Manufacturer: Nippon Ball Valve Co., Ltd.

Features

NBV metal touch ball valves have single solid bodies, making them more resistant to pipeline strain than split-structure valves. The metal contact between the ball and seat ring prevents burnout during a fire.
1. Body-Bonnet Joint
A double-seal structure with metal contact and a gasket ensures tight sealing.
2. Ball & Seat Ring (Metal Touch Seal)
Surface-hardened metal contact prevents burnout in case of fire.
3. Stem & Grand Packing (Anti-Popout Design)
If the thrust washer and packing burn down, the stem contacts the body to prevent protrusion. A packing presser minimizes fluid leakage.
4. Seat Ring Back Seal
If O-rings burn, a metal tray spring presses the seat ring to prevent excess leakage.