Zhejiang youji machinery technology co., ltd. Valve test bench Valve testing Jlt-based test bed by the activities of the top clamps and hydraulic cylinder pressure method combining performance tests of various types of valves, the valves were tested without additional external forces affect the test results, in line with national standard valve testing requirements. The aircraft structure is divided into the hydraulic system, electrical control systems, working platforms and hydraulic clamping device for moving media storage devices and liquid recycling system, etc. Table clamping device consists of hydraulic cylinder direct-drive to achieve, so that the clip claw force uniform, clamping and reliable clamping device to the mobile capabilities through the traction rod formed by a hydraulic cylinder, the achievement of the clip claw radial synchronization mobile work. Table top clamping device set up the activities of beams, the main column. From the roof beams on the hydraulic cylinder pressure is not the achievement of the variety of different valves strength test. The machine has a water, gas, oil sealing performance and strength properties of the test. The machine used to seal the valve flange face to do positioning of the radial movement by the working table clamps to control the valve flange sizes were tested, and then clamps are pressed by the axial clamping method on the back of the valve flange to achieve test all kinds of different diameter size of the valve sealing test.