Each PG governor contains the following elements:
1. An oil pump, storage area for pressurized oil, and a relief valve to limit maximum oil pressure.
2. A centrifugal flyweight head/pilot valve assembly to control oil flow to and from the governor power cylinder assembly.
3. A power cylinder assembly (servomotor) to reposition the engine fuel rack. This can be either a spring-loaded or differential assembly.
4. A compensating system to stabilize the governing system.
5. Speed-setting adjustments.
1. Lever or dial speed adjustment
2. Spring-driven, oil-damped ballhead which filters frequency torsional vibrations
3. Optional speed adjusting motor
4. Electric, oil, water, or pneumatic shutdown
5. Wide speed range available
6. Some configurations are available compliant with applicable CE Directives—ATEX, Pressure Equipment, and Machinery
