hydraulic gate valve Working Temperature:low temperature Test pressure: 21Mpa-140Mpa flanged end API 6a gate valve:hydraulic gate valve(1) Temperature Classifications K through X (-75º F to +350º F)(2) Test pressure: 21Mpa-140Mpa(3) Used on wellhead. trees ,and manifolds(4) Valve meets requirement of API 6A(5)Material Classes AA,DD and EE ,FF for PSL 1,2 and 3(6) Size 1-13/16" to 7 1/16"