| Components in Contact With Line Fluids |
| Component |
Material Designation |
Temperature Range |
Disc
(2) |
Ductile Iron, Nickel Plated |
-4°F, Upper temperature limited by seat |
| Ductile Iron, Rilsan Coated |
-4°F to +176°F |
| Ductile Iron, ECTFE Coated |
-4°F, Upper temperature limited by seat |
| Aluminum Bronze |
Limited by seat |
| Stainless Steel |
Limited by seat |
| Duplex Steel |
Limited by seat |
| Hastelloy C 4C |
Limited by seat |
| Hastelloy C 22C |
Limited by seat |
| Ductile Iron, Hostalen GUR Lined |
Minus Temperature limited by seat, to +158°F |
Seat
(3) |
Nitrile (Copolymer of Butadiene + Acrylonitrile) |
-4°F to + 176°F (up to 230°F for intermittent operation) |
| Hypalon (Chlorosulphonated Polyethylene) |
-4°F to +176°F (up to 212°F for intermittent operation) |
| Viton (Copolymer of Vinylidene - Fluoride) |
20°F to + 300°F |
| EPDM (Ethylene-Propylene-Terpolymer) |
-31°F to 250°F |
| EPDM-H (Ethylene-Propylene-Terpolymer) |
-31°F to 284°F |
| SBR (Copolymer of Styrene + Butadiene) |
-4°F to 176°F |
| HNBR (Hydrogenated Nitrile) |
-4°F to + 248°F |