The LKD12215 is a type of mechanical pressure control unit manufactured by MPC Industries. It is used to control the pressure of fluids, gases, and other flowable substances in industrial applications. The LKD12215 is constructed of stainless steel and is designed to be reliable, efficient, and able to provide consistent performance over a long period of time. It is rated for 250 pounds per square inch of pressure and has a range of 0 to 250 psi. The unit comes with four separate pressure control elements, and a shut off valve. It is also equipped with a pressure gauge and adjustable high and low pressure relief valves, as well as a check valve.