Dungs AA-A2… Differential Air Pressure Switches are field adjustable, compact pressure switches for automatic burner controls. Available with hose or NPT threaded connections.
The AA-A2-4… differential pressure switches are suitable for making and/or breaking a circuit when the medium pressure changes relative to the setpoint. The AA-A2-4… versions feature hose connections.
The AA-A2-6… differential pressure switches are suitable for making and/or breaking a circuit when the medium pressure changes relative to the setpoint. The AA-A2-6… versions feature NPT threaded connections that also include a test button in the lower housing.
Differential pressure monitoring in firing, ventilation and air-conditioning systems. The AA…A2/A4 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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UL, CSA and FM
AA…A2 Series NEMA 4, Threaded Connection
266934 – Dungs AA-A2-6-3 Air Pressure Switch, 0.4-4″ W.C.
266932 – Dungs AA-A2-6-2 Air Pressure Switch, 0.16-1.2″ W.C.
266936 – Dungs AA-A2-6-5 Air Pressure Switch, 2-20″ W.C.
266938 – Dungs AA-A2-6-6 Air Pressure Switch, 12-60″ W.C.
AA…A2 Series NEMA 4, Hose Barb Connection
266910 – Dungs AA-A2-4-2 Air Pressure Switch, 0.16-1.2″ W.C.
266911 – Dungs AA-A2-4-3 Air Pressure Switch, 0.4-4″ W.C.
266912 – Dungs AA-A2-4-5 Air Pressure Switch, 2-20″ W.C.
266913 – Dungs AA-A2-4-6 Air Pressure Switch, 12-60″ W.C.