China Explosion-proof Safety Valves is a shock wave that can eliminate water hammer can stop water hammer shock of water safety valve. It is composed by a plurality of sets of product safety valve, the function played by a single valve can not be achieved. Shanghai part of the production of FA49H-proof safety valve is usually installed in the head wave of water supply projects in the pipeline in order to block the way of wave-wave and combined to prevent water hammer shock waves along the tube into the interior of the first system of water supply projects, so as to eliminate damage of water hammer shock wave, super facilities to protect the normal operation of the system and security purposes.