Norgren® by Dixon® Excelon® R73G-2R 1 Series Relieving Compact Regulator Without Gauge, 1/4 in PTF, 91 scfm Flow Rate, 5 to 150 psi Pressure. Norgren® by Dixon® R73G-2R Excelon® 1 Series Relieving Compact Regulator Without Gauge, 1/4 in PTF, 91 scfm, 5 to 150 psi Pressure