ARO Fluid Power A212SS120A Pneumatic Solenoid Valve

The ARO Fluid Power A212SS120A is a four‑way, two‑position solenoid valve from the Alpha family, designed to control air flow to a double‑acting cylinder with a spring return. It uses a 120 VAC solenoid and is a body‑ported Alpha valve with 1/4 in. NPT ports, rated for up to 150 psi. When energized, the internal spool shifts to route supply pressure to one actuator port while venting the opposite, and it returns to the de‑energized state via a built‑in spring. This model is commonly used in automation and manufacturing lines for precise pneumatic directional control of relatively small to mid‑sized cylinders (typically 1/8" to 3/8" porting). The A212SS‑120‑A designation indicates an SS actuator‑solenoid with return spring, part of the Alpha series widely used for compact, reliable valve control.