PCRP filter regulators’ 316L stainless steel housing meets the National Association of Corrosion Engineers' (NACE) MR0175 standard for corrosion resistance, including hydrogen-sulfide environments. They control pressure at flow rates from 1,920-4,115 l/min at 1-20 bar with two ranges covering 0.5-7 bar and 0.5-12 bar. Temperature range is -76-176 °F (-60-80 °C). Suitable for outdoor environments, they're rated for use in explosive atmospheres, including zones 1, 2, 21, and 22.