Relay Pneumatic Reversing Control Reversing Relay Control Range 18 psi Main 3 to 15 psi Pilot Pressure Range Main 18 psi / Pilot 3 to 15 psi Max Safe Air PSI 30 psi Air Connections Port 1 (Main Supply) barb for 1/4 (6-mm) OD tubing Ports 2 3 and 4 (Branch Output Pilot Input and Exhaust respectively) barb for 5/32 (4-mm) OD tubing - Voltage (AC) - - - Height (In.) - 1 1/2 Diameter Width (In.) - Depth (In.) 2 1/4 in - Application -