Digital guide
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Woodward 8915-628
- Product Type: 3151A Water Valve (valve only / valve assembly depending on configuration)
- Core Function: Metered bypass flow for high-pressure centrifugal-type pumps, providing pump-stability and heat-balance considerations
- Medium: Water
- Flow Rate: Minimum 3.8 L/min (1 US gal/min); Maximum 250 L/min (66 US gal/min)
Detailed content
- Supply Pressure: 2413 to 10 342 kPa (350 to 1500 psig)
- Maximum Bypass Pressure: 345 kPa (50 psig)
- Flow Accuracy: 5.0% of point or 0.5% of maximum flow, whichever is greater
- Water Filtration Requirement: 10 μm nominal, 20 μm absolute
- Temperature Range: 0 °C (32 °F) minimum to 66 °C (150 °F) maximum (standard seal material)
- Material Composition: Valve body primarily constructed of stainless steel; replaceable hardened stainless-steel sleeve in the drain flange area protects against cavitation; ceramic used on metering valve and regulator valve parts to prevent galling and resist erosion
- Structural Features: Variable-area-metering valve with contoured ports at one end of the metering sleeve; single-stage throttling delta-P regulator piston; sleeve can be rotated in quarter-turn increments or replaced to extend valve life
- Working Principle: The actuator positions the metering-valve plunger to open or close the contoured ports; the single-stage regulator piston senses and controls the pressure drop across the metering ports so flow remains unaffected by variations in valve inlet or discharge pressures
- Applications: Gas turbine water/steam injection for NOx reduction; compatible with Woodward EM Digital Driver or 24 V DVP
- Installation Requirements: Must be installed in accordance with Woodward outline drawings and the 3151A installation & operation manual; proper alignment with high-pressure centrifugal pump required
- Usage Notes: Do not use outside specified mechanical, electrical, or operating limits; observe all electrostatic discharge precautions when handling associated electronic controls; unauthorized modifications constitute misuse and void warranty
