The Maxton UC4E1 hydraulic elevator control valve is our most common elevator control valve for the lowest flow hydraulic elevator applications. Use the Maxton valve calculator for valve sizing to the job specifications. The UC4E1 valve design also meets the demands of the hydraulic elevator industry, featuring individualized adjustments, high efficiency solenoids, an integrated relief valve and more. JACK port is located to the right - Tank port straight across to the left - PUMP port at the bottom. Solenoid- Square pattern.