Our compressor service team just completed a full overhaul on this BLACKMER® HDL612C helium reclaim compressor for an HVAC manufacturer. The HDL612C is a water-cooled, oil-free, two-stage reciprocating compressor. Every compressor overhauled by S&S Technical, Inc. goes through a strict QA/QC process that includes a 4-hour run-in, orifice testing and leak testing. We back up our work with an industry-leading 18-month workmanship warranty.