The Allen-Bradley 836T-T351JX26 controller is a 836T series pressure controller. Pressure controls are designed to open and close electrical circuits in response to pressure changes. Pressure is applied through a medium to the actuator, which in the case of the 836T-T351JX26 controller is a piston with seal. An increase in pressure leads to an exertion of force on the main spring on the control. When the threshold of the spring is exceeded, the motion is transferred to the contact block through levers. In the case of the 836T-T351JX26 controller, the contact block has 2 circuits and it is an SPDT type block. The transfer of motion to the contact block leads to contact displacement which is known as trip setting. The 836T-T351JX26 pressure controller is set to the default settings for the reset/trip.

A reduction in pressure causes the return of contacts to their normal state, which is known as the reset setting. The 836T-T351JX26 controller is an adjustable controller where both the reset and trip settings can be adjusted as required. The adjustable operating pressure range for the 836T-T351JX26 controller is 140 to 1000 PSI and the adjustable differential pressure range for the 836T-T351JX26 controller is 100 to 175 PSI. The operating pressure is set by turning the operating pressure range adjustment screw. The differential pressure is set by turning the differential pressure range adjustment screw. The occasional surge pressure for the pressure controller is 10,000 PSI. The 836T-T351JX26 controller is a Style T pressure control with a NEMA 1, 4, and 13 enclosure for industrial use. The operating temperature range for 836T controllers is -22 to 150 degrees Fahrenheit. Note that operation at 32 degrees Fahrenheit and below is only recommended if there are no fluids present which may freeze and solidify.