Humphrey Products” 320/420 Series 1/4″ ported three-way and four-way direct-acting solenoid valves have proven capable of multi-million lifecycle performance. A controlled, short-stroke, balanced poppet design permits rapid cycling and is tolerant of impurities in the air system, ensuring positive sealing. The valves have a Cv of 1.0 and are rated for air and inert gas from vacuum at 28-inches Hg to 125 PSIG. The 320 Series valves are designed for inline mounting, while the 420 Series valves can be mounted either inline or on a manifold using a subbase. Both models can be inserted into Humphrey-design custom manifolds to create compact assemblies that can fit into tight or unusual spaces. The valves feature a continuous-duty coil with a power consumption of 8.0 watts, flying leads, and a push, nonlocking manual override as standard. The valves are available in a range of AC and DC voltages. Options include DC surge suppression and AC MOV and a plug-in, DIN-type connector base.