The 250A series 1/4-pipe air pilot valve adopts the classic Humphrey diaphragm poppet valve principle. The unbalanced air spring return design ensures reliable shifting and airtight sealing, regardless of whether it is actuated or not. Its compact design allows for close installation to the working area and enables rapid cycling/quick exhaust. The robust 2-way or 3-way valve is available in normally closed or normally open configurations, featuring a standard or optional brass valve body construction (for alternative media).