Ammonia Compressors — Asbestos Exposure Crosswalk
What This Equipment Is
Ammonia (NH₃) compressors are the heart of large industrial refrigeration systems — the kind that keep breweries, meatpacking plants, food-processing facilities, ice plants, and cold-storage warehouses cold. In a brewery, the ammonia compressor runs continuously to chill fermentation tanks, lagering cellars, and product storage to 32–36°F.
Industrial ammonia compressors are big, heavy, hot at the discharge side, cold at the suction side, and historically wrapped in thermal insulation on both. They also use packing material around the rotating shaft to keep ammonia from leaking.
Asbestos Products Historically Used Around Ammonia Compressors
| Product Category | Where on the Compressor | Notes |
|---|---|---|
| Valve packing | Shaft stuffing boxes, expansion valves | Braided asbestos rope packing — replaced on regular maintenance cycle |
| Gaskets | Cylinder heads, discharge flanges, suction piping joints | Sheet asbestos gasket material |
| Pipe covering | Suction lines (cold), discharge lines (hot) | Magnesia or calcium silicate on the warm side; cold-side insulation for sweat-prevention |
| Block insulation | Brine chillers, accumulators, condensers | Calcium silicate or magnesia |
| Motor lagging | Drive motors and starter housings | Asbestos cloth and millboard |
| Refrigeration pipe insulation | Long brine and ammonia distribution runs | Specialized cold-line insulation systems |
Manufacturers Named in Litigation Involving These Products
- Garlock Sealing Technologies — sheet gaskets, packing
- A.W. Chesterton — braided asbestos rope packing, compression packing
- John Crane — mechanical-seal product line and packing
- Johns-Manville — pipe covering and block insulation
- Owens-Corning / Fibreboard — pipe covering, block insulation
- Armstrong World Industries — calcium silicate insulation
- Crane Co. — valves and ancillary equipment
Documented Product References
Images sourced from publicly available product-identification reference materials. Inclusion does not constitute a finding of liability against any company.
Trust Funds That May Apply
- Garlock Sealing Technologies LLC Asbestos PI Trust
- Manville Personal Injury Settlement Trust
- Owens-Corning / Fibreboard Asbestos PI Trust
- Armstrong World Industries Asbestos PI Settlement Trust
Trades Most Exposed at Ammonia Compressors
Refrigeration mechanics, pipefitters, millwrights, insulators (Heat & Frost), maintenance mechanics rebuilding compressors during scheduled outages, electricians working on motor housings.
Jobsites in the Network Documenting Ammonia Compressors
- Anheuser-Busch Brewery, St. Louis, Missouri — large-scale brewery refrigeration plant
Compiled from publicly filed asbestos litigation, OSHA / EPA / state-DNR records, and industry-publication histories. Product and company references reflect what has been alleged or documented in publicly filed litigation. This page does not constitute a finding of liability against any company. Not legal advice; consult a licensed attorney about your specific situation.