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DPE ( Double Piston Effect) Seats in Trunnion Ball Valves

DPE ( Double Piston Effect) Seats in Trunnion Ball Valves

DPE ( Double Piston Effect) Seats in Trunnion Ball Valves

(OP)

Are DPE seats best in gas application than in liquids? Where does it make sense to use besides the fact that is serves as a secondary barrier in case one seat is compromised?


Thank you,

Alex

RE: DPE ( Double Piston Effect) Seats in Trunnion Ball Valves

Wherever you must have positive shutoff. ESDs, shutoff/shutouts between units, etc.
That's all I know.

RE: DPE ( Double Piston Effect) Seats in Trunnion Ball Valves

1st q equally good
2nd q It doesn't as dpe seats lock in presure between the seats which needs a separate relief, though mainly for liquid systems where thermal expansion needs to be taken into account

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