WOODWARD TG‐13E and TG‐17E Actuators

WOODWARD TG‐13E and TG‐17E Actuators

Applications

The TG-13E and 17E actuators are self-contained electrohydraulic actuators for use on steam turbines where isochronous control, load sharing, or other functions are required. They can be used with all available Woodward electronic governor controls and accessories.

Description

The TG-13E and 17E proportional electro-hydraulic actuators convert an electrical signal to a corresponding proportional output shaft position to position the valve which controls the flow of steam or energy medium to the turbine. They are intended for controlling small steam turbines driving such loads as alternators, dc generators pumps, compressors, fans or papermaking machines. The actuators provide the "muscle" for a Woodward 2301, 2500, 501 (with a digital remote final driver), or similar integrating electronic control system.

The actuators provide a mechanical output position in proportion to a dc control signal.

Standard Features Critical moving parts are made from either heat treated or hardened steels. All O-rings and shaft seals are made of a fluorocarbon material, All moving parts are submerged in oil. The actuator has a self-contained oil sump.

Special Features

The actuators are equipped with an oil pump and must be driven either by the turbine or other means, such as an electric motor. Factory adjustments allow the actuators to be calibrated over given ranges of input signal consistent with the type of controls in which they are used.

Optional Equipment

The standard model requires a mechanical drive, however a unit is available which requires only a customer-supplied hydraulic pressure source.

Class I, Division 2, Groups B, C, and D UL Listed actuators are available. NOTE—Unless otherwise specified, TG-13E and -17E actuators are calibrated for vertical operation. When used in a horizontal application these actuators will have approximately a 5° to 6° shift in terminal shaft calibration. Breather cap location must also be changed. (See outline drawing for breather cap location.)