1、Excellent Aluminum Alloy: The spring loaded check valve is made of excellent aluminum alloy, which is not easy to wear and tear, and operates reliably for a long time. 2、Wide Application: Check valves are 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. 3、Suitable For High Loads: This check valve is so robust that the checker can withstand pressures of up to 16 bar, keeping the water pressure even and constant. 4、High Security: The backflow valve prevents unwanted backflow of liquid. With just a few turns, the valve is sealed with screws, ensuring an absolutely pure water system. 5、Easy installation: This check valve is very easy to install, it is internally and externally threaded, when installing it, you only need to align the threaded port and screw it on the water pipe. 1 x Check Valve Item Type: 5 Way Check ValveMaterial: Aluminium AlloyNominal Diameter: DN32Thread Inner Diameter: Approx. 39mm / 1.5inThread Outer Diameter: Approx. 40.5mm / 1.6inNominal Pressure (PN): 16MPaConnection Form: Male Thread, Female ThreadDriving Method: Hydraulic ControlType ( Channel Position ): Straight Through TypeStructure Type: Spring Type Lift Compound