Ross 2172B8903 Solenoid Valve 110-120V AC 1-1/2 in NPT

Ross 2172B8903 is a 21 Series solenoid-pilot, 2/2 normally open valve designed for rapid, reliable pneumatic control in industrial equipment. It features 1-1/2 inch NPT ports and operates from 110–120 VAC, 50/60 Hz, making it compatible with common North American power systems. As a solenoid-pilot controlled valve, it uses an electromagnetic actuator to shift the primary poppet and route air through the valve body, delivering crisp opening and shutoff in automation circuits. The 2172B8903 model follows Ross' structured 21 Series numbering, indicating solenoid actuation, a 2/2 configuration, and a voltage code consistent with 110–120 VAC operation. This valve is intended for inline installations in manifolds and pneumatic lines where a normally open default is desirable for safety or reset behavior. Typical applications include actuating cylinders, clamps, or other pneumatic devices in manufacturing, packaging, and material handling environments, where robust NPT-threaded fittings and a dependable solenoid package help simplify integration with existing systems.