SMC NVFM251-N02-34B Pneumatic 5-Port 2-Position Valve

SMC NVFM251-N02-34B is a compact, mechanically actuated 4‑way, 5‑port pneumatic valve in the NVFM family that uses an internal pilot and a twist-selector, two-position actuator for straightforward manual selection. The main port is 1/4 in NPT and the pilot port is M5 x 0.8 ISO, with an aluminum body and nitrile soft goods for sealing. It handles clean air or inert gas within a 0.1–1.0 MPa operating pressure range and provides a Cv flow rate of 18 mm² (approximately 1.0), with a maximum mechanical cycling frequency of about 300 cycles per minute. Dimensions are about 161.2 mm long, 23 mm wide, and 40 mm tall, and the unit weighs roughly 348 g. The valve offers 2 positions and 4‑way flow, with an operating temperature range of -5 to 60°C; it is designed for use in systems that demand reliable, hands-on actuation of air circuits and can be configured for manifold mounting per SMC guidelines. Fluid: air or inert gas; port 1 size/type: main 1/4 NPT; pilot port: M5 x 0.8 ISO; qualifies under JIS standards as noted in SMC literature.