Gate valves fire test environment

Gate valves fire test environment 1) Gate valve test, the test of the valve stem and channels should be in a horizontal direction. 2) If any pressure relief device test valve, pressure relief device in test leakage as external leakage happened to calculate. 3) Such as design of the pressure relief device for cavity dielectric discharge to the downstream side, then all leak as seat leakage meter Bi. 4) The gate seal, hydraulic valves and the standard manual drive should be completely surrounded in a flame of fire in 750 degrees ~ 1000% 30 min. Flame temperature should be two thermocouples measured average temperature at the same time, the average temperature of the hot JiMin square at the start of the burning within 15 min will reach 650 degrees, in the burning period, to keep the average minimum temperature of 650 degrees, the temperature is not less than 560 degrees. When making low pressure test for valve, the valve body 590 degrees thermocouple will keep at least 5 min, bonnet thermocouple will maintain 650 degrees for at least 15 min, in order to meet the requirements, the combustion period can be extended for 5 min.