Batley Butterfly Valves - Weir Power & Industrial - #13

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Weir Power & Industrial First choice for power and industrial protection 13 Batley Valve BV 6-0810 STEADSEAL BV20000 Description The Batley Steadseal Valve incorporates a rubber seal clamped to the vane edge and is designed to ensure a uniform 360° seal contact in the closed position. The double eccentric action moves the vane into and out of the bodyseat with the minimum of wear and seating torque. This valve is particularly suitable where both tight shut off and control is required. For on/off service the valves can be operated manually with a worm and quadrant gearbox or remotely operated by pneumatic piston (rotary or cylinder), hydraulic or electric actuators. Body Normally manufactured in materials including cast steel, stainless steel, duplex and aluminium bronze. The valve is suitable for through-bolt mounting between flanges to BS4504, BS10, BS1560, ANSI or DIN. Vane The vane’s streamlined design improves the flow line, reduces the head loss and is manufactured in stainless steel, duplex and aluminium bronze to suit corrosive applications. Bearings PTFE -faced self lubricating Glacier DU bearings are normally fitted and adequately provide for the high loading, low friction requirements of the butterfly valve. Spindles Two stub spindles on larger sizes and through-spindles on smaller sizes are firmly secured to the vane with stainless steel pins. The spindles are sized to suit the service and pressure requirement in either stainless steel 17-4 Ph or 316. Bodyseat We provide a stainless steel seat in the body for general applications but for strictly noncorrosive services such as clean air, we coat the body bore with an anti-corrosive surface treatment. Resilient Seal A high-quality nitrile rubber sealing ring is firmly attached to the vane edge with a steel clamping ring fixed with stainless steel setscrews and tab washers which ensure that the setscrews do not work loose in service. Alternative seals in viton, butyl, neoprene and ethylene propylene can be supplied depending on service conditions with clamping rings to suit the vane material. Gland At the drive end of the valve a conventional gland arrangement with a one piece gland follower in stainless steel provides uniform support to the packing material. Moulded packing rings selected to suit the flowing media would generally be teflon based. At the blank end of the valve a non asbestos flat gasket is supported with stainless steel cover. Testing The body is hydraulically tested and the seat is tested pneumatically for tight shut-off against the specified working pressure in the normal direction of flow. When shut-off is specified in the reverse direction of flow, the valve can be tested up to approximately half of the rated maximum pressure. Materials Pressure Class • ASME 150 to 300 Size Range • 150mm to 2600mm Temperature Range • 30¢ªC to 200¢ªC Body Type • Wafer, Lugged, Flanged Materials • All castable materials, Carbon Steel, Stainless Steel, Duplex, Super Duplex, Hastalloy, Inconel, Monel, Titanium, etc. For CV values refer to page 16.