Thermoplastic Valves
AV Gaskets & Backing Rings
AV Gaskets (1/2″ – 12″)
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″.
AV low torque gaskets provide a bubble tight seal for flanged valve and piping connections. They feature a small bolt torque requirement for ease of installation and for accommodating a variety of thermoplastic valves, piping and fittings. All styles include two molded concentric sealing rings for confident sealing abilities. The sulfur-cured rubber is made to fit with flat faced flanges and is available with either a PVDF or PTFE laminated sealing surface for aggressive chemical or high purity installations.
Backing Rings (Euro Grey: 1/2″ – 12″; Black: 1/2″ – 24″)
Flange connections are an essential part of every piping system. For detachable connections to butterfly valves or transitions to other materials, Asahi/America’s backing rings, installed with plastic stub end flanges, are the ideal solution to provide a mechanical-locking connection offering superior safety for any system.
Resources:
Data Sheets
Specifications
Ideal Applications Include:
Chemical processing, bleach plants, aquariums, mining, water treatment, landfills, swimming pools, power plants
Specifications:
AV Gasket Sizes:
1/2″ – 12″
Materials:
EPDM, PVDF-bonded EPDM, PTFE-bonded EPDM
Bolt Patterns:
ANSI 150#
Backing Rings Sizes:
Euro Grey: 1/2″ – 12″
Black: 1/2″ – 24″
Materials:
PP with steel insert
Bolt Patterns:
ANSI 150#
JIS and DIN also available
AV Gaskets
- PTFE- or PVDF-bonded EPDM for maximum corrosion resistance and high fluid purity
- Perfect sealing at low bolt tightening torque ratings for longer gasket life
- Ideal for plastic piping systems, as well as metal or plastic-lined metal systems
- Sulfur cured
- Approximately 1/3 of the bolt tightening torque compared with flat or envelope type gasket
- PTFE-bonded gasket available for the most corrosive applications
- PVDF-bonded gasket ideal for the following:
- Semiconductor industry due to its purity
- Aggressive chemicals (strong acids, bases, halogens)
- Volatile media (fluids that generate gas): PVDF has a permeability of about 1/50th of PTFE
- Proprietary laminating process for bonding to EPDM that allows for the greater elasticity required for low torque gaskets
Backing Rings
- Fiberglass reinforced PP coated steel
- Available in UV resistant black or Euro grey PP
- Sized specifically for DIN metric piping
- Standard stock of ANSI 150# bolt pattern
- JIS and DIN patterns available