ASCO HT8551G404MS Inline Spool Solenoid Valve

ASCO HT8551G404MS Inline Spool Solenoid Valve is a direct‑mount, four‑way, two‑position valve in the ASCO Series 8551 family, designed for pneumatic control of compressed air or inert gas and intended to mount inline with piping. It features 1/4 inch port connections and a black anodized aluminum body with an aluminum spool, with seals in NBR and PUR for reliable operation, and exhaust ports that are pipable for easier environmental protection. The valve is rated for a working pressure range of 30 to 150 psi and supports single‑ or dual‑solenoid configurations, with a range of coil options including DIN, watertight, and explosion‑proof variants, plus a standard manual operator for manual override. The MS suffix denotes a dimensional option that adds 0.468 inches (11.9 mm) to each solenoid endcap, expanding clearance and mounting flexibility in tight installations. This inline spool valve is well suited to automating pneumatic cylinders, pilot valves, and other air or inert gas control tasks in industrial automation environments.