Hydraulic check valve's inner workings

Hydraulic check valve internal operation form, hydraulic check valve is suitable for the medium for water pump outlet pipe of the road, to avoid and reduce the pipeline system in the medium flow back, prevent excessive water hammer, in order to protect the pipeline system, its function with a valve (valve and two The piping design of traditional gate valve and check valve or butterfly valve with regular check valve) Check valve flow refers to rely on the media itself, and automatic opening and closing valve, used to prevent the backflow medium valve, also known as the non-return valve, check valve, valve, and the back pressure valve upstream. Hydraulic check valve when system failure, line the bottom of the medium pressure drop, the valve plate closed under their own gravity, the control system of the hydraulic source electromagnetic directional valve hydraulic source commutation signal reception and help close the hydraulic cylinder in hydraulic source into the cavity, together with the spring push the hydraulic cylinder piston moves down, help to quickly close the valve disc in the valve plate is turned off from the auxiliary power unit must be locking valve plate, to prevent pipeline system steam and cooling water goddess of flow back, protect the main equipments such as steam turbines. The purpose of the hydraulic check valve, the hydraulic check valve installed on the steam from the steam turbine low pressure guide tube leads to the extraction of horizontal pipe, mainly to prevent extraction steam pipeline flow backward or accident case, steam turbine caused by speeding. The characteristics of the hydraulic check valve, valve plate with large Angle, shorten the open shutoff stroke, hydraulic help achieve rapid opening and closing, three-dimensional eccentric sealing structure, open the seal or separation, close contact with the sealing, lightweight flexible opening and closing.