The DUNGS GAO (Automatic Reset), GMH (High Manual Reset), and GML (Low Manual
Reset) A4 pressure switches are adjustable pressure switches for automatic gas burning
equipment controls. A4 pressure switches are suitable for making and/or breaking a circuit
relative to changes in medium pressure relative to the set point. The set point can be set in
the field by an adjustable dial with an integrated scale. Test nipple integrated in metal housing
to verify setpoint.
The DUNGS GAO, GMH, and GML A4 pressure switches are recommended for industrial
and commercial heating applications with 1/4" NPT pipe connections. The GAO, GMH, and
GML A4 pressure switch is suitable for natural gas, propane, butane, air and other inert
Pipe mount; Calibrated for vertical mounting, set point may change by 0.2" W.C. when mounted otherwise; Screw terminals with 12" NPT Conduit
connection; Neon light included.