|Victor offers two series of 50 PSIG preset regulators. The SR-200 Series regulators are heavy duty and designed to handle high flow rates up to 325 LPM for oxygen and 100 LPM nitrous oxide. Regulators incorporate 2" high visibility gauges. The VMP-Series heavy duty regulators are lightweight and designed to hug the cylinder which reduce chances of bumping. These regulators use high visibility 1-1/2" gauges and have same flow characteristics as SR-200 Series.