The 302 Series single stage regulator is intended for primary pressure control of non-corrosive, high purity, or liquefied gases. Due to the pressure rise associated with high pressure cylinder depletion, CONCOA recommends single stage regulators for primary pressure control of cylinders filled under 500 PSIG (34 BAR) and in applications where minor fluctuations in outlet pressure due to diminishing inlet supply can be tolerated or where inlet pressure is constant.