The 250A series 1/4-pipe air pilot valve employs the classic Humphrey diaphragm poppet valve principle. Its unbalanced air spring return design ensures reliable shifting and airtight sealing, whether in the driven or non-driven state. The compact design allows for close-proximity installation to the working area and enables rapid cycling/quick exhaust. The robust 2-way or 3-way valves are available in normally closed or normally open configurations, featuring standard or optional brass valve body construction (for alternative media).