Industrial Valves & Fittings Group has introduced its OS&Y gate valve and NRS gate valve to the world market.
These valves are UL-listed and FM-approved or certified in the United States.The butterfly valves are suitable for fire protection. Unlike ordinary gate valves, the OS&Y gate valve (outside screw and yoke) is propped up by the A-frame yoke built outside the valve’s covered body. The screw nut is held firmly as the shaft goes up or down without turning. The valve’s wheel is connected directly to the nut or by means of gearing as both revolve. It pulls or pushes the disk that opens or closes the valve.
The NRS gate valve works differently. The screw nut is fitted into the valve plug or disk of the internal valve. The shaft or bar and handle turn as the valve’s interior opens or closes. The inside nut moves up or down while the thread of the internal shaft rotates within the nut. This model is more compact compared to the OS&Y gate valve.