GB431438A - Improvements in or relating to screw-down stop valves - Google Patents
Improvements in or relating to screw-down stop valvesInfo
- Publication number
- GB431438A GB431438A GB2877734A GB2877734A GB431438A GB 431438 A GB431438 A GB 431438A GB 2877734 A GB2877734 A GB 2877734A GB 2877734 A GB2877734 A GB 2877734A GB 431438 A GB431438 A GB 431438A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- spindle
- seating
- screwed
- pressure
- 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
- F16K43/00—Auxiliary closure means in valves, which in case of repair, e.g. rewashering, of the valve, can take over the function of the normal closure means; Devices for temporary replacement of parts of valves for the same purpose
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Preventing Unauthorised Actuation Of Valves (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
431,438. Valves. PEEL, D. P., 21, Warwick Road, South Shields. Oct. 8, 1934, No. 28777. [Class 135] A screw - down feedwater valve for boilers is provided with means whereby it may be operated even if the spindle 17 breaks. Normally the spindle 17 is operated by the screwed handwheel 25 mounted by a flanged bush 23 in the fixed cross - head 7, the spindle being prevented from rotating by a key 13 on the valve - member 11 engaging slots 15 in a cylinder 9. The interior of the casing 1 is connected to the feed-water pump and the outlet 2 to the boiler. Normally the auxiliary valve 41 is screwed on to its upper seating, so that the pump pressure is applied through passages 47, 48 to the rear of the valve 11. If the spindle breaks, the valve 11 is closed by holding the handle 29 and operating the wheel 25, and the auxiliary valve 41 is screwed down to the position shown, thus opening the rear face of the valve 11 to atmosphere through the passages 48, 51. When the upper part of the spindle is again raised, the valve 11 opens. Owing to the pressure below it and the absence of pressure above it, and the valve then remains open, even during the pressure stroke of the pump. In the open position, a seating 35 on the back of the valve 11 engages a seating 37 on the valve casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2877734A GB431438A (en) | 1934-10-08 | 1934-10-08 | Improvements in or relating to screw-down stop valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2877734A GB431438A (en) | 1934-10-08 | 1934-10-08 | Improvements in or relating to screw-down stop valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB431438A true GB431438A (en) | 1935-07-08 |
Family
ID=10280987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2877734A Expired GB431438A (en) | 1934-10-08 | 1934-10-08 | Improvements in or relating to screw-down stop valves |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB431438A (en) |
-
1934
- 1934-10-08 GB GB2877734A patent/GB431438A/en not_active Expired
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