ASAHI PTFE/EPDM Low Torgue AV Gasket 
 

ASAHI PTFE/EPDM Low Torgue AV Gasket  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".
Features and Benefits

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 - 195 DEG C
PTFE-bonded: - 40 - 250 DEG C
PVDF-bonded: - 40 - 250 DEG C

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 Materials .

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")