CA2184620A1 - Low friction packing - Google Patents

Low friction packing

Info

Publication number
CA2184620A1
CA2184620A1 CA002184620A CA2184620A CA2184620A1 CA 2184620 A1 CA2184620 A1 CA 2184620A1 CA 002184620 A CA002184620 A CA 002184620A CA 2184620 A CA2184620 A CA 2184620A CA 2184620 A1 CA2184620 A1 CA 2184620A1
Authority
CA
Canada
Prior art keywords
packing
low friction
valve stem
fire safety
low
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
CA002184620A
Other languages
French (fr)
Other versions
CA2184620C (en
Inventor
Michel K. Lovell
Randall S. Jackson
Ronald R. Brestel
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.)
Fisher Controls International LLC
Original Assignee
Michel K. Lovell
Randall S. Jackson
Ronald R. Brestel
Fisher Controls International, Inc.
Fisher Controls International Llc
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
Priority claimed from US08/204,637 external-priority patent/US5593166A/en
Application filed by Michel K. Lovell, Randall S. Jackson, Ronald R. Brestel, Fisher Controls International, Inc., Fisher Controls International Llc filed Critical Michel K. Lovell
Publication of CA2184620A1 publication Critical patent/CA2184620A1/en
Application granted granted Critical
Publication of CA2184620C publication Critical patent/CA2184620C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F16K41/00—Spindle sealings
    • F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
    • F16K41/04—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings

Abstract

A two-part, low friction, live loaded packing system for fire safety and low fugitive emission sealing (less than 500 ppm) of a valve stem at operating temperatures up to 450°F (232°C). One lower packing ring set around the valve stem has PTFE washers sandwiched between flexible graphite rings to provide fire safety and low friction. An upper packing ring set around the valve stem is closer to the loading source and has V-type PTFE rings to provide reliable low fugitive emission sealing and low friction. The live loading is optimized to maintain a seal at the upper packing set to less than 500 ppm leakage, minimize packing friction from both the upper and lower packing sets, and seal the lower packing set during fire safety tests.
CA002184620A 1994-03-02 1995-02-09 Low friction packing Expired - Lifetime CA2184620C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/204,637 1994-03-02
US08/204,637 US5593166A (en) 1994-03-02 1994-03-02 Low friction packing
PCT/US1995/001617 WO1995023935A1 (en) 1994-03-02 1995-02-09 Low friction packing

Publications (2)

Publication Number Publication Date
CA2184620A1 true CA2184620A1 (en) 1995-09-08
CA2184620C CA2184620C (en) 2006-09-19

Family

ID=37056968

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002184620A Expired - Lifetime CA2184620C (en) 1994-03-02 1995-02-09 Low friction packing

Country Status (1)

Country Link
CA (1) CA2184620C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108006314A (en) * 2017-12-01 2018-05-08 中国寰球工程有限公司 Cryogenic ball valve fugacity combined stuffing structure
CN109827005A (en) * 2019-03-29 2019-05-31 湖北泰和石化设备有限公司 A kind of cryogenic valve fugacity composite filling structure and encapsulating method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2586274A (en) * 2019-08-16 2021-02-17 Oliver Twinsafe Valves Ltd Valve with sealing system
US20220235865A1 (en) * 2021-01-22 2022-07-28 Allegheny Valve & Coupling, Inc. Gate valve arrangement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108006314A (en) * 2017-12-01 2018-05-08 中国寰球工程有限公司 Cryogenic ball valve fugacity combined stuffing structure
CN109827005A (en) * 2019-03-29 2019-05-31 湖北泰和石化设备有限公司 A kind of cryogenic valve fugacity composite filling structure and encapsulating method

Also Published As

Publication number Publication date
CA2184620C (en) 2006-09-19

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Effective date: 20150209