Fluid control valve is an important safety element engineering

Nuclear energy is energy efficient in the world energy mix has occupied the position can not be ignored , so the safety of nuclear power plants has also been referred to the new height . Nuclear power plants are large and complex hydraulic system hydraulic control system , the system is strictly prohibited countercurrent many  Stainless steel needle valve  , or it may lead to serious accidents, therefore , require a lot of system -return element . Fluid control valve is an important safety component engineering , it is through closing fluid countercurrent to ensure directional flow of fluid , which protects other fluid machinery and pipeline safety . Therefore, in the nuclear power plant hydraulic system has been widely  Instrument needle valves  of non-return valve , such as swing check valves . Swing check valve has a disc-type plug hinged on the edge , through the back off. Because of its simple design , low price, good economy , high reliability, easy maintenance and daily wide range of sizes , etc., the valve in the nuclear Valve manifold  are widely used , the impact of the piston slam shut valve overpressure has been generated as experimental measurements and models to study the subject . Thus, the conventional movement of the check valve member (i.e., the valve head or valve ) to do the speed often rapidly opening and closing movement , the valve itself which is necessary features .