... CF8M, CF3, CF3M, WC6, WC9, etc Construction Style: Trunnion Ball, Floating Ball Operated way: Manual, Worm Gear, Pneumatic, Electric, Hydraulic Operation ... , fire-safe, and lock system to prevent wrong operation. 8. Ball may be floating type and trunnion type in accordance with ... open and closing torque. The seat of trunnion mounted ball valve is floating type which realize sealing by piston effection ...