Batley Butterfly Valves - Weir Power & Industrial - #17

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Weir Power & Industrial First choice for power and industrial protection 17 Batley Valve BV 6-0810 HYPERSEAL BV22000 Normal direction of flow In the closed position without pressure there is a slight interference between the disc and the seat. The stainless steel support ring prevents any outward movement of the teflon seat, so retaining the sealing force. The seat is designed to move slightly in the direction of flow, this allows the pressure access to the back of the seat, thus making the seal progressively tighter as the pressure increases. Any slight deflection on the disc in the case of very high pressures, increases the tightness and shut off potential. Reverse direction of flow In the closed position without pressure there is a slight interference between the disc and the seat. The stainless steel support ring prevents any outward movement of the seat, so retaining the sealing force. The seat is designed to move slightly in the direction of flow, this allows the pressure access to the back of the seat, thus making the seal progressively tighter as the pressure increases. Any slight deflection of the disc in the case of very high pressures, would tend to reduce the tightness but the pressure behind the seat compensates to maintain the shut off. SEAL TEFLON SEAL TEFLON Description The double offset design and geometry of the valve and seal combine to ensure a uniform 360° seal contact in the closed position and the double eccentric action moves the disc into and out of the seat with the minimum of wear and seating torque. The valves are fully rated to ANSI class 150lb and 300lb in sizes up to 600mm with sizes above on request. Standard valves can be drilled to suit most international flange standards up to class 300lb and special valves can be manufactured with bodies drilled to suit flanges up to ANSI class 2500lb. Lugged and fully flanged designs can be offered on request. 90° on/off action allows for fast operation when necessary and the low torque characteristics are an economic advantage in power operation. When fitted with a suitable positioning actuator, the valve can perform a dual purpose of modulating control and shut off. Shut-off Pressures Up to 1400psi (100 bar) Pressure Class • ASME 150 to 900 Size Range • 150mm to 600mm (Higher on request) Temperature Range • -30¢ªC to 220¢ªC Body Type • Wafer, Lugged, Flanged & Butt Welded Materials • All castable materials, Carbon Steel, Stainless Steel, Duplex, Super Duplex, Hastalloy, Inconel, Monel, Titanium, etc. For CV values refer to page 20.