Check Valve
Check valves prevent reverse flow via spring-loaded single or dual discs, swing discs or ball mechanisms in wafer, flanged or threaded bodies. Ductile iron, WCB, brass or SS304/316 with EPDM/NBR/PTFE or metal seats ensure silent non-slam shutoff, low cracking pressure and corrosion resistance. Sized DN15–DN1200, driven purely by flow—no actuator. Fits water, sewage, oil, HVAC and pump discharge under DIN/ANSI/JIS.
Check Valve Type Selection
Single-disc check valves use one spring-loaded disc and provide compact, low-loss protection for general water lines. Dual-disc valves use two spring-loaded half-discs, offering a short face-to-face dimension for restricted spaces. Swing check valves provide very low flow resistance and suit larger, lower-pressure systems. Ball check valves handle sludge, viscous fluids and media containing solids.
Installation Guidance
The flow arrow must follow the pipeline direction. Spring-loaded designs close quickly and help reduce reverse velocity and water hammer. Swing check valves need the correct hinge orientation, while vertical installation normally requires upward flow. Leave enough space for cover removal and maintenance. On pump discharge lines, a suitable straight run helps reduce turbulence and unstable disc movement.
Bodies are available in ductile iron, WCB, brass and SS304 or SS316, with EPDM, NBR, PTFE or metal seats. Sizes and connection types depend on the selected design.
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FAQ
1
Can a check valve be installed vertically?
Many types can be installed with upward flow, but the permitted orientation should be confirmed for the model.
2
Why does a check valve slam?
Reverse velocity and slow closing can cause slamming. A spring-loaded or damped design may be required.
3
Which type suits sludge?
Ball and suitable full-lined designs generally handle solids better than thin-plate discs.
4
What information is needed for a quotation?
Please provide size, medium, temperature, pressure, flow rate, orientation, connection and standard.
Veyron Valve (Tianjin) Co., Ltd. We offer a diverse product range, specializing in butterfly valves, gate valves, and check valves. Our butterfly valve comes in wafer, lug, and flanged types, plus we supply chain wheels, joints, stainers, and more.
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