Selecting a Posi-flate Seat Elastomer

Before selecting a Posi-flate seat, the following factors must be considered:

• Temperature
  Physical characteristics and chemical resistance of elastomers are affected by the operating temperature of the part in use. Each Posi-flate seat is tested and rated for a minimum and maximum operating temperature. This is determined by the elastomer's resistance to compression set, rebound and tensile strength.
   
• Pressure
  Posi-flate seats are designed for specific pressure ranges. For each Posi-flate application, the required seat inflation pressure must be within the minimum and maximum of the seat. (The actual seat inflation pressure must also exceed line pressure by a minumum of 15 PSIG.)
   
• Chemical Compatability
  Posi-flate offers a variety of elastomers to achieve compatibility with most chemicals. When selecting an elastomer, we recommend using an elastomer with "excellent" ratings (please reference Elastomer and Chemical Compatibility Chart).

It is always best to test an elastomer prior to putting it to use. Upon request, Posi-flate will supply free test samples of seat elastomers.