| Name of part | Material |
|---|---|
| Body | Cast Iron/ Cast Steel |
| Disc | SGI, CF8, CF8M |
| Hinge pin, stop pin, spring | Stainless Steel (AISI 304) |
| Retainer | EN8, Stainless Steel |
| Body bearinf, plate bearing | Stainless Steel (AISI 304) |
| Hook Bearing | Carbon steel |
| Seat, Seal plug | Nitrile/ EPDM |