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Durco / Duriron Pump Engineering Manual. Copyright 1980. Asbestos Packing & Asbestos Gaskets are used.
1976 Pump Handbook. John Crane Company Graphited Asbestos is described as the most common form of packing under normal pressures. Asbestos packing for valves and Asbestos gasket use for petroleum services, and more.
De Laval Engineering Handbook (1955). De Laval Steam Turbine Co. Asbestos packing used in  centrifugal pump stuffing boxes.
De Laval Engineering Handbook (1970). De Laval Turbine Inc. Asbestos packing used in centrifugal pump stuffing boxes.
Pumps
Centrifugal Pump Manual. Buffalo Forge Company (1959). Conventional packing described as asbestos. Asbestos packing table lists recommendations such as African blue asbestos.
Cameron Pump Operators' Data (1965)   Ingersoll-Rand Company. Centrifugal pump packing made out of asbestos for stuffing boxes.  Also asbestos gaskets mentioned.
Operation & Maintenance of Pumps (1944). Bureau of Ships Navy Manual. Asbestos packing for steam and water pumps. World War II (WWII) era. Worthington & Blake-Knowles, Warren, Davidson, De Laval, Northern Cycloid, Foster, Kinney Heliquad, Waterbury equipment.