One-Pipe Pneumatic Room Direct-Acting Thermostat (55° to 85°F)

These single-setpoint, one-pipe thermostats are designed for proportional control of pneumatic valve and damper actuators used in HVAC systems. A highly sensitive bimetal element with feedback is used for accuracy and stability. Models are available for direct or reverse acting proportional action. The throttling range is factory set and field adjustable. Setpoints are adjusted using sliders which can be locked or limited using setpoint stops (HFO-0027). The thermostats require a scale plate assembly, cover, and an external 14.4 scim restrictor in the supply line. See the Accessories section for a variety of options. Features: Sensitive bimetal element provides consistent, accurate feedback Direct or reverse acting proportional control of valve or damper actuators (see the Models section) Field-adjustable throttling range