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Seat detail - External Sleeve type trim Shutoff occurs between the outside of the flow sleeve and a prepared area on the inside of the cage retainer; the seating is kept out of high velocity flow thereby enhancing the life of the seat. |
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STANDARD TRIM MATERIALS
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Service |
Wear Components |
Non-wear Components |
| Standard, non-severe | 17-4PH Stainless Steel | 17-4PH Stainless Steel |
| Water injection | Cobalt alloy 6 | Duplex SS UNS 31803 |
| Erosive service | Tungsten Carbide, submicron grade, 6% binder | 17-4PH SS/UNS 31803 Ni alloy 718 |
| High erosive service | Tungsten Carbide, submicron, ultrafine, 5% alloyed binder | 17-4PH SS/UNS 31803/Ni alloy 718 |
