Allen-Bradley 836-A2A Pressure Control Switch

Allen-Bradley 836-A2A is an electro-mechanical pressure control switch from the 836 Bulletin family, designed for general industrial service with Style A internal copper-alloy bellows and a Type 1 enclosure. The device senses air or process pressure and actuates a control circuit when a set pressure threshold is reached, offering an adjustable operating range from 30 inHg vacuum up to 375 psi, an adjustable differential from 2 to 95 psi, and a maximum line pressure rating of 750 psi (with occasional surge pressures up to 850 psi). Factory-set trip range and differential are standard, meaning the maximum operating range and minimum differential are preset at the factory for consistent actuation across installations. The 836-A2A is compatible with other 836-series pressure controls and is built for durable service in environments where precise cut-in and cut-out pressures are essential for equipment like compressors, pumps, and other pneumatic or hydraulic systems. With internal copper-alloy bellows and a rugged Type 1 enclosure, this switch delivers repeatable performance in general industrial applications where reliable pressure monitoring and control are required.