The PU225 (SPU) Series is a pilot-operated 2/2-way normally closed solenoid valve designed for air, water, and oil control. Available with brass (PU) or stainless steel (SPU) bodies, it offers port sizes from 3/8" to 2", flow orifices of 13–50 mm, and CV values from 4.5 to 48. Operating pressure ranges from 0.05 to 1.0 MPa, with a maximum withstand pressure of 1.5 MPa and a temperature range of –10 to +80°C. Coil options include AC220V, AC110V, DC12V, and DC24V, with junction box, lead wire, or timer types. It is widely used in automation, water treatment, and general industrial fluid control systems.