Breakdown and elimination method (1) does not return after the discharge valve seat. This is mainly a spring bent stem, the valve installation caused by malposition or jammed. Should be re-assembled. (2) less than the required pressure is on. The main constant pressure allowed; elastic spring aging decline. Tighten the screw should be properly adjust or replace the spring. (3) valve frequency hopping or vibration. Mainly due to the spring rate is too large. Should use appropriate spring stiffness; Shandong valve adjustment ring to adjust properly, so the back seat pressure is too high. Should readjust the position of the adjustment ring; discharge piping resistance is too large Weifang valve, resulting in excessive emissions of backpressure. Discharge piping resistance should be reduced. Faults and eliminate open when the pressure is not specified. Valve Co., Ltd. Shandong Everbright tell you safety valve, the cause of this situation is the constant pressure allowed. Or should readjust the position of the hammer spring compression; valves and valve seat stick. Should regularly deflate valve for manual or drain test; leveraged safety valve is stuck or hammer lever is moved. Should readjust the position of the hammer and lever moves freely. Electricity industry standard "procedures to monitor the power industry boiler and pressure vessel" (DL612-1996) 9.1.13 check valve instrument expressly provides: "purely mechanical spring safety valve can be used to adjust the hydraulic device for verification, generally 75% ~ 80% of rated pressure. After the adjusted valve hydraulics, safety valve should be at least the minimum value from the actual seat Seat review. "safety valve, safety valve, the valve model by Shandong Everbright Everbright valve Limited. Valve Co., Ltd. Shandong China Everbright (www.sdgdfm.com) strong, credible, Shandong Weifang ball industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Everbright valve into the brilliant and you work for a better future!