ARO A222PS Alpha Series pilot-operated four‑way, two‑position stacking valve with five ports total (four 1/4 in NPT working ports plus a 1/4 in pilot port) and a 1/4 in pilot connection, rated to a maximum of 150 psi. The zinc body houses urethane seals and a urethane spool, delivering a Cv of 1.5 and up to 50 SCFM, and it includes two end plates, two cap screws, and one gasket. The valve is designed for air media with no lubrication required, accepts a 50 psi pilot input, and operates from 0 °F to 180 °F; it is suitable for compact automation setups where stacking multiple valves enables coordinated actuator control.
