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GB578022A - Improvements in or relating to stop valves - Google Patents

Improvements in or relating to stop valves

Info

Publication number
GB578022A
GB578022A GB117744A GB117744A GB578022A GB 578022 A GB578022 A GB 578022A GB 117744 A GB117744 A GB 117744A GB 117744 A GB117744 A GB 117744A GB 578022 A GB578022 A GB 578022A
Authority
GB
United Kingdom
Prior art keywords
stem
piston
casing
disc
bore
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
GB117744A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB117744A priority Critical patent/GB578022A/en
Publication of GB578022A publication Critical patent/GB578022A/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
    • F16K39/00—Devices for relieving the pressure on the sealing faces
    • F16K39/02—Devices for relieving the pressure on the sealing faces for lift valves
    • F16K39/024—Devices for relieving the pressure on the sealing faces for lift valves using an auxiliary valve on the main valve

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

578,022. Valves. ALLEY, S. E. Jan. 21, 1944, No. 1177. [Class 135] A stop valve comprises a piston 20 movable in a casing 13 having ports 19 and provided with a disc 23 of hard corrosion-resisting material adapted to close the end of the casing. A pilot valve 28 adapted to seat on the disc is carried by a stem 27, the other end of which is engaged by an actuating member 33, lost motion being provided between a flange 31 on the stem and the piston 20. The stem is movable in a bore in the piston which forms a pressure balancing passage by fluting the stem or grooving the bore. The pilot valve is adjustable on its stem and the piston 20 has a conical formation 25 to ensure that there is no substantial passage of fluid until the disc 23 is well clear of the casing 13.
GB117744A 1944-01-21 1944-01-21 Improvements in or relating to stop valves Expired GB578022A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB117744A GB578022A (en) 1944-01-21 1944-01-21 Improvements in or relating to stop valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB117744A GB578022A (en) 1944-01-21 1944-01-21 Improvements in or relating to stop valves

Publications (1)

Publication Number Publication Date
GB578022A true GB578022A (en) 1946-06-12

Family

ID=9717495

Family Applications (1)

Application Number Title Priority Date Filing Date
GB117744A Expired GB578022A (en) 1944-01-21 1944-01-21 Improvements in or relating to stop valves

Country Status (1)

Country Link
GB (1) GB578022A (en)

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