Servo Actuator

90° rotary electric actuator (adjustable over 270°)
15 or 37 ft-lb. torque output
Designed for modulation service
Self-locking drive system to hold in last position
Electrically isolated feedback potentiometer provides indication of shaft position

Overview

The Model SM Servo Actuator provides directly connected and precise modulating control of fuel valves and combustion air & flue gas control dampers:

The actuator opens, modulates, and closes the valves and/or dampers in accordance with the integrated combustion control and burner management system programs
An integral interlock switch provides proof of open or closed position for safe burner operation
A feedback potentiometer provides indication of the motor’s shaft position
The SM Actuator is used on boiler control applications that have a maximum of 37 ft-lbs torque
For heavy-duty service consult the factory

The Model SM Actuator utilizes an instantly reversible motor to rotate a hardened steel output shaft with 0.1° precision
The output shaft actuates two adjustable cam operated travel limit switches to stop motor operation at pre-selected positions
Optional auxiliary limit switches provide positive position status to be used with BMS interlocks and/or for open close indication

Power:

Ambient Temperature:

Input:

Torque:

Duty cycle:

Rotation:

Feedback Potentiometer:

Auxiliary Limit Switches:

Repeatability:

Integral Brake:

Installation Position:

Output Shaft:

Motor:

Enclosure:

24 Vac - 50 / 60 Hz

5° F to 104° F (-15° C to + 40° C)

Switching SPDT or floating contacts

15 or 37 ft-lbs (depending on model selected)

100%

90° in 30 seconds, maximum rotation 270 degrees

5000 ohm change for 340° stroke

SPDT, 6.5A @ 130 Vac

0.1°

Fail-safe, self locking

Any

12 mm Hardened Steel

Reversible, split phase, capacitor type

NEMA 4

Specify the following:
Specify Servo Motor Actuator from table below

Ordering Table