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 nonaggressive gases. Not suitable for natural gas, propane, butane and other combustible gases.
Ask us for engineering or product support.
UL, CSA and FM
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.
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.