Type Direct Wafer Check Valve head material plastic, also known as backflow valves, check valves, back-pressure valve, check valve. Such valves are in the pipeline by the force generated by the flow of the medium itself automatically turned on and off, is an automatic valve. Check for the pipeline system, its main role is to prevent the media back, to prevent the pump and its drive motor reverses, and discharge the container media. Pressure valve can also be used for more than one of the primary system pressure may rise to an auxiliary system supplies the pipeline. Check valve according to the different materials, can be applied to a variety of pipeline media. Check valve installed in the pipeline, which has become one of the fluid component of the complete pipeline, the valve opening and closing process by which it is necessary to state the impact of transient flow system; conversely, close the valve again feature fluid flow state produces hair effect. Nominal or pressure level: PN1.0-16.0MPa, ANSI CLASS 150-900, JIS10-20K nominal diameter or diameter: DN15 ~ 900, NPS 1/4 ~ 36 Connection: flange, welding, thread, bearing plug welding and other applicable temperature: -196 ℃ ~ 540 ℃ Body material: WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, CF8 (304), CF3 (304L), CF8M (316), CF3M (316L), Ti. Choice of different materials, can be separately applied to water, steam, oil, nitric acid, acetic acid, oxidizing medium, urea and other media.