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1. Wherever face to face distance between flanges is limited, Central-lined Wafer Butterfly Valve is the most agreeable valve to be installed. This series of valve includes Wafer Butterfly Valve and Lug Butterfly Valve. Thank to its unique structure, it presents small weight, flow resistance and operating torque. From full open state to full close state, Valve disc only needs to turn 90 so operating time is short. With its 0-leakage Bi-Directional sealing performance, it can be easily installed and uninstalled from almost any position of pipes or containers. 2. USAGE It is widely used in vessels and containers holding corrosive non-corrosive liquid, semi-fluid, gas, powder, etc., in a variety of industries such as petroleum, chemical, metallurgy, power plant, food, medicine, textile, water Supplying/draining, paper making, ship building, environmental protection, etc. 3. Material List Body: 65 - 45 - 12, WCB, GG25, 316 Shaft: 420, 316, 1Cr18Ni9Ti Disc: 65 - 45 - 12, WCB, 316, Aluminum bronze Seat: EPDM, NBR, Viton Main Performances Nominal Pressure(lb): 50, 150 Nominal Diameter: 2 24 Joint type: Wafer Testing API: 598 Suitable Media: Water, oil, gas, corrosive material EPDM/NBR seat: -84.2 176 (º F) or - 64 5 80 Viton seat: -84.2 428 (º F) or - 64 5 220 Dviving type: Handle, worm gear, electrical, pneumatic, hydraulic
DEMCO type Butterfly Valve(Interchangeable with Demco Model DM Butterfly Valve)