These gaskets incorporate a silicone o-ring to regulate compression in the innermost diameter of the gasket, and also allow for flange and mounting irregularities.  The silicone has a large temperature range where it remains pliable, so it is able to help support the PTFE sleeve in a wide range of services.  The higher durometer non-asbestos filler means the silicone o-ring portion of the gasket will be placed under compression but not flattened completely, allowing it to function as a good base between the valve and piping flanges and the PTFE sleeve. Testing has shown that the silicone o-ring backed version of the gaskets has a higher sealability, and is more forgiving than gaskets with only the standard non-asbestos backing.
        
                    Unit of Measure
                    
               
        
            | Package Type | N/A Each | 
| Units Per Package | N/A 1 | 
| Size | N/A 2 " | 
| Body Material | N/A PTFE / N/A Env w/Internal Oring | 
| Vendor Item # | N/A RGA202TF | 
| Weight | N/A .01 lb | 
| No. of Holes | N/A 6 | 
| N/A To achieve maximum sealing capability, proper installation procedure must be followed. PTFE gaskets require re-torque after initial installation. See maintenance manual MM-FG001. | 
 
									  