GB921178A - Improvements in throttling valves - Google Patents

Improvements in throttling valves

Info

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
Application number
GB1432961A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Leslie Co
Original Assignee
Leslie Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Leslie Co filed Critical Leslie Co
Publication of GB921178A publication Critical patent/GB921178A/en
Expired legal-status Critical Current

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
    • 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.
GB1432961A 1961-02-17 1961-04-20 Improvements in throttling valves Expired GB921178A (en)

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)

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