Search Catalog   By Item #By Keyword         All Categories    Manual Double Disc Valve All Categories > Double Disc Valve > Manual Double Disc Valve    Manual Double Disc Valve Click on a Product to view details. Manual Double Disc Leak Detector Valve  (6) Another disc and stem is added to control the third port. Two actuators are used to control two stems and three discs. Manual Double Disc Divert Valves  (18) The angled configuration of the disc and stem of the Minidisc valve has been carefully re-engineered into a double-disc, sharing one stem and controlling two ports.