Standard seat: PTFE with 25% of glass fibre, which provides the best balance of mechanical, electrical and chemical properties and a good wear and friction behavior. It resists acids and alkalis, except hydrofluoric acid and strong alkali. If it is required for special applications, there is a wide range of PTFE-based polymers, F-316, graphite and virgin PTFE
PTFE + metal ring: Fire Safe
Low operation torque
Wafer: One-piece body with four centering lugs which allows installation between flanges at intermediate points in the pipeline.