- Body: Cast Iron (CI) / Ductile Iron (DI)
- Disc: CF8M Stainless Steel with PTFE coating (CF8M+PTFE) – excellent corrosion resistance
- Liner/Seat: PTFE – perfect sealing and high chemical resistance
- Upper Shaft: Optional SS410 / SS304 / SS316
- Lower Shaft: SS410
- Bushing: PTFE