Pressure Compensated Mechanical Governor
The PGA Governor controls speed or power output of prime movers used for propulsion, power generators, and propeller pitch on marine applications, locomotives, and off-road vehicles. p A wide variety of limiters and other accessories makes the PGA governor extremely versatile. The pneumatic speed reference setting makes the governor economical to install and easy to maintain. p The self-contained hydraulic oil supply makes the governor easily maintained in almost any installation environment. h4 Pneumatic Speed Setting p Standard system uses a 690 kPa (100 psi) system. A 1379 kPa (200 psi) system is optional.
The PGA is a pressure compensated, hydraulic governor that uses an air signal to establish the engine speed setting of the governor. p An internal oil pump, relief-valve, and accumulator system controls governor operating pressure. A self-contained sump stores oil and reduces the possibility of contamination from outside sources. p Oil flow to and from the governor power cylinder assembly is controlled by a centrifugal flyweight and pilot-valve assembly. The power cylinder (servomotor) positions the fuel racks, fuel valve or steam valve of the engine or turbine. p A pneumatic signal operates a bellows (direct or reverse) to change the engine speed setting of the governor. Manual speed adjustment may be made with a knob on the governor. An adjustable compensation system provides stability.