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Model 337, 2" inlet size, Bronze Disc and Nozzle Variation, ASME Section VIII Air Service, Brass Spring Material, Set Pressure is indicated by last 4 digits of the model number
Model 337, 2" inlet size, Bronze Disc and Nozzle Variation, ASME Section VIII Air Service, Brass Spring Material, Set Pressure is indicated by last 4 digits of the model number