1,Airac type 5/2 ,5/3,3/2 way air control valve 4Aseries. 2, Normally compactly designed G1/8" to ... ". 1,Airac type 5/2 ,5/3,3/2 way air control valve 4A/3Aseries. 2, Normally compactly designed G1/8 ... way valve with one head is spring return while for valve with two heads is air controlled.4, 3/2 way valve ...