Check valve, also known as non-return valve, one-way valve, is used to allow water to flow through it in only one direction, and it works automatically without any external control. The disc swings off the seat to permit forward flow, or swing on the seat to block reverse flow. The weight of the disc and the return flow has an impact on the shut-off characteristics of the valve. It typically applies for the fire pipelines between water main and private fire service systems, or at the fire pumper connections.

An important thing to be aware of when installing a swing check valve is, that it is not completely maintenance free since the disc needs to be cleaned once in a while. Furthermore, a lever is often mounted to enable visual check. Therefore, swing check valves are often installed where personnel is present.

It is easy to get swing and spring check valves confused, but they do serve different purposes. Swing check valves are forced close by backflow and spring check valves are closed by default, requiring more pressure to open their door and allow fluid through. 

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Q1: How long can i get the goods?
A: The Production time is within 30days. The delivery time depends on the shipment and your area.

Q2: Do you offer samples?
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Q6: Can I visit your company and factory in China?
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