GB755704A - Improvements in safety valves - Google Patents
Improvements in safety valvesInfo
- Publication number
- GB755704A GB755704A GB29216/54A GB2921654A GB755704A GB 755704 A GB755704 A GB 755704A GB 29216/54 A GB29216/54 A GB 29216/54A GB 2921654 A GB2921654 A GB 2921654A GB 755704 A GB755704 A GB 755704A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- valve
- spring
- chambers
- chamber
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
755,704. Fluid-pressure servomotor-control systems. DEWRANCE & CO., Ltd. Oct. 11, 1954 [Oct. 9, 1953], No. 29216/54. Class 135. A spring-loaded safety valve is opened by the pressure within a space coaxial with the valve spindle 18 and sealed at its ends by flexible parts connected with the valve spindle, the pressure within the space being controlled by a pressure-actuated auxiliary valve 41 and being limited to a maximum value which is low compared with the pressure of the controlled fluid. As shown the space comprises two chambers 6, 7 communicating with each other through an apertured web 10 in a hollow distance piece 16 separating the valve casing from the spring housing 14. The chamber 7 is sealed by a bellows 17 to the spindle 18 and the chamber 6 is similarly sealed by a diaphragm 4 clamped centrally between plates 5, 12 and peripherally between the housing 14 and the distance piece 16. The valve disc 2 co-operates with an inlet piece 1 and carries a piston-like member 30 working in a guide 3. The chambers 6, 7 are formed with ports 32, 33 closed by removable plugs. The compression of the loading spring 13 may be adjusted by a threaded member 22. The chambers 6, 7 are filled with liquid through a pipe 31 from an annular chamber 15 surrounding the spring 13. A pressure regulated by the auxiliary valve 41 is applied to the chamber 15 through a pipe 40. The outlet of the auxiliary valve 41 is also connected through an adjustable throttle 25 with a low-pressure discharge branch 24. The auxiliary valve which is loaded by a spring 27 and a weight 26 both acting through a lever is connected with the boiler drum or other source of pressure to be controlled by a line 23 containing a stop valve 28. The spring 13 is adjusted to exert a closing force somewhat in excess of the normal operating pressure of the valve but not above the safety limits of the apparatus to be protected. The throttle 25 is adjusted so that the pressure rise which takes place in the pipe 40 and therefore in the chambers 6, 7 when the normal operating pressure is reached and the auxiliary valve opens supplements the fluid pressure acting directly on the valve disc and so overcomes the spring 13.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE755704X | 1953-10-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB755704A true GB755704A (en) | 1956-08-22 |
Family
ID=6659679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29216/54A Expired GB755704A (en) | 1953-10-09 | 1954-10-11 | Improvements in safety valves |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB755704A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764167A (en) * | 2017-11-09 | 2019-05-17 | 赵斌 | Reduction of heat impacts safety valve |
| CN110394034A (en) * | 2019-07-02 | 2019-11-01 | 珠海市思卡净化技术有限公司 | A kind of compressed air cleaner and its discharge control method |
-
1954
- 1954-10-11 GB GB29216/54A patent/GB755704A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764167A (en) * | 2017-11-09 | 2019-05-17 | 赵斌 | Reduction of heat impacts safety valve |
| CN109764167B (en) * | 2017-11-09 | 2020-06-05 | 赵斌 | Heat shock reducing safety valve |
| CN110394034A (en) * | 2019-07-02 | 2019-11-01 | 珠海市思卡净化技术有限公司 | A kind of compressed air cleaner and its discharge control method |
| CN110394034B (en) * | 2019-07-02 | 2022-07-26 | 珠海市思卡净化技术有限公司 | Compressed air purifier and emission control method thereof |
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