Spring-loaded safety valve installation instructions Fifth, the safety valve common faults and troubleshooting Safety valve selection or improper use, can cause valve failure, these failures if not ruled out will affect the valve's effectiveness and life expectancy can not even play a security role ( Note): GB142243-89 "Direct spring loaded safety valve" setting pressure deviation: 1, pressure vessel and pipeline safety valve setting pressure deviation: when the sketched pressure is less than 0.5MPa Â± 0.014MPa, when the setting pressure is greater than or Equal to 0.5MPa, Â± 3% setting pressure value. 2, steam boiler steam valve setting pressure deviation: when the sketching pressure is less than 0.MPa when Â± 0.014MPa; when the setting pressure is 0.5-2.3MPa Â± 3% setting pressure; when the setting pressure is greater than 2.3-7.0MPa Â± 1% for Â± 7.0MPa setting pressure. Six, safety valve maintenance and repair In order to ensure safety valve work * and to extend the life of the safety valve, should be used in use: 1, regular inspection of the safety valve in operation is leaking, jamming and spring corrosion is not normal Phenomenon, and pay attention to observe the adjustment nut and adjusting ring set screw locking nut is loose, if the problem is found to take timely and appropriate measures. 2, the safety valve should be removed on a regular basis to conduct a comprehensive cleaning, inspection and re-grinding, pressure before re-use. 3, the safety valve installed in the outdoors to take appropriate protective measures to prevent rain, fog, dust, rust and other dirt invades the safety valve and the exhaust pipe, when the environment is below 0 degrees Celsius, you should also take the necessary antifreeze measures To ensure the safety valve action * *.