Milwaukee Valves and Asbestos Exposure: Manufacturer Reference

Company History

Milwaukee Valve Company is an American manufacturer of industrial valves and fluid control products that has operated for decades serving commercial, industrial, and marine markets across the United States. The company produced a broad range of valves, steam traps, and related flow-control equipment intended for use in high-temperature, high-pressure piping systems found in power plants, shipyards, refineries, chemical processing facilities, manufacturing plants, and large commercial buildings.

Throughout much of the twentieth century, Milwaukee Valve’s products were standard fixtures in American industrial infrastructure. Their valves and steam traps were specified by engineers and purchased by contractors working on some of the country’s most demanding jobsites — environments where heat resistance and pressure containment were critical engineering requirements. For decades, asbestos-containing packing, gaskets, and insulation materials were considered the industry standard for achieving those performance characteristics in valve assemblies and steam system components.

The company continued operating into the modern era under successive ownership structures, maintaining a presence in the industrial valve market. However, its products manufactured and distributed during the mid-twentieth century — approximately from the post-World War II industrial expansion through the early 1980s — are the primary focus of asbestos exposure claims and occupational health research.

Asbestos-Containing Products

According to asbestos litigation records, Milwaukee Valve Company manufactured and distributed valves and steam traps that incorporated asbestos-containing internal components during the postwar decades through approximately the early 1980s. The specific materials of concern in valve assemblies of this era typically included:

Valve Packing: Court filings document that industrial valves manufactured during this period routinely used braided or compressed asbestos fiber packing around valve stems. This packing material created a pressure seal and was considered the technical standard for steam service applications. Plaintiffs alleged that Milwaukee Valve products incorporated asbestos stem packing in valves designed for steam and high-temperature service lines.

Gaskets and Seat Materials: According to asbestos litigation records, compressed asbestos sheet gaskets and asbestos-reinforced seat materials were commonly integrated into valve body assemblies during this era. These components provided sealing between flanged connections and within valve bodies operating under thermal cycling conditions.

Steam Traps: Steam traps manufactured by Milwaukee Valve during the relevant period are documented in court filings as products of interest in occupational asbestos exposure cases. Steam traps, which function to discharge condensate from steam systems while retaining live steam, were similarly assembled with asbestos-containing internal seals, gaskets, and packing materials to withstand the demands of continuous steam service.

Insulating Compounds and Coatings: Plaintiffs alleged in various proceedings that some valve bodies and steam trap housings from this manufacturer arrived at jobsites with insulating materials or coatings that contained asbestos, and that field application of additional asbestos-containing insulation was standard practice to protect components operating at elevated temperatures.

The asbestos content of these materials was not incidental. Chrysotile and amosite asbestos fibers were prized in valve manufacturing for their thermal resistance, compressibility, and durability under repeated pressure cycles. Independent of any single manufacturer, the valve and steam trap industry broadly relied on these materials until regulatory pressure and evolving science prompted reformulation beginning in the late 1970s and early 1980s.

Occupational Exposure

Workers encountered Milwaukee Valve products — and the asbestos-containing components within them — across a wide range of American industries and jobsite types. According to asbestos litigation records, the occupational groups most frequently identified in exposure claims involving industrial valves and steam traps include:

Pipefitters and Steamfitters were among the most directly exposed. Their work required routine handling of valve assemblies, repacking valve stems with asbestos packing rope, cutting and fitting asbestos gaskets to flanged connections, and maintaining steam trap systems. Each of these tasks generated respirable asbestos dust, particularly in enclosed mechanical rooms, basements, and pipe chases where ventilation was limited.

Boilermakers and Power Plant Workers regularly worked alongside valve and steam trap systems in generating stations, industrial boiler rooms, and utility plants. Court filings document that these workers were exposed not only during initial installation but during routine maintenance cycles when valves required repacking or steam traps required overhaul.

Shipyard Workers encountered Milwaukee Valve products in the context of naval and commercial vessel construction and repair. Ship engine rooms, fire rooms, and machinery spaces contained dense networks of steam piping fitted with industrial valves and steam traps. Asbestos litigation records identify shipyard trades — including pipefitters, insulators, and machinists — as workers with significant potential exposure to asbestos-containing valve components.

Insulation Workers (Insulators) worked directly adjacent to valve and steam trap assemblies, wrapping them with asbestos-containing pipe covering and block insulation. Plaintiffs alleged that insulators also handled asbestos packing and gasket material as part of their normal scope of work, and that disturbing previously installed asbestos insulation on valve systems created significant dust exposure.

Millwrights and Industrial Mechanics in manufacturing facilities, paper mills, chemical plants, and refineries maintained process piping systems that included valves and steam traps. According to asbestos litigation records, these workers replaced packing, serviced steam traps, and removed and reinstalled valve assemblies as part of ongoing plant maintenance programs.

Plumbers in commercial and institutional construction installed heating and process piping systems that incorporated industrial valves. Plaintiffs alleged that journeymen and apprentice plumbers handled asbestos-containing valve components during rough-in work on large-scale projects including hospitals, schools, and government buildings.

The exposure risk was not confined to those who directly handled the valves. Bystander workers — electricians, carpenters, painters, and general laborers — who worked in the same spaces where asbestos-containing valve maintenance was occurring faced secondary inhalation exposure from airborne fibers released during repacking, cutting, and removal operations.

Asbestos-related diseases associated with occupational valve and steam trap exposure include mesothelioma, lung cancer, asbestosis, and pleural disease. These conditions typically have latency periods of 20 to 50 years, meaning workers exposed in the 1950s, 1960s, and 1970s may be receiving diagnoses today.

Milwaukee Valve Company is a Tier 2 manufacturer for purposes of asbestos liability tracking on this site. The company has been named as a defendant in asbestos personal injury litigation, and court filings document claims brought by workers and their families alleging occupational exposure to asbestos-containing products bearing the Milwaukee Valve name. However, Milwaukee Valve has not established a dedicated asbestos bankruptcy trust fund, meaning claims against this company are pursued through the civil court system rather than through a trust compensation program.

According to asbestos litigation records, plaintiffs in these cases have alleged that Milwaukee Valve knew or should have known about the hazards of asbestos-containing components in its products, that the company failed to provide adequate warnings to workers who handled those products, and that this failure contributed to occupational asbestos disease. These are allegations made in the context of civil litigation; no findings have been adopted here as established fact.

Because no Milwaukee Valve asbestos trust fund exists, individuals with asbestos-related diagnoses who believe they were exposed to Milwaukee Valve products pursue compensation through direct litigation. This process involves different timelines, evidentiary requirements, and outcomes compared to trust fund claims.

It is important to note that Milwaukee Valve is rarely the only defendant identified in an asbestos exposure case. Workers who handled valves and steam traps also typically encountered asbestos-containing pipe covering, boiler insulation, gasket sheet, and other products from numerous manufacturers. Many of those manufacturers have established asbestos bankruptcy trusts. An experienced asbestos attorney can evaluate the full exposure history and identify all potential sources of compensation — including trust fund claims that may be filed concurrently with or independently of litigation against non-trust defendants.

Summary for Workers and Families

If you or a family member worked as a pipefitter, steamfitter, boilermaker, insulator, plumber, shipyard worker, or industrial mechanic and handled valves or steam traps on American jobsites from the 1940s through the early 1980s, Milwaukee Valve products may be part of your documented exposure history.

Key points to understand:

  • Milwaukee Valve has been named in asbestos litigation but has not established a bankruptcy trust fund. Claims are pursued through civil litigation.
  • You may also qualify for compensation from other manufacturers’ asbestos trust funds based on additional products you worked with. Trust fund claims do not require a lawsuit and can sometimes be filed while litigation is pending.
  • Asbestos diseases have long latency periods. A diagnosis today may be legally connected to exposures that occurred 30, 40, or even 50 years ago.
  • Consulting an attorney who specializes in asbestos personal injury claims is the most reliable way to evaluate which companies and trust funds apply to your specific work history and diagnosis.

Documentation of your work history — union records, employment records, co-worker affidavits, and product identification records — is central to building a successful claim involving any Tier 2 defendant, including Milwaukee Valve.