Blackmer oil-free gas compressors are reciprocating piston compressors, delivering high efficiency in handling propane, butane, anhydrous ammonia, carbon dioxide, natural gas, and other industrial gases. Models available with capacities from 7 to 125 CFM with working pressures up to 2931 kPa. Equipped with high efficiency valves, ductile iron pistons, self-adjusting piston rod seals and other robust features, these single or two- stage, reciprocating compressors are designed to provide maximum performance and reliability under the most severe service conditions.