Bulletin 836 Pressure Switches

Allen-Bradley Bulletin 836 Pressure Switches are electromechanical pressure control switches designed for industrial applications requiring reliable pressure sensing and circuit switching. The family spans two primary style variants: Style A, which uses an internal bellows constructed from copper alloy, and Style C, which uses an external bellows available in copper alloy or Type 316 stainless steel — making Style C well-suited for more demanding or corrosive media. The catalog number encodes key configuration details: the style letter (A or C) follows the 836 prefix, a numeric pressure code identifies the adjustable operating and differential range, and an enclosure-type letter designates the housing — A for Type 1, E for the combined Type 7&9/4&13 aluminum enclosure, J for Type 4&13 metallic aluminum, or S for Type 4X non-metallic. An optional modification suffix and factory-preset option (suffix C) round out the part number. Notable in-stock examples include the 836-C64A (Style C, 6–250 PSI, Type 1 enclosure) and 836-C10E (Style C, 50–500 PSI, Type 7&9/4&13 enclosure). The family also includes accessories such as replacement enclosures, snubbers, and seal kits under the 836T prefix. Consult the Bulletin 836 Pressure Controls Technical Data (836-TD001) for full pressure range tables and modification codes.