Another CORKEN – an IDEX Energy business compressor overhaul headed back to service. This is a WFD591 2-stage, water-cooled unit used in R410a refrigerant recovery. Looking for support for your Corken or Blackmer, a PSG brand reciprocating compressor? Look no further than S&S Technical, Inc.. Our Kentucky-based service center stocks over $500K in compressor parts and with over 20 years of in house experience, you can know the work is done right.