Earlier, Sinopec's order was received at Shanghai WorldCom Pipe Valve Manufacturing Plant. The order includes more than twenty liquid ammonia emergency shut-off valves. After many improvements in the factory technicians, Sinopec Engineering Department staff site guidance. Finished products sent to the quality inspection department, all aspects of the data have reached the requirements of Sinopec. Also got the affirmation of Sinopec. It also laid a solid foundation for the liquid ammonia emergency shutoff valve produced by our company. Liquid ammonia emergency shut-off valve is a kind of safety protection valve, installed in the tank station.Liquid ammonia and gas pipeline, and long-distance hand pump (SB03-175 type) supporting the use of hydraulic control valve on-off, in order to A large number of pipes or tanks on the leak or even a fire, the rapid manual pump to relieve pressure, or high temperature fusible alloy melt, and the valve cylinder automatic pressure relief, the valve quickly closed and only leakage, a safety protection. The number of emergency shut-off valve using two hand pump control, one of the pumps work another pump spare to prevent the pump damage the valve does not work, each emergency shut-off valve with a (J23H-40P) needle valve control.