Norgren® by Dixon® Relieving Cylinder Gas Regulator without Gauge, Series: 1 Series R83, 1/4 in PTF, 10 scfm Flow Rate, 5 to 125 psi Pressure Norgren® by Dixon® R83-200R 1 Series Relieving Cylinder Gas Regulator without Gauge, 1/4 in PTF, 10 scfm Flow Rate, 5 to 125 psi Pressure