Gear Operated Butterfly Valves are available with Nitrile Rubber Seat. C & R [Sales & Services] Pvt. Ltd. Manufactures Gear Operated Butterfly Valves. C & R [Sales & Services] Pvt. Ltd. Also manufactures different types of Valves. Gear Operated Butterfly Valves come with 6mm Bottom Shaft. The Set Screw range is 11mm. The O Rings are also made of Nitrile Rubber material. These Valves are available in 400-600mm.