The Woodward PG-PL Governor is a widely used hydro-mechanical governor for controlling speed on diesel and gas engines and steam turbines driving pumps and compressors. It features pneumatic speed setting, a self-contained oil sump, and an adjustable buffer compensation system for stability, with a comprehensive range of optional accessories for diverse applications.
Key Features
Standard Features
- Hydro-mechanical governor with centrifugal flyweight speed sensing
- Pneumatic speed setting (direct or reverse bellows)
- Manual speed adjustment knob
- Adjustable needle valve and spring-loaded buffer compensation
- Internal oil pump, relief valve, and accumulator
- Self-contained oil sump reduces contamination risk
- Power cylinder (servomotor) positions fuel racks, fuel/steam valves
Optional Features
- Oil cooler for high temperature (>99 °C) or high drive speed (>1,200 rpm) applications
- Air, oil, or water pressure shutdown devices (high or low)
- Energize or de-energize solenoid shutdown
- Booster servomotor for quick starts (conserves starting air)
- Preloaded buffer springs for gas engines and reciprocating pump drives
- Various base and power cylinder assemblies per OEM specifications
- Integral or remote-mounted power servos (3, 6, 9, or 12 o’clock positions)
Applications
- Diesel and gas engine speed control
- Steam turbine speed control
- Pump and compressor drive applications
- Industrial and utility power generation
- Marine and locomotive applications
Drake Controls Services
Drake Controls is a Woodward Authorized Distributor. We stock PG-PL governors and provide repair, overhaul, and field support. For repair or overhaul, submit a repair request or email service@drakecontrols.com.