Hydraulic pressure relief valve maintenance methods: 1, storage hydraulic pressure relief valve arrived at the site, if temporarily not installed or after the factory overhaul, maintenance, should be stored in a rain-proof facilities in the warehouse, hydraulic safety valve products in transit Do not invert. 2, maintenance a, hydraulic safety valve products, staff should check the top of the tank once a month, check valve disc, seat, stem, valve sleeve and other parts for dust, dirt, if any, should be cleaned: Every six months, to the valve sleeve, stem wipe again transformer oil. b, hydraulic relief valve shell paint inside and outside surface should be re-painted once again. c, hydraulic safety valve installation, be sure to add antifreeze hydraulic oil.