Philic JIS Check Valve Overview Philic JIS check valve with built-in rocker arm swing structure. All opening and closing parts of the valve are installed in the valve body and do not penetrate the valve body. In addition to the middle flange used in the sealing gasket and sealing ring, there is no external leakage on the whole, to eliminate the possibility of valve leakage. Suitable for cleaning medium, not for medium containing solid particles and high viscosity. You can read our designing data below, once you have any questions, please drop us a message, we would response in 24 HOURS.