When the shutdown process 1. Close BQ41F) sealed insulation ball valve hand wheel clockwise, the stem and the ball began to fall away from the seat starts to rotate. 2. Continue rotating the hand wheel, stem being embedded in the spiral groove on its role of guide pins, so the stem and ball while rotating 90 °. 3. When it is almost closed, the sphere has at without contact with the valve seat is rotated 90 °. 4. Turn the hand wheel through the final two laps soft (hard) ball price sealed insulation, flat triangular wedge mechanically to the oppression of the ball at the bottom of the stem, so that pressure in the seat tightly, to be completely sealed. Cause and Remedy valve failure: failure analysis of electric valve installation for production reasons: 1. poor lubrication, a foreign body stuck in the valve, causing great damage to the torque side; 2. motor failure; the failure to eliminate: 1. to refuel, so Tubing is good, packing compression should be adapted, should be immediately removed the foreign body BQ41F ball valve supplier, kept clean; 2. Motor working time is not more than 15 minutes, the power should be normal, to avoid motor damp. BQ41F ball, Everbright valve, BQ41F Ltd provided by Shandong Everbright valve. Valve Co., Ltd. Shandong China Everbright (www.sdgdfm.com) Shandong Weifang, ball leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Everbright valve leadership with the staff warmly welcome all inquiries negotiations to create a better future for China Everbright valve.