VALVE SEATS MADE FROM POLYMERS SUCH AS PTFE, TFM ETC (BOTH VIRGIN AND FILLED GRADES SUCH AS CARBON FILLED, GLASS FILLED, GLASS MOS2 FILLED, CALCIUM METASILICATE FILLED ET)
VALVE SEATS MADE FROM POLYMERS SUCH AS PTFE, TFM ETC (BOTH VIRGIN AND FILLED GRADES SUCH AS CARBON FILLED, GLASS FILLED, GLASS MOS2 FILLED, CALCIUM METASILICATE FILLED ET)