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ITEM DESCRIPTION 1 Keyed Shaft 2 Upper Stem Seal 3 Upper Body 4 Lower Stem Seal 5 Stem Bearing 6 Dog 7 Ball 8 Seat Ring 9 Lip Seal ... Installation, Operation and Maintenance Manual IOM-CAM-BALL-T31. 6 ENGINEER ED VALVES Open and Closed Viewports Maintenance Operation VALVE KEYSHAFT STOP STOP VALVE. Cameron Valves Cameron Valves Measurement.