GB2003583A - Valve seal - Google Patents

Valve seal

Info

Publication number
GB2003583A
GB2003583A GB7834332A GB7834332A GB2003583A GB 2003583 A GB2003583 A GB 2003583A GB 7834332 A GB7834332 A GB 7834332A GB 7834332 A GB7834332 A GB 7834332A GB 2003583 A GB2003583 A GB 2003583A
Authority
GB
United Kingdom
Prior art keywords
stem
valve
polytetrafluoroethylene
graphite
seal
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.)
Granted
Application number
GB7834332A
Other versions
GB2003583B (en
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.)
Boeing North American Inc
Original Assignee
Rockwell International Corp
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 Rockwell International Corp filed Critical Rockwell International Corp
Publication of GB2003583A publication Critical patent/GB2003583A/en
Application granted granted Critical
Publication of GB2003583B publication Critical patent/GB2003583B/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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F16K5/22—Features relating to lubrication
    • F16K5/222—Features relating to lubrication for plugs with conical surfaces
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/02—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having conical surfaces; Packings therefor
    • F16K5/0257—Packings
    • F16K5/0285—Packings spindle sealing

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Devices (AREA)
  • Taps Or Cocks (AREA)
  • Details Of Valves (AREA)
  • Gasket Seals (AREA)
  • Sealing Material Composition (AREA)

Abstract

A valve 10 has at least one annular seal 56 surrounding a stem 18 to effect the seal between the stem and casing 12. Valving 110 and/or porting 100, is provided for introducing a pressure equal to or greater than the line pressure into a first chamber 76 whereby the pressure acts on an annular rim 48, to move the stem 18 in an axial direction to compress the annular seal(s) 56 which are alternate layers of polytetrafluoroethylene and graphite. The seals may be formed by winding ribbons of polytetrafluoroethylene 51 and graphite 53 on a former 55 to provide a ring which is then axially compressed before inserting into the valve 10. <IMAGE>
GB7834332A 1977-08-29 1978-08-23 Valve seal Expired GB2003583B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US82894777A 1977-08-29 1977-08-29

Publications (2)

Publication Number Publication Date
GB2003583A true GB2003583A (en) 1979-03-14
GB2003583B GB2003583B (en) 1982-02-17

Family

ID=25253142

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7834332A Expired GB2003583B (en) 1977-08-29 1978-08-23 Valve seal

Country Status (14)

Country Link
JP (1) JPS5447058A (en)
AR (1) AR219336A1 (en)
AU (1) AU526373B2 (en)
BE (1) BE870017A (en)
BR (1) BR7805586A (en)
CA (1) CA1092588A (en)
DE (1) DE2834336A1 (en)
FR (1) FR2402145A1 (en)
GB (1) GB2003583B (en)
IT (1) IT7827012A0 (en)
MX (1) MX147165A (en)
NL (1) NL7808853A (en)
SE (1) SE7809042L (en)
ZA (1) ZA784218B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2466645A (en) * 2008-12-31 2010-07-07 Aeon Internat Ltd Sealing device
CN108999973A (en) * 2018-10-11 2018-12-14 浙江大工阀门驱动有限公司 A kind of sealing device of threaded connection

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3039331A1 (en) * 1979-10-31 1981-05-14 Rockwell International Corp., 15219 Pittsburgh, Pa. VALVE ASSEMBLY
JPS626565U (en) * 1985-06-27 1987-01-16
US5129624A (en) * 1990-11-15 1992-07-14 M&Fc Holding Company, Inc. Valve stem sealing means for prevention of fugitive emissions

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1642431A (en) * 1924-08-04 1927-09-13 Crane Packing Co Manufacture of metallic packing
US2251211A (en) * 1939-11-15 1941-07-29 Garlock Packing Co Packing
US2819919A (en) * 1955-11-14 1958-01-14 James Walker And Company Ltd Metal packing for rotary and reciprocating shafts and the method of making the same
US3575379A (en) * 1969-08-01 1971-04-20 Walworth Co Encapsulated plug valve
US3586289A (en) * 1969-11-21 1971-06-22 Hills Mccanna Co Valve unit and stem packing assembly
DE2526182C2 (en) * 1975-06-12 1980-04-30 Sigri Elektrographit Gmbh, 8901 Meitingen Method of manufacturing a sealing ring
US4034776A (en) * 1975-10-24 1977-07-12 Rockwell International Corporation Balanced plug valve

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2466645A (en) * 2008-12-31 2010-07-07 Aeon Internat Ltd Sealing device
CN108999973A (en) * 2018-10-11 2018-12-14 浙江大工阀门驱动有限公司 A kind of sealing device of threaded connection

Also Published As

Publication number Publication date
FR2402145B1 (en) 1983-11-18
NL7808853A (en) 1979-03-02
MX147165A (en) 1982-10-19
IT7827012A0 (en) 1978-08-25
BR7805586A (en) 1979-04-17
ZA784218B (en) 1979-07-25
SE7809042L (en) 1979-03-01
DE2834336A1 (en) 1979-03-08
GB2003583B (en) 1982-02-17
FR2402145A1 (en) 1979-03-30
AR219336A1 (en) 1980-08-15
AU526373B2 (en) 1983-01-06
BE870017A (en) 1978-12-18
CA1092588A (en) 1980-12-30
JPS5447058A (en) 1979-04-13
AU3837478A (en) 1980-01-31

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee
728C Application made for restoration (sect. 28/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
728A Order made restoring the patent (sect. 28/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19980822