GB921178A - Improvements in throttling valves - Google Patents
Improvements in throttling valvesInfo
- Publication number
- GB921178A GB921178A GB1432961A GB1432961A GB921178A GB 921178 A GB921178 A GB 921178A GB 1432961 A GB1432961 A GB 1432961A GB 1432961 A GB1432961 A GB 1432961A GB 921178 A GB921178 A GB 921178A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sleeve
- cylinder
- port
- valve member
- seat
- 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
- 230000003628 erosive effect Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 abstract 1
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
- F16K25/00—Details relating to contact between valve members and seats
- F16K25/04—Arrangements for preventing erosion, not otherwise provided for
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Check Valves (AREA)
Abstract
921,178. Valves. LESLIE CO. April 20, 1961 [Feb. 17, 1961], No. 14329/61. Class 135. A valve comprises a body 1, an inlet 2, an outlet 3, a seat 4, a valve member 11 mounted on a stem 12, a sleeve 13 having a bore slightly greater than the outside diameter of the stem and axially locked thereto for movement towards and away from the seat, and a cylinder 7 having a port 19 facing the outlet 3, the sleeve closing the port when the valve member is within a predetermined distance of the seat and exposing the port as the valve member moves beyond said distance, the clearance between the bore of the sleeve and the outside of the valve stem being greater than the clearance between the sleeve and the cylinder. The sleeve is retained on the valve member 11 between a shoulder 14 and a ring 15, and slides within the cylinder 7. The sleeve is prevented from rotation relative to the valve member 11 by keys 23 engaging keyways 24 in the sleeve; additional keyways may be provided so that the sleeve may be repositioned when wear takes place. In operation, when the valve member is lifted off its seat flow does not take place through the outlet 3 until the bottom edge of the sleeve starts to uncover the port 19 in the cylinder 7 thus preventing erosion of the seat 4. Due to clearance 16<SP>1</SP> being provided between the bore of the sleeve and the valve member, upon initial opening of the valve 11, the sleeve is pressed against the cylinder to prevent flow through the port 19. In the modification shown in Fig. 6, the sleeve is split into two portions 30, 31, the portion 31 being pressed into contact with the cylinder as previously described. The cylinder may be provided with a second port 19, Fig. 1, so that the cylinder may be inverted when wear takes place in the other port 19.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US9008861A | 1961-02-17 | 1961-02-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB921178A true GB921178A (en) | 1963-03-13 |
Family
ID=22221289
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1432961A Expired GB921178A (en) | 1961-02-17 | 1961-04-20 | Improvements in throttling valves |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB921178A (en) |
-
1961
- 1961-04-20 GB GB1432961A patent/GB921178A/en not_active Expired
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