Metal Seated Piston Lift Check Valve Cast Steel Stellite Double
Flanged Non Return Valve
Piston Lift Check Valve
A piston check valves are similar to lift check valves. the only
difference is that piston check valves has a dashpot consisting of
piston and cylinder that provides cushioning effect during
The dashpot produces a damping effect during operation, thereby
eliminating the damage caused by the frequent operation of the
The flow of fluid through piston check valve is similar as lift
The construction of seat and disc for the piston check valve also
same with the construction of lift check valve where the
arrangement of seating is similar to a globe valve.
Piston check valves do not require an operation. The closing of the
disc depends on the back flow and gravity whereas; the opening of
the disc depends on the upward flow.
Piston check valve can be found in 1” to 12” size range with 150#
to 900# class range.
Flow to piston check valves must always enter below the seat.
As the flow enters, the disc is raised within guides from the seat
by the pressure of the upward flow.
When the flow stops or reverses, the disc is forced onto the seat
of the valve by both the backflow and gravity.
Piston check valves are used primarily in conjunction with globe
and angle valves in piping systems experiencing very frequent
changes in flow direction.
Piston Check Valves are particularly suitable for high-pressure
service where velocity of flow is high.
Cass 900~2500 Pressure Seal Piston Check Valve
Standard Material Specifications
CS to ASTM
AS to ASTM
SS to ASTM
Note: Other materials are available upon request.
Dimensions (mm) and Weights (Kg)