Check valve is an automatic valve, no manual operation, only rely on the pressure of the flow medium in the pipeline to push the valve plate, can achieve the opening and closing of the valve. When the check valve in the pipeline medium stop flow, check valve valve plate lost the pressure of the medium, then close, can prevent the pipeline medium backflow, to ensure the safety of the pipeline has played a great role.
Common check valve forms include butterfly check valve, silent check valve, swing check valve, etc. The check valve of different structure form, material pledges with makings, craftsmanship is different, the price also can differ.
Usually the material is related to the working condition environment, different working conditions need to cooperate with different materials to ensure the normal operation of the valve. Check valves commonly used material nodular iron, cast steel, stainless steel, etc., this is also an important factor affecting the price of valves.
