Features: 1. wedge seal structure. The valve stem is provided by mechanical force, the ball onto the seat and wedge pressure seal, the valve seal is not affected by changes in pipeline pressure, sealing performance under various conditions have a reliable guarantee. 2, self-cleaning sealing surface structure. When the ball away from the seat tilt two-soft (hard) ball price sealed insulation, pipeline fluid along the sealing surface of a sphere through 360 ° uniform, not only eliminates the high velocity of the seat of local erosion, but also washed away the sealing surface accumulations on, to achieve self-cleaning purposes. As a result of the steam valve insulation jacket insulation to help even if the outside temperature is below freezing, the valve is still operational flexibility BQ41F, can be closed to ensure the pipeline can start. The advantage is that other control valves are not available, a heavy oil pipeline ideal control valve. Jacket connections: 1. The optional threaded connections DN15 - DN20 G3 / 8 BQ41F) sealed insulation valve, DN25 - DN150 G1 / 2, DN200 above G3 / 4; 2. optional flange connection. 15 flange DN15-DN50, DN65 - DN150 flange 20, DN200 more than 25 flange. BQ41F) _ sealed insulation ball valve _BQ41F Everbright Everbright Limited provided by Shandong 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.