Quick Disconnect Coupling for Liquid Cooling Solutions The CGB Series is a blind connection quick disconnect coupling for liquid-cooled server trays. It carries no internal fastener: the coupling is held by the external structure it is mounted in - the chassis, tray rail or manifold bracket - so the two halves align and dock automatically as the tray slides home, and separate again when the tray is pulled out. Specified for light load loops carrying glycol and aqueous