Faults and eliminate open when the pressure is not specified. Valve Co., Ltd. Shandong Everbright tell you A28H spring 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. Spring safety valve safety valve spring vibration generated strong reasons during normal pump stop, a short vibration reason: the pump shutdown process, the pressure inside the pipe chronic motor oil to produce oil hammer. Vibration intensity that is the strength of the shock wave spring safety valve, the vibration frequency is the frequency of the shock wave. The vibration amplitude attenuation properties, the vibration the whole process until the oil shock hammer spring safety valve opening force is less than the preset force. _A28H Safety valve safety valve _ Everbright valve (Certified Merchant) Ltd provided by Shandong Everbright valve. 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!