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Overview

One-pipe, single setpoint, pneumatic thermostat used to provide proportional control of pneumatic valves and damper actuators in heating and air conditioning systems. Commonly used as discharge controllers for unit ventilators.

Features

  • Rod and tube insertion sensing element.
  • Wide throttling range.
  • Gage tee and tank valve facilitate checking line pressures.

Product Specifications

Application
Low Limit controller
Airflow Usage
0.011 scfm (5.2 mL/s)
Dimensions (in.)
5 7/16 in. high x 1 1/16 in. wide x 2 1/4 in. deep
Dimensions (mm)
138 mm high x 27 mm wide x 57 mm deep
Maximum Safe Operating Pressure (psi)
25 psi
Maximum Safe Operating Pressure (kPa)
170 kPa
Temperature Range (F)
40 F to 140 F
Temperature Range (C)
4 C to 60 C
Includes
Fittings for mounting on sheet metal duct. Order restrictor separately.
Mounting
Insertion with locknut on boss of insertion shank
Setpoint Temperature Range (C)
4 C to 60 C
Setpoint Temperature Range (F)
40 F to 140 F
Shipping and Storage Temperature Range (F)
150 F maximum
Shipping and Storage Temperature Range (C)
66 C maximum
Sensor Element
Invar rod and seamless brass tube, 18 3/4 in. (476 mm) long and 11/32 in. (9 mm) diameter; Remote Bulb
Throttling Range (F)
10 F to 70 F
Throttling Range (C)
6 C to 39 C
Action
Direct Acting
Air connections
Barb fittings 1/4 in. (6 mm) poly tubing
Setpoint
Single
Number of Pipes
1
Capacity
Low
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