Cast steel check valve connected by valve cover bolts

Overview and Application

Cast steel check valve connected by valve cover boltsThe function of the valve is to control the one-way flow of the medium in the pipeline, used to prevent the backflow of the medium in the pipeline. Check valves belong to the category of automatic valves, and their opening and closing components are automatically opened or closed by the force of the flowing medium. Check valves are only used on pipelines with unidirectional flow of media to prevent backflow and prevent accidents. Mainly used in pipelines for petroleum, chemical, pharmaceutical, fertilizer, electricity, and other industries.

Cast steel check valve connected by valve cover bolts

feature

Valve seat: using sealing surface welding method, easy to replace, can reduce external pressureValve seat deformation caused by force. The surface material of the valve seat is Stellite alloy, which is used in conjunction with the valveBody stability welding. The hard treated valve seat surface ensures good valve performanceThe wear resistance and corrosion resistance of the valve extend its service life

Valve body: It is spherical in shape (with a large radius), so the pressure can be reduced and the impact of water hammer can be minimized by reducing the opening angle of the valve disc

Stop bolt: using double headed bolts to reinforce the valve seat connected to the pressure seat

Graphite sealing ring: in low and high pressure, even in instantaneous high pressure and high temperatureCan still maintain good sealing effect under working conditions

Process hole: Insert the demolding pin to easily remove the retaining ring from the ring groove. Valve disc nut assembly: Use positioning screws to ensure that there is a gap between the hinge and the valve disc nutA sturdy connection; In the absence of medium flow, the valve disc can be tightened by itselfAnd close it

Sealing ring retaining ring: Adopting a 4-piece split structure, it can maintain internal pressure and is convenientDismantling

Swing check valve is used to automatically open when flowing downstream and automatically close when flowing upstream

Swing check valves can be installed on both horizontal and vertical pipelines (in which case the flow direction of the medium must be from bottom to top)

To avoid surge phenomenon, the valve disc opening angle of the swing check valve remains above 10 degrees at the minimum flow rate

Swing check valves have the advantages of light weight, simple maintenance, and relatively low cost