The VRP-SB-PID is a three mode, proportional-integral-derivative, controller providing pressure control when utilized with a single-acting actuated control valve or in tandem with a pneumatic positioner. The VRP-SB-PID measures process sensing pressure adjusting the signal to the positioner or actuator to maintain the pressure set point. The VRP-SB-PID Controller is ideal for short pressure control applications such as power plant regulation and double-stage pressure cuts with setpoints ranging from 35 to 1300 psig.