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These low pressure continuous-duty compressors can support multiple surface-supplied divers in shallow water or a single diver at depth. Medium duty compressors provide air at 18 to 50 CFM (510-1416 L/min) and are often used for inland diving or on small boats. We use Champion, Quincy and Rotair blocks with either electric motors, or gas or diesel engines to build these compressors for working divers.