HUMPHREY 320 / 420 IN LINE VALVES
Humphrey 320 / 420 in line valves are direct acting 3 & 4 way valves with a balanced spool poppet design. The 320 & 420 series in line valves are 1/4 ported 3 port and 4 port valves capable of handling pressures from 29″ hg to 125 PSI. The frictionless poppet design means that the valves do not require lubrication and are tolerant of air line contamination.