Woodward 8402-271 3-Way Pneumatic Pilot Solenoid Valve

Product Description

The 8402-271 is a high-speed 3-way pneumatic pilot solenoid valve designed by Woodward, commonly used for Wärtsilä dual-fuel and gas engine fuel control systems. It converts 24VDC electrical control signals into pneumatic output to drive the main gas control valve, achieving fast modulation of fuel gas flow for stable combustion and engine speed regulation. It is a critical safety and control component for marine gas engines and generator sets.

Features

• Part No: 8402-271, Brand: Woodward
• Coil voltage: 24VDC, 3-way pilot pneumatic structure
• Working medium: instrument air / nitrogen
• Operating pressure: 60–150 PSIG
• Fast response time: typical less than 50ms
• Operating temperature range: -40°C ~ +85°C
• Flange / bracket mounting, compact rugged housing
• ATEX / IECEx explosion-proof compliant for hazardous zone
• Built-in coil fault detection, suitable for continuous heavy-duty operation
• Matched with Wärtsilä gas and dual-fuel engine control systems

Applications

• Wärtsilä marine dual-fuel engines and gas generator sets
• Gas turbine fuel control pneumatic pilot loops
• Offshore platform, vessel engine room fuel gas regulation system
• Emergency shutdown and fuel cut-off pilot control
• Spare replacement and overhaul for existing Woodward-Wärtsilä fuel control assemblies

FAQ

Q: Is 8402-271 a governor controller?
A: No, it is a pneumatic pilot solenoid valve, not a speed governor module.

Q: What engine platforms does it fit?
A: It is widely used for Wärtsilä gas and dual-fuel marine engines as a fuel gas pilot valve.

Q: Is this part discontinued?
A: It is a critical service spare for marine engines, original production stopped, supplied as surplus, refurbished and tested spare parts only.

Q: Can it be used with other brand gas valves?
A: It is optimized for the matched Wärtsilä fuel gas valve assembly; direct replacement on other brands is not recommended without verification.