The 836-AL32-NKCH7 Low-Pressure Refrigeration Controller is a pressure controller that has been included in the 836 series by Allen-Bradley. This series includes sensing control devices and this specific controller model comes in the Style L product line. This device works as a pressure control device and it includes an additional pulsation feature that is used to filter out the pulsations that are generated by the main device connected to it, which is generally a reciprocating refrigeration compressor. It is necessary to include a snubber function so that the bellows life can be preserved and extended to be as long as possible. The Allen-Bradley 836-AL32-NKCH7 Low-Pressure Refrigeration Controller comes with copper alloy bellows that can be used with non-corrosive refrigerants only. The device also includes capillary and tubing connections and it comes in a Type 1 enclosure.

The Type 1 enclosure enables the Allen-Bradley 836-AL32-NKCH7 Low-Pressure Refrigeration Controller to operate in a controlled environment without any corrosive materials that can cause long-term damages to the structure of the device. It is also recommended to use this controller only in a clean environment without excessive amounts of dust and moisture. This enclosure will help to preserve the connections of the device and prevent the users from accidentally touching the internal components. The Allen-Bradley 836-AL32-NKCH7 Low-Pressure Refrigeration Controller operates with an adjustable operating pressure range of 20 inches in a vacuum to 120 PSI. It also comes with an adjustable differential pressure range of 9 to 50 PSI and a maximum line pressure rating of 220 PSI. The enclosure of this device can be upgraded by modifying the factory options that come by default with this type of refrigeration control device. For example, modifications in the capillary tubing can be made for different applications.