ARO Cat33S-000-N-G Solenoid Air Control Valve

The ARO CAT33S-000-N-G is a CAT Series solenoid air control valve engineered for compact inline installation and stackable configurations in pneumatic systems. This three‑way, two‑position valve uses a single solenoid actuator (coil not included) and is normally closed with a spring return, making it suitable for directing compressed air or inert gas to single‑acting cylinders, air motors, or air‑operated pumps. It features a 1/8 in NPT inlet port (female) and 10‑32 pilot and exhaust connections (both female), all housed in a durable aluminum body with a stainless steel spool for reliable performance. Maximum flow is 1.8 CFM with a Cv of 0.048, and the unit responds in about 9 milliseconds to coil actuation. The valve operates from 0 to 150 psi over a temperature range of 0 to 122 °F and is rated for air as the working medium; electrical connection is via a DIN solenoid interface, with the coil sold separately. Its compact footprint measures roughly 2-11/16 in in height, 7/8 in in width, and 1-5/8 in in length, enabling inline plumbing and stacking in tight spaces. Blocking the exhaust port allows the 3‑port design to be configured as a 2‑way valve, adding flexibility for high‑flow or space‑constrained applications. Arranged for use in automation, pneumatic tooling, and inert gas handling, this valve is made in the USA and is designed to integrate with standard 1/8 in NPT piping and 10‑32 pilot/exhaust fittings for straightforward installation.