Norgren excelon b74g filter regulator general purpose g1 2 port norgren b74g 4gk qp3 rmn a general purpose compressed air filter regulator with a design that allows in line or modular installation with other b excelon b products the filter has high efficiency water and particle removal and there is a quick release transparent polycarbonate bowl with a guard adjustment is via a push to lock knob norgren excelon b74g 4gk qp3 rmn compressed air filter regulator g1 2 port