Linear Actuator
Adjustable 1" - 6" travel electric actuator - 100 or 200 lbs output thrust
- Designed for modulation service
- Two infinitely adjustable auxiliary limit switches
- Isolated position feedback available with R-AL & R-ALP Models
- Integral 4-20 mAdc positioner circuit board available with R-ALP Models
Overview
The “Power Arm” actuators provide a positive linear thrust for positioning dampers, louvers, jackshaft mechanisms, rotary valves, or other mechanisms. The R-AL and R-ALP are used for closed loop positioning control in a combustion control system application while the PL is used for 3-wire floating control in boiler draft control cases. Though these actuators are generally used in positioning applications, they are equally suited for on/off control.
Operation
- In response to a SPDT control switch with a neutral position, (or analog input signal on R-ALP Models) a reversible gear motor (A) rotates an Acme threaded lead screw (B) to drive a traveling nut (C) and extend or retract the actuator ram (D).
- Sealed, snap-action switches (E) are opened by ram mounted cams (I & J) to stop the motor and positively limit ram travel.
- The standard actuator includes two normally open auxiliary switches (F) that trip immediately prior to the full open or closed ram position.
- A potentiometer (not shown) provides a ram position feedback signal in the R-AL and R-ALP Models.
Specifications
Power: Ambient Temp.: Input: Load: Stroke: Speed: Auxiliary Switches: Position Feedback: Manual Operation: Linkage: Motor: Dimensions: Enclosure: Installation: |
120 Vac, 50/60Hz, 60VA 150° F (65° C) Maximum Switching SPDT or floating contacts (Models PL & R-AL), or 4-20 mAdc, 0-5Vdc, 0-1000 ohms or 0-135 ohms (Model R-ALP). 100 lbs. or 200 lbs. thrust 1" - 6" adjustable 6" in 30 or 60 seconds Two integral, enclosed, 15A, 1/8 HP @ 120 Vac (switches available on PL & R-AL) Precision potentiometer, 1000 ohm on Models R-AL & R-ALP (consult factory for other output values) Handwheel (optional on PL & R-AL) Ram eye, catalog number 20040 included; connecting linkage optional Sealed, permanently lubricated, continuous duty, capacitor start and run, 3 wire reversible 6 " H x 11 " L x 8 ¾" D 14 gauge stainless steel, fully gasketed Stationary or pivot mounting |
Ordering Information
Specify the following catalog numbers
Basic model with switched inputs
- PL-2-B3 - 200 lbs., 60 second travel speed, 120 Vac swithcing input actuator, two auxiliary limit switches and ram eye, swivel and stabilizing brackets (-W to include Hand Wheel)
- PL-2-3-B3 - 100 lbs., 30 second travel speed, 120 Vac switching input actuator, two auxiliary limit switches and ram eye, swivel and stabilizing brackets (-W to include Hand Wheel)
Model with switched input and position feedback
To order the positioner model with analog or potentiometer input and position feedback, specify the catalog number as follows:
