Piston Check Valve
Product
Product
Piston Check Valve

Piston Check Valve
Piston Check Valve

Piston Check Valve

A type of lift check valve that uses a guided piston instead of a traditional disc to prevent backflow in pipelines. When fluid flows in the forward direction, the pressure lifts the piston to allow flow; when flow reverses, the piston quickly returns to its seat, ensuring reliable backflow prevention. Its guided motion enhances alignment and sealing performance, making it particularly suitable for high-pressure, high-temperature, or steam applications.

    Benefits

    • Reliable backflow prevention: Guided piston ensures tight shutoff under variable flow conditions


    • High pressure capability: Ideal for steam, gas, and critical service applications


    • Reduced wear: Piston design minimizes turbulence and impact


    • Stable operation: Better alignment reduces vibration and noise


    • Compact and robust: Suitable for horizontal or vertical upward installations


    • Low maintenance: Fewer components and durable structure


    Technical Data

    ParameterDetails
    FunctionPrevent backflow (piston moves vertically within a guide)
    Connection TypeFlanged (ANSI/DIN), Socket Weld, Threaded, Butt Weld
    MaterialBody: WCB, LCB, WC6, CF8, CF8MPiston: Stainless Steel, Alloy SteelSeat: Metal or Soft Seat (PTFE, RPTFE)
    Max. Nominal PressureClass 150 ~ Class 1500 / PN16 ~ PN250
    Max. Nominal SizeDN15 ~ DN600 (1/2” ~ 24”)
    Allowable Fluid Temperature-29°C to +540°C (based on materials and seat configuration)


    Sectional Drawings

    Piston Check Valve.jpg

    Applications


    • Steam and high-temperature pipelines


    • Power generation and boiler systems


    • Oil & gas and petrochemical industries


    • Process systems with fluctuating pressures


    • Industrial gas, air, or liquid systems


    • Thermal fluid and district heating networks