Digital guide
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Woodward 9908-210
Product Name: LQ25 Valve w/ PIV (LQ25 Liquid Fuel Metering Valve with Pressurizing Valve)
Product Overview: 9908-210 is the LQ25 valve with an integrated Pressurizing Valve (PIV), configured identically in concept to 9908-209. It is listed in Woodward’s product catalog as “LQ25 Valve w/ PIV” and is intended for gas-turbine liquid-fuel systems that must maintain metering linearity under low manifold pressure or high bypass pressure.
Detailed content
Key Technical Specifications:
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Configuration: LQ25 valve with PIV
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Maximum Fuel Inlet Pressure: 1,200 psig (8,274 kPa)
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Maximum Fuel Bypass Pressure: 100 psig (690 kPa)
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Nominal Metering ΔP: 50 psid (345 kPa)
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PIV Boost Setting: 690 kPa (100 psig) or 1,379 kPa (200 psig) above bypass pressure
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Minimum Metered Flow: 80 lb/h (36 kg/h)
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Fuel Filtration: ≤20 µm
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Water Content: ≤0.1% by volume
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Turndown Ratio: >100:1
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Drive Voltage: 18–32 VDC
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Command / Feedback: 4–20 mA
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Weight: approx. 35 kg (77 lb)
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Nominal Bore: 29.2 mm (1.15 in)
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Ingress Protection: IP66
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Operating Temperature: –28 °C to +85 °C
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Storage Temperature: –40 °C to +103 °C
Functional Features: PIV automatically compensates downstream manifold pressure to preserve metering linearity. Fully electric, compact, easy to install. Self-cleaning shear metering tolerates real-world fuel quality. Standard 4–20 mA interface compatible with mainstream control systems.
Application Scenarios: Power-generation gas turbines, mechanical drives, marine propulsion liquid-fuel control—especially suitable for applications with long low-load durations or significant downstream manifold-pressure variations.
Working Principle & Installation: Consistent with the LQ25 + PIV architecture described for 9908-209.
