Batley Valve® BV 30000 – Varidiff Vane

Varidiff trim incorporates two hemi-spherical control elements on opposite sides of the vane to reduce the pressure recovery particularly at low openings: a value of 0.9 is achieved compared with 0.7 for a standard vane. Further efficacy is achieved by adding an integral baffle. For higher openings the pressure drop is broken down across the vane and the baffle plate which results in a reduction in pressure recovery. The flow characteristic is equal percentage with a turn down in excess of 100:1. Due to the low dynamic torque a stable mode of operation is maintained 5 and 80 degrees opening.

Key features/benefits

• Reduces problems in potentially cavitating services
• Extensive range of body & trim options

Applications

• Back pressure control on overboard dump lines in the offshore industry
• Other applications include firewater ring system control valve, brine blowdown control, jetty loading valves, sea-water drain and re-circulation, cooling water circulation, and distulate to culvert valves
• In addition to the above liquid service applications it has also found use on steam vent headers, and gas pipelines, for low noise requirements

Processes

• Low noise (Power)
• Low noise (Industrial)
• Oil and gas production