A check valve is a safety valve which permits water to merely flow in one direction and prevents unwanted backflow of water in the opposite direction.
Check valves for faucets and installation systems
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NEOPERL check valves protect drinking water pipes from the unwanted backflow of used water. A precise closing mechanism prevents contaminated water from flowing back into the pipework.

NEOPERL offers a wide variety of plug-in backflow preventers.
For general applications

Neoperl offers you a wide variety of insert check valves. Our unique portfolio covers a broad range of applications.

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Check valves solutions PR model
For thermostatic and electronic faucets

Neoperl offers special check valves for use in electronic and thermostatic faucets.

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WV check valve for water meters
For water meters

Our check valves for water meters ensure that the device measurements are correct and reliable.

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Check Valve HT (high temperature)
For hot water applications

With hot water applications in particular, material stability plays a key role. Neoperl offers check valves that are specially designed for high water temperatures.

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Injector AD

The Injector AD is used to protect water supply systems. In contrast to other EN 1717 cat. 5 protection methods, it does not require electricity, pump or a water tank.

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How does a check valve work?
Check valves working Principles: In static conditions
Static state: no flow

In the static state, the spring pushes the cone into its seat: the check valve is closed.

Check valves working Principles: In dynamic conditions
Dynamic state: flow

In the dynamic state, the water pressure is stronger than the spring. The cone is pushed out of its seat and allows the water through.

Check valves working Principles: In backflow conditions
Backflow: flow in reverse direction

If the downstream pressure increases (backflow) or the upstream pressure decreases (back siphonage), the flow is reversed. The spring quickly extends in the check valve cone and closes the upstream side.

We can produce solutions tailored to the housing geometry or flow rate. Ask us with pleasure!
Do you need support?

We would be pleased to help you select the right check valve and, if required, develop customized solutions for you.

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