With hot water applications in particular, material stability plays a key role. Neoperl offers check valves that are specially designed for high water temperatures.
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.
In the static state, the spring pushes the cone into its seat: the check valve is closed.
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.
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.