A.W. Chesterton Company, headquartered in Woburn (later Groveland), Massachusetts, is a major manufacturer of industrial packing, mechanical seals, and fluid sealing products. Throughout the mid-twentieth century, A.W. Chesterton manufactured and sold asbestos-containing braided packing — the compressed asbestos material used in valve stems, pump shafts, and mechanical sealing applications throughout Navy ships. Chesterton asbestos packing was a standard product in the Navy supply chain: it was specified under Navy military specifications, delivered to Navy shipyards and repair facilities, and installed and replaced throughout naval vessels by Machinist’s Mates, Boiler Technicians, and shipyard workers who performed valve and pump maintenance. Publicly filed asbestos litigation records document A.W. Chesterton as a named defendant in multiple independent naval asbestos proceedings, with formal testimony about Chesterton packing used on Navy ships, Navy military specification documentation requiring asbestos packing, and compressed asbestos navy-grade product identification.

Documented Asbestos — A.W. Chesterton in Naval Litigation

How Chesterton Packing Exposed Navy Personnel

Valve repacking: Every valve aboard a Navy ship — steam valves, seawater valves, fuel valves, bleed valves — required asbestos packing in its stem packing gland. Repacking a valve involved removing old, hardened asbestos packing from the gland cavity and driving in fresh braided asbestos packing — a task that released asbestos fibers directly from the packing material.

Pump shaft maintenance: Centrifugal and reciprocating pumps used asbestos packing around their rotating shafts. Pump packing was replaced during preventive maintenance, repaired when leaking, or replaced completely during overhaul — each operation releasing asbestos fiber.

Pipe flange and mechanical seal work: Compressed asbestos sheet packing was used for custom-cut gaskets and flat-face sealing applications throughout ship piping systems. Cutting and trimming compressed asbestos sheet released fiber from the cut face.

Bystander exposure: Engineering spaces aboard Navy ships were confined environments where asbestos packing operations exposed workers who were not directly performing the repacking — including watch-standers and trainees who were present during maintenance.

VA Claims and Legal Options — A.W. Chesterton

Navy veterans who performed valve, pump, or packing maintenance aboard ships where A.W. Chesterton asbestos packing was installed, and who subsequently developed mesothelioma, asbestos-related lung cancer, asbestosis, or pleural disease, may qualify for:

  • VA service connection under VA asbestos-claim guidance for veterans with documented duty aboard ships where valve and pump packing maintenance was performed
  • Civil claims against A.W. Chesterton Company based on documented sale of asbestos-containing packing to the Navy, Navy specification documentation, and failure to warn

Key documents:

  • DD-214 or service records — documenting service aboard ships requiring routine valve and pump packing maintenance
  • Rating records — Machinist’s Mate, Boiler Technician, or other engineering ratings that performed valve repacking
  • Diagnosis — mesothelioma, asbestos-related lung cancer, asbestosis, or pleural disease

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Exposure documentation derived from publicly filed asbestos litigation records including multiple independent proceedings naming A.W. Chesterton as a defendant, Navy military specification documentation requiring asbestos packing, testimony about Chesterton packing used on Navy ships under MILSPEC requirements, compressed asbestos navy-grade product identification, and formal case documentation in Chesterton naval asbestos proceedings. This does not constitute legal or medical advice.