The 3161 is a mechanical governor designed for speed control for use predominantly on diesel engines. It was originally intended specifically for Caterpillar engines but is also used on some other types of diesel engine, mainly Wartsila.
The construction of the 3161 governor was based upon a simple design which would facilitate a number of changeover options which could easily be fitted on the governor lid assembly to suit customer requirements.
The 3161 operation can be isochronous for accurate constant speed or frequency control, or droop
for load sharing.
The options are as follows:
• Shutdown option energised to run or shutdown
• Manual shutdown
• Fuel limitation: pneumatic, mechanical or electrical solenoid
• Torque limitation
• Speeder motor control
• External droop adjustment
• Pneumatic speed control
• Manual level control
• Various terminal shaft designs
Output capacity ranges from 6 to 18 ft-lb.
The 3161 is also directly interchangeable with the UG8
The PG is an isochronous pressure-compensating governor usually used in turbine applications with a wide range of servo outputs available.
The PG-PL Governor is widely used for controlling speed for all types of diesel or gas engines and steam turbines, driving pumps and compressors with a wide variety of pneumatic speed ranges available together with shutdown options.
Other options available consist of:
• Magnetic pick up facility
• Various base options
• Various driveshaft options
• Overspeed test device
• Lube oil or air shutdown facility
• Self-contained sump
The workload output of the PG-PL ranges from 12 to 58 ft-lb in the format of either linear or rotary output.
The main advantages of this governor are that it has a number of power options and can easily be adapted to fit many manufacturers’ prime movers.
The PGA is much-like the standard PG model, however with the inclusion of an air speed setting facility; it is used extensively in marine applications.
It is a pressure-compensated, hydraulic governor that uses an air signal to establish the engine speed setting of the governor.
PGAs come with a variety of optional additional features:
• Isochronous or droop control option
• Magnetic pick up facility
• Various base options
• Lube oil or air shutdown facility
• Self-contained sump
• Load share option
• Electrical shutdown with various voltage options
• Vane servo load control
• Hydraulic load control
• Variable speed setting timing
• Extendable tail rod overload
• Speed setting limiter
• Torque limitation
• Overspeed test device
Other PGs within this range include the PG-200, the PG-300, the PG-500, the PGA-EG), the PGG and the PGG-EG and the PG-PL for compressor or pump applications.
The PG (Pressure-compensating) group of governors comprises a variety of pressure-compensating hydraulic governors with linear or rotary output and a capacity range from 12 to 500 ft-lb.
PGDs (PG governors with dial speed setting) and PGLs (PG governors with lever speed setting) control the speed of diesel and dual fuel engines but are most frequently used on turbines. The PGD also facilitates the addition of speeder motors, shutdown and overspeed test device.
PGDs can be used with a variety of drive shaft options in addition to droop facility.
The UG-40 is most commonly used for speed or load control of larger dual fuel, diesel, or gas engines and steam turbines
The UG-40 has dashpot compensation; different from that of PG governors in that there is no hydraulic bias of the pilot valve. It is accomplished instead through linkage and a dashpot system arrangement. Finally, it has the same shut down and motor options as the smaller UG-8D family range of governors.
The UG group of governors consists of a line of pressure-compensated mechanical-hydraulic governors for controlling diesel, gas or dual fuel engines or steam turbines.
Their work output ranges from 5.7 to 40 ft-lb and they are isochronous or adjustable droop formatted and have adjustable compensation.
The UG-8 is the most common of the UG family; the maximum travel of the output shaft is 42° and useable work capacity is 5.7 to 15 ft-lb.
Speed Setting Options:
• Speed Setting Options Lever speed setting (UG 8L) – widely used for variable speed control, including rubber diaphragm and bellows pneumatic control.
• Dial speed setting (UG 8D) – particularly suited for constant speed applications; a common feature of the UG Dial governor is a load limit control including fuel supply limitation and engine shut down ability in a variety of voltages.
• Speed setting via speeder motor is also available with different manufacturer motors and RPM options.
