Failure: the sealing surface leakage analysis for production reasons 1. Valve mounting direction and medium flow does not conform; 2. the valve is closed is not in place; 3. long-closed valve sealing surface fouling; 4. sealing surface slight rubbing injury; 5. Seal face serious damage; failure to eliminate 1. Note check valve is installed; 2. readjust speed screw actuators on BQ41F) sealed insulation valve, shutting the place; 3. the valve open a crack, so that the high-speed liquid flush fouling; 4. High-speed shims to compensate; 5. Re-grinding, high speed pads compensation; Valve Failure Cause and Remedy: electric valve installation failure analysis for production reasons: 1. poor lubrication, a foreign body stuck in the valve, causing the torque side large damage; 2. motor failure; the failure to eliminate: 1. Come on BQ41F ball supplier, make good Weifang tubing valve manufacturer, packing compression should be adapted, should be immediately removed the foreign body inside the valve to keep clean; 2. Motor working time is not more than 15 minutes, the power should be normal, to avoid motor damp. BQ41F ball, BQ41F, China Everbright Ltd. valve model 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!