The soft-sealing gate valve should not be used on pipeline in which running pressure may be over the rated pressure.
Petrochemical equipment is often 24-hour continuous operation, when the work pressure pump should be made much lower than the rated pressure, and speed work should also be lower than the rated speed.
The system rated pressure shall be the lowest of the fitting, tube or joint.
Boiler pressure is higher than rated pressure to release energy, the valve can not be a timely pop-up, the boiler unexpected serious incidents occur.
The watch is subject to the overpressure of gas which will actually be used, i. e. 125% of the rated pressure, for 15 days.
As the pressure of pipeline system overtop the rated pressure, safety valve be opened up, then liquid begin to circulate in pump, insuring safety.
