MAR-1 Series includes relieving designs, which maintain constant pressure output even when downstream conditions change, as well as non-relieving designs, which do not automatically compensate for changes in downstream flow or pressure. Supporting flows to 5 scfm, series does not vent to atmosphere. Output pressure can increase due to downstream event, and multiple adjustment options are available. Configurations include #10–32, M5, 1/8 in. NPT, R1/8, G1/8, and cartridge mount.