GB341941A - Improvements in or relating to valve discs, gaskets, and similar articles - Google Patents

Improvements in or relating to valve discs, gaskets, and similar articles

Info

Publication number
GB341941A
GB341941A GB31727/29A GB3172729A GB341941A GB 341941 A GB341941 A GB 341941A GB 31727/29 A GB31727/29 A GB 31727/29A GB 3172729 A GB3172729 A GB 3172729A GB 341941 A GB341941 A GB 341941A
Authority
GB
United Kingdom
Prior art keywords
resinoid
articles
asbestos
valve discs
gaskets
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
GB31727/29A
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.)
Bakelite Corp
Original Assignee
Bakelite 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 Bakelite Corp filed Critical Bakelite Corp
Publication of GB341941A publication Critical patent/GB341941A/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
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Sealing Material Composition (AREA)
  • Gasket Seals (AREA)

Abstract

Valve discs, gaskets, and similar articles, are moulded from a composition consisting of asbestos in a spun or woven condition impregnated with a potentially reactive resinoid, for example, a phenolic resinoid or cresol-formaldehyde. The asbestos material is preferably first impregnated with the binder and then subjected to preliminary heating, for example to 85 DEG C., to eliminate the solvent. For valve discs, superposed blanks of this material are then subjected to a pressure of 5000 to 9000 lbs. per square inch in a cold state in a mould which is subsequently heated to 125 DEG to 160 DEG C. to convert the resinoid to an insoluble and infusible form. There is preferably about 25 to 45 per cent by weight of resinoid in the finished articles. The resinoid may, moreover, be applied wholly or in part in a pulverized form. In place of the woven asbestos there may be substituted, particularly for the inner portions of the articles, a mass of loose thread ends obtained by shearing the woven fabric after impregnation. A lubricant, such as butyl stearate, may be incorporated in the resinoid binder to facilitate the discharges of the articles, whilst hot, from the mould.
GB31727/29A 1928-10-19 1929-10-18 Improvements in or relating to valve discs, gaskets, and similar articles Expired GB341941A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US341941XA 1928-10-19 1928-10-19

Publications (1)

Publication Number Publication Date
GB341941A true GB341941A (en) 1931-01-19

Family

ID=21874885

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31727/29A Expired GB341941A (en) 1928-10-19 1929-10-18 Improvements in or relating to valve discs, gaskets, and similar articles

Country Status (1)

Country Link
GB (1) GB341941A (en)

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