-04-17 | 1949-08-02 | Caserta Michele | Pressure adjusting device |
CN103267154A (en) * | 2013-03-20 | 2013-08-28 | 潘健 | Piston-and-spring combined-type double-constant-value safety valve |
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