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Asahi valve gaskets offer a unique double convex ring design that gives optimum sealing with only 1/3 the torque commonly required with flat faced gaskets. Asahi/America 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
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PTFE or PVDF-bonded EPDM for maximum corrosion resistance
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Perfect sealing at low bolt tightening torque ratings, longer gasket life
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Ideal for plastic piping systems, as well as metal or plastic-lined metal systems
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Working temperature:
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Approx. a 1/3 bolt tightening torque ratings as compared with flat or envelope type gasket.
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Thickness of bonded materials
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PTFE: All Sizes: 0.016" (0.4mm)
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PVDF: Sizes 1/2" - 2": 0.016" (0.4mm)
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PVDF: Sizes 3" - 10": 0.020" (0.5mm)
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PTFE-bonded gasket excellent for most corrosive chemicals.
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PVDF-bonded gasket is ideal for the following:
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1] Semi-conductor industry because of its purity
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2] Aggressive chemicals (strong acids, bases, halogens, etc.)
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3] Media that generates any volatile gas (PVDF gas permeation is only 1/50 of PTFE)
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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.
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- Sizes:
- 1) EPDM: 1/2" - 12"
- 2) PTFE-bonded EPDM: 1/2" - 12"
- 3) PVDF-bonded EPDM: 1/2" - 10" (Except 1-1/4" and 2-1/2")
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Chemical Processing
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Water & Wastewater
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Landfills
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Irrigation
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Food Processing
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Mining
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