Insulation is a relatively new type of ball valve type, it has its own unique structure some advantages, such as the switch without friction BQ41F, easy to wear, Shandong BQ41F insulation seal valve, opening and closing small torque. This reduces the actuator with the specifications. With multi-turn actuators can be realized on media regulation and tight cut. Widely used in petroleum, chemical, urban drainage and other demanding cutting conditions. 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 on the valve actuator models, 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; Weifang valve, BQ41F, valve manufacturers Everbright Everbright Limited provided by Shandong 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!