Bulletin 836 Pressure Controls are designed for general industrial use to control and detect pressure. Allen-Bradley Bulletin 836 Pressure Controls can be used in pneumatic and hydraulic systems. Pressure controls use copper alloy or stainless steel bellows. The design and high quality components provide long life operation with air, water, oil, non-corrosive liquids, vapors, gases, and some corrosive liquids or gases. Pressure controls feature snap action precision switches equipped with silver contacts. Bulletin 836 Pressure Controls: Operating Ranges from 30 in. Vacuum to 900 psi Independently Adjustable Range and Differential Copper Alloy and Stainless Steel Bellows 7/16-20 S.A.E. and 1/4 in. N.P.T. Connections Variety of Contact Blocks Available Open Type, Type 1, Type 4&13, Type 4X and Type 7&9 and 4&13 Combination Enclosures