Allen-Bradley 836-A2A Pressure Control Switch

Allen-Bradley 836-A2A is an electromechanical pressure control switch (Bulletin 836) used for automatic on/off control in pneumatic and hydraulic systems when a target pressure is reached. With Device Style A and internal copper alloy bellows, the unit uses a Type 1 enclosure suited for industrial environments and is offered with factory-set trip and reset settings for predictable operation. The standard operating range for Style A devices spans from 30 inHg vacuum to 375 psi, with an adjustable differential of 2 to 95 psi, enabling precise control over turn-on and turn-off pressures. The switch is rated for maximum line pressures up to 750 psi and can withstand occasional surge pressures up to 850 psi, accommodating demanding industrial service. As part of Allen-Bradley’s 836 Pressure Controls family, the 836-A2A provides a compact, repeatable control point that can be used to regulate compressors, air dryers, filtration systems, or other process lines that require tight pressure boundaries and repeatable cycling. The combination of copper alloy bellows and robust enclosure ensures compatibility with a range of media and environments, making it a suitable choice for general industrial control panels and interlock circuits where safety and consistency are paramount.