Dungs Differential Pressure Switch for Air, Flue and Exhaust Gases AA-A2…
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Dungs Differential Pressure Switch for Air, Flue and Exhaust Gases AA-A2…

AA-A2… differential pressure switches are field adjustable, compact pressure switches for automatic burner controls.  Available with hose or NPT threaded connections.

AA-A2-4… differential pressure switches are suitable for making and/or breaking a circuit when the medium pressure changes relative to the set point.  AA-A2-4… versions feature hose connections.

AA-A2-6… differential pressure switches are suitable for making and/or breaking a circuit when the medium pressure changes relative to the set point.  AA-A2-6… versions feature NPT threaded connections that also include a test button in the lower housing.

Application:  Differential pressure monitoring in firing, ventilation and air-conditioning systems,.  The AA-A2… can be used as a pressure, vacuum or differential pressure switch for air and non-aggressive gases.  Not suitable for natural gas, propane, butane and other combustible gases.

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Additional information

Spec 1

AA-A2… SPDT differential pressure switch in pressure and vacuum ranges. The differential pressure acts via the diaphragm against the force of the setting spring on the micro-switch. The pressure switch operates without any auxiliary power.

226358_AIR_PRESSURE_SWITCH_AA_A2.pdf