Brochure

features
A-27
www.sbt.siemens.com/hvp/components
Description
Applications
Thermostats & Hygrostats
Pneumatic High and Low
Temperature Detection
Thermostats
134
134 Pneumatic Low Temperature
Detection Thermostat.
The 134 High and Low Temperature Detection Pneumatic
Thermostats automatically “lockout” at set point 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 set point.
On a typical low temperature application, the thermostat
stops the fan or closes a damper when the temperature
drops to the set point at any one foot (30.5 cm) or more of
the sensing element.
features
• Snap-acting pneumatic switch
• Sight-set calibrated set point scale
• No leakage of air prior to reset of switch
• Easily adjustable settings
• Normally closed air valve; bleeds to less
than 2 psig (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 psig (152 kPa) air pressure
Application Drawings