How To Eliminate The Fault Of Safety Valve And Daily Maintenance And Inspection

             A.Safety valve is an important safety accessories of pressure type special equipment, safety valve is an automatic valve, it does not have the aid of any external force and the use of the force of the medium itself to discharge, a rated number of fluid, in order to prevent the pressure exceeds the rated safety value, when the pressure returns to normal, the valve is closed and stop the medium to continue to flow.Safety valve is an important safety accessory for special pressure equipment such as boiler, pressure vessel and pressure pipe. It is a safety device set up to prevent the excessive pressure of the equipment from causing explosion under abnormal conditions. It plays an important role in safety and economy of the equipment.2.Always keep the safety valve clean to prevent the valve spring from being filled or corroded by oily dirt, and the discharge line of the safety valve from being blocked by oil or other foreign matters;Always check if the lead seal is in good condition to prevent the weight hammer of the lever safety valve from loosening or being moved and the adjusting screw of the spring safety valve from being turned at will.2: when the safety valve is leaking, it should be updated or repaired in time.It is forbidden to increase the load (such as excessively tightening the adjusting screw of the spring safety valve or hanging heavy weights on the lever of the lever safety valve) to eliminate the leakage.In order to prevent the valve valve from being stuck to the disc and seat by oil dirt and other dirt in the gas, which may cause the valve to be unable to open normally, the safety valve used for air, steam or other gas with sticky dirt but not harmful to the discharge should be regularly carried out hand discharge test.3: to keep the safety valve sensitive and reliable, check it at least once a year.The contents of periodic check generally include dynamic check and disassembly check.The main content of dynamic inspection is to check the opening pressure of the relief valve, the return pressure, the degree of sealing and the opening height under the rated discharge pressure, and the requirements are the same as the relief valve debugging.If the dynamic inspection is not qualified, or in the operation of the collapse leakage and other abnormal conditions, the requirements are the same as the safety valve debugging.If the dynamic inspection is not qualified, or in the operation found leakage and other abnormal conditions, should be carried out disintegration inspection.After the disintegration, carefully check all parts of the relief valve for cracks, scars, wear, corrosion, deformation and other conditions, and according to the size of the defect and the degree of damage to repair or replacement, the final assembly, dynamic inspection.