Product Description
Ingersoll-Rand Company marketed through the mid-twentieth century a line of industrial Sperry vacuum pumps — a distinct product family from the Sperry-Vickers hydraulic pump line (which originated with Vickers Inc. and the Sperry Corporation hydraulic business). The Ingersoll-Rand Sperry vacuum pumps were sold into applications requiring sustained industrial vacuum service: chemical-plant reactor vacuum, refinery vacuum-distillation and vacuum-tower service, paper-mill wet-end and press-section vacuum, power-plant condenser air-removal service, and general industrial vacuum-holding applications.
These vacuum pumps were configured as rotary or reciprocating machines driven by electric motors through direct or belt drives, with rotating shafts sealed at stuffing boxes and internal chambers sealed at bolted flanges.
Plaintiffs alleged in publicly filed U.S. asbestos personal-injury and wrongful-death litigation that Ingersoll-Rand Sperry industrial vacuum pumps were furnished through the asbestos era with braided asbestos shaft packing at the stuffing boxes, compressed asbestos-sheet gaskets at the casing splits, end covers, and suction/discharge flange faces, and — where the pumps were driven by integrated electric motors — with asbestos thermal insulation in the motor windings and drive assemblies.
Workers Exposed
Industrial maintenance workers who serviced Ingersoll-Rand Sperry vacuum pumps allegedly disturbed asbestos-containing materials during routine and overhaul work. Millwrights and industrial mechanics who overhauled the pumps split the casings, scraped out old asbestos gaskets from the flange faces, and cut and fit replacement asbestos sheet gaskets. Pipefitters who broke and remade the suction and discharge piping flanges disturbed the same asbestos gaskets at the pump connections. Refinery operators, paper-mill maintenance workers, and power-plant mechanics repacked the stuffing boxes on a preventive-maintenance schedule, removing dried braided asbestos packing rings and installing new ones — a task that generated close-quarters fiber release with each cycle. Workers who serviced the integrated drive motors disturbed motor-winding insulation.