Description
The Utica-Dunkirk 26857 is a heavy-duty pneumatic bulb thermostat engineered for precise heating and cooling control in commercial and industrial HVAC applications. Featuring a long 3/32″ x 54″ averaging bulb, this thermostat is ideal for sensing temperatures across large areas such as ducts, plenums, or hydronic systems, delivering accurate and responsive pneumatic control signals.
Key Features
- Dual-function heating and cooling operation
- 20 PSIG direct acting output for heating control
- 15 PSIG reverse acting output for cooling control
- Safe bulb temperature rating of 230°F for high-temperature environments
- 3/32″ x 54″ averaging bulb for broad-area temperature sensing
- Dial marked Cooler–Warmer for intuitive field adjustment
- Temperature setpoint range: 30–90°F
- Adjustable throttling range: 5–25°F for precise proportional control
Application
Designed for use in pneumatic control systems where reliable, proportional temperature regulation is required. The extended averaging bulb makes this thermostat well-suited for duct-mounted, averaging, or immersion sensing applications in commercial buildings, industrial facilities, and hydronic heating and cooling systems.
Specifications
- SKU: 26857
- Brand: Utica-Dunkirk
- Control Type: Pneumatic Bulb Thermostat
- Application: Heating and Cooling
- Direct Acting Pressure: 20 PSIG
- Reverse Acting Pressure: 15 PSIG
- Safe Bulb Temperature: 230°F
- Bulb Size: 3/32″ x 54″ Averaging Bulb
- Dial Markings: Cooler–Warmer
- Temperature Range: 30–90°F
- Throttling Range: Adjustable 5–25°F
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