Damper Actuator

Additional Details

DEC 1700 series are reversing proportional motors used to operate dampers or valves in Electric Modulating Circuits. Electric actuators are designed to meet the requirement of damper control, valve control applications where it is generally required to drive the load through less than one complete revolution either direction and to stop instantaneously at any point of the stroke. Such devices, sometimes also called as Modulating Motors are extensively used for Air-Conditioning, Boiler applications.

Actuator type DEC 1700 consists of a reversible servomotor connected to the output shaft of the device through a series of precision hobbed gears. The gear train is sealed with high grade and high temperature stable grease, thereby ensuring permanent lubrication. Cam operated limit switches stop rotation of the output shaft at predetermined CW and CCW limit of travel. The stroke angle is factory set but can also be altered in field. Thus, by supplying power at the proper terminals, the output shaft can be positioned anywhere within the set stroke angle.

The actuator type DEC 1701 is similar to DEC 1700 in all respect, but has an additional in built feedback potentiometer. Also an auxiliary cam operated micro switch can be fitted internally in both the types, as an optional feature for ON-OFF control of pumps, fans etc. With DEC 1702, the actuator can be run with the Electronic Positioner of 4-20mA input signal. DEC 1704 model is DEC 1701 type with a Position Transmitter of 4-20 mA output signal.

Features:

These are with line voltage or low voltage motors

With single turn actuators, the stroke is fixed at 900 1600, or 2700 and is also field adjustable

Models for two-position (ON-OFF) control, fitted with feed back potentiometer and proportional controller with 4-20mA

Rated for ambient -400C to +500C

Available with internal cam adjusted auxiliary switches

Electrical Specifications:

Supply Voltage: 24, 110, 230 VAC, 50/ 60Hz, 1

Power Consumption: 20 Watts

Stroke: Factory set at 900, 1600, or 2700. (Field adjustable)

Auxiliary Switch (Optional): 2.5A, 250V, 50Hz, NO or NC. (Operated at only one fixed point)

Feedback Potentiometer: 135Ω standard matched to stroke angle of either 900, 1600, or 2700. (The maximum permitted power dissipation for feedback potentiometer is 1W for 900, 1.5W for 1600, and 2W for 2700 stroke angle)

Electronic Controller: 4-20 mA Input Signal

Torque-Speed capabilities: Total gear ratio is adjusted at factory