Asahi/America, Inc.
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Thermoplastic Valve Gaskets

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Asahi/America valve gaskets offer a unique double convex ring design that gives optimum sealing with only one third the torque commonly required with flat faced gaskets. Asahi offers EPDM gaskets from 1/2" to 12"; PTFE-bonded EPDM gaskets in sizes from 1/2" to 12"; and PVDF-bonded EPDM gaskets from 1/2" to 10".

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  • EPDM - durometer A, hardness 65 - 68
  • PTFE or PVDF-bonded EPDM for maximum corrosion resistance
  • Perfect sealing at low bolt tightening torque ratings; longer gasket life
  • Ideal for plastic piping systems, as well as metal or plastic-lined metal systems
  • Working temperature:
    • EPDM: - 40 - 195º F
    • PTFE-bonded: - 40 - 250º F
    • PVDF-bonded: - 40 - 250º F
  • Approximately one third bolt tightening torque ratings as compared with flat or envelope type gasket
  • Thickness of bonded materials
    • PTFE: All Sizes: 0.016" (0.4mm)
    • PVDF:Sizes 1/2" - 2": 0.016" (0.4mm)
    • PVDF:Sizes 3" - 10": 0.020" (0.5mm)
  • PTFE-bonded gasket excellent for most corrosive chemicals
  • PVDF-bonded gasket is ideal for the following:
    • Semi-conductor industry, because of its purity
    • Aggressive chemicals (strong acids, bases, halogens, etc.)
    • Media that generates any volatile gas (PVDF gas permeation is only 1/50 of PTFE)
  • Both the PTFE and PVDF-bonded gaskets employ a proprietary laminating process for bonding to EPDM, providing the greater elasticity required for lower sealing torques
  • Sizes:
    • EPDM: 1/2" - 12"
    • PTFE-bonded EPDM: 1/2" - 12"
    • PVDF-bonded EPDM: 1/2" - 10" (except 1 1/4" and 2 1/2")
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