The 836-C11JX331 controller is a Style C pressure control. It belongs to the Bulletin 836 series from Allen-Bradley. Pressure controls are used for the activation and deactivation of industrial electrical circuits in response to changes in pressure. A connection is made from the system pressure to the pressure connection on the 836-C11JX331 controller. In this way, the system pressure is applied to the bellows on the pressure control. Rising pressure causes an increase of force on the main spring. When the threshold force level is crossed, the contacts are actuated. A reduction in the system pressure causes the mainspring to retract, which leads to the activation of the secondary differential blade spring, leading to the return of the contacts to their normal state. The operating range adjustment screw can be varied to change the trip setting.

The recommended temperature range for the storage of the 836-C11JX331 controller is from -30 to 93 degrees Celsius. The recommended temperature range for the operation of the 836-C11JX331 controller is from -30 to 66 degrees Celsius. Temperature ranges below 0 degrees Celsius are allowed for operation, provided that all substances which could freeze and impede the operation of the 836-C11JX331 controller are absent. The pressure control settings are set to the minimum differential and maximum operation settings by default. The pressure rating of the 836-C11JX331 controller is 650 PSI. The controller has external copper alloy bellows. The maximum line pressure rating for the 836-C11JX331 controller is 1300 PSI.  The approximate mid-range values for the adjustable differential is 16 PSI. The enclosure of the controller is a Type 4 and 13 enclosure. The enclosure is constructed from aluminum. The available factory modifications include the X331 and the single pole, single throw, normally closed contact which opens when the pressure rises.