Features Long Lasting Operation --- The spring loaded check valve is made from excellent brass to ensure durability and long lasting reliable operation, making it the ideal material for this type of valve. Reverse Flow Prevention --- The check valve is designed for use in fluid systems to prevent reverse flow of liquids or pneumatic systems to prevent reverse flow of compressed air and can be used on variable frequency pumps. High Pressure --- The check valve has a robust construction and can withstand pressures of up to 16 bar, with the water pressure remaining even and constant. Ensuring Clean Water --- The non return valve prevents unwanted backflow of liquid. With just a few turns, the valve is sealed with screws and guarantees an absolutely clean water system. Spring Mechanism --- The spring mechanism of the check valve ensures that the valve opens and closes smoothly, with minimal pressure drop. This feature allows for a superior performance level, guaranteeing accurate control and maximum efficiency. Specification: Item Type: Check Valve Material: Brass Nominal Diameter: DN25 Threaded Inner Diameter: Approx. 30mm / 1.18in Threaded Outside Diameter: Approx. 32mm / 1.26in Nominal Pressure (PN): 16MPa Connection Type: Male thread, female thread Driving Method: Hydrodynamic control Type (passage position): Straight through type Type of Structure: Spring loaded lifting and resetting Package List:1 x Check Valve Package List 1 x Check Valve