Siemens Pneumatic High & Low Temperature Detection Thermostat
The 134 High and Low Temperature Detection Pneumatic Thermostats automatically “lockout” at setpoint and require manual reset. The 134 Pneumatic High and Low Temperature Detection Thermostats are used on pneumatic heating and cooling systems in areas protected from the weather. On a typical high limit application, the thermostat shuts down air conditioning or ventilating fans when the duct temperature becomes excessively high. A normally closed switch opens at setpoint. On a typical low temperature application, the thermostat stops the fan or closes a damper when the temperature drops to the setpoint at any one foot (30.5 cm) or more of the sensing element.
Features:
Snap-acting pneumatic switch
Sight-set calibrated setpoint scale
No leakage of air prior to reset of switch
Easily adjustable settings
Normally closed air valve; bleeds to less than 2 psi (14 kPa) when supplied through a restrictor
Barb fitting for push-on connection of 1/4" (6 mm) OD polyethylene tubing
Holds dead-ended line to approximately 22 psi (152 kPa) air pressure
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