Rexarc has partnered with WEH to develop and bring to the market a Quick Disconnect for acetylene service. If you are filling cylinders, replenishing acetone or checking CGA 520 B cylinders and CGA 200 MCA cylinders at a rapid pace, The Rexarc Quick Disconnect is for you. It only takes ONE SECOND to see the difference! Rexarc completed "time and motion" studies to determine that the quick disconnect took under one second to disengage and reengage from the cylinder connection