Manufacturer: Fulton Sylphon Company (later Robertshaw-Fulton) Headquarters: Knoxville, Tennessee Founded: 1904 Documented Asbestos Use: Mid-twentieth century (allegations in litigation records) Product Categories: Packless bellows-sealed valves; temperature and water regulating valves; pressure and temperature controls Legal Status: Tier 2 — Active and historical litigation; no bankruptcy trust established

Company History

Fulton Sylphon Company was founded in 1904 in Knoxville, Tennessee, by inventor Weston M. Fulton, who developed the first seamless metal bellows — a flexible, sealed metal element that could confine gases and vapors and respond to changes in temperature and pressure. During the 1920s the company applied this bellows technology to self-actuated temperature regulators and control valves, and its products became widely used for temperature, pressure, and flow control in industrial, commercial, and marine systems. In 1945 Fulton Sylphon merged with the Robertshaw Thermostat interests, and the combined operations were consolidated as Robertshaw-Fulton Controls Company in 1947.

A defining feature of the company’s valve line was the packless, bellows-sealed design. Rather than sealing the valve stem with conventional gland packing, a metal bellows isolated the stem from the process fluid, which made these valves attractive for service where leakage around the stem had to be minimized. Fulton Sylphon regulating and control valves were used in steam, water, and process systems across a broad range of facilities.

According to U.S. Navy machinery and equipment records, Fulton Sylphon valves and controls were documented as installed original equipment (OEM) aboard U.S. Navy vessels, including aircraft carriers such as USS Nimitz (CVN-68) and USS Forrestal (CVA-59). In shipboard service, regulating and control valves were installed in engineering and auxiliary machinery spaces alongside insulated steam, water, and fuel systems.

During the decades when control valves of this type were manufactured — roughly the 1940s through the early 1980s — asbestos was a standard material in high-temperature gaskets and thermal insulation across the valve industry. According to asbestos litigation records, workers who installed or maintained Fulton Sylphon valves during this era have alleged exposure to asbestos-containing components associated with those products.

Asbestos-Containing Products

Fulton Sylphon did not manufacture asbestos as a raw material. However, according to asbestos litigation records, valves and controls associated with the company were alleged to have been furnished, installed, and maintained with asbestos-containing components during the period of their manufacture and use.

Body and bonnet gaskets were among the components most commonly identified in litigation involving valves of this type. Compressed asbestos fiber gaskets were an industry standard for sealing the joint between a valve body and its bonnet, and for flanged connections, during the mid-twentieth century. Plaintiffs have alleged that regulating and control valves were furnished and serviced with asbestos-containing gaskets, and that breaking or replacing these gaskets during maintenance could release fibers.

External insulation and lagging applied to valves operating in steam and hot-water service is documented in litigation records involving valves as an alleged source of asbestos fiber. Because insulation covering valves and connected piping degrades and requires periodic replacement, plaintiffs have alleged that removal and reapplication of lagging around this equipment disturbed asbestos-containing material.

Packing on non-bellows-sealed lines. While the company’s bellows-sealed valves were marketed as packless — using a metal bellows in place of conventional stem packing — litigation records involving comparable valve lines allege that asbestos-containing packing and gaskets were nonetheless associated with certain valve products and their maintenance. Individuals researching a specific product line are encouraged to confirm its configuration.

Whether a specific Fulton Sylphon model incorporated asbestos-containing components, and the extent of any such use, varies across individual cases and jurisdictions. Individuals seeking to confirm the composition of a particular unit are encouraged to consult product documentation from the relevant era or an attorney with access to product identification records.

Occupational Exposure

According to asbestos litigation records, exposure associated with control valves of this type has been alleged across a range of industrial and marine occupations. The following worker categories appear with regularity in claims involving valves and controls:

Pipefitters and Steamfitters — Workers who installed control and regulating valves in steam, water, and process piping, and who broke and remade flanged joints, have alleged exposure to asbestos-containing gaskets.

Machinists and Millwrights — Maintenance personnel who disassembled valves, replaced bonnet gaskets, and rebuilt regulating trim were among those who could disturb asbestos-containing sealing materials, according to plaintiffs’ allegations.

Boiler-Room and Powerhouse Workers — Workers responsible for steam and hot-water systems maintained temperature and pressure regulating valves as part of routine operations.

Insulators — Workers who applied or removed thermal lagging on valves and connected piping have alleged exposure to asbestos-containing insulation.

Navy Personnel and Shipyard Workers — Machinist’s mates and shipyard trades who operated and maintained regulating and control valves aboard naval vessels worked in enclosed machinery spaces where insulated steam and water systems were in close proximity.

Bystander and Secondary Exposure — Litigation records also reflect claims by workers who were not directly servicing this equipment but worked nearby while others disturbed asbestos-containing gaskets or insulation, as well as family members exposed through take-home contamination on work clothing.

The period of heaviest alleged exposure corresponds approximately to the 1940s through the early 1980s, consistent with the broader industrial use of asbestos-containing materials before regulatory action by the Occupational Safety and Health Administration (OSHA) and the Environmental Protection Agency (EPA) prompted a significant reduction in asbestos use across American industry.

It should be noted that the latency period for asbestos-related diseases — including mesothelioma, asbestosis, and asbestos-related lung cancer — is typically between 20 and 50 years following initial exposure.

Trust Fund / Legal Status

Fulton Sylphon Company is classified as a Tier 2 manufacturer for purposes of this reference site. This designation means that the company has been named as a defendant in asbestos-related litigation, but no dedicated asbestos bankruptcy trust fund has been established in its name. Accordingly, claims involving Fulton Sylphon valves are not resolved through a trust fund claims process in the same manner as claims against companies that reorganized under Chapter 11 specifically due to asbestos liability.

Plaintiffs have alleged in asbestos cases that asbestos-containing components were associated with Fulton Sylphon valves and controls. Because the company’s operations passed into Robertshaw-Fulton Controls and later corporate successors, individuals pursuing legal claims may need to account for corporate succession when identifying appropriate defendants. An experienced asbestos attorney can assist in tracing corporate histories and identifying responsible parties.

For individuals who worked with Fulton Sylphon valves and were also exposed to asbestos-containing products from other manufacturers — a common circumstance in industrial and marine environments — separate trust fund claims may be available through those manufacturers’ established asbestos trusts.

If you or a family member worked with or around Fulton Sylphon valves or control products during the 1940s through the early 1980s and has since been diagnosed with mesothelioma, asbestosis, or asbestos-related lung cancer, legal options may be available.

Key points to understand:

  • Fulton Sylphon has been named in asbestos litigation, but does not operate a dedicated asbestos bankruptcy trust fund. Claims would be pursued through direct civil litigation rather than a trust claims process.
  • Corporate succession involving Robertshaw-Fulton Controls and later entities may be relevant to identifying proper defendants.
  • Workers exposed to multiple asbestos-containing products — as was common in power plants, shipyards, and other industrial settings — may be eligible to file claims against multiple responsible parties, including manufacturers with established trust funds.
  • The long latency period for asbestos-related disease means that exposure from decades ago can give rise to claims today.
  • An attorney specializing in asbestos litigation can review your work history, identify relevant products and manufacturers, and advise on available legal remedies.

Documentation of your work history — including employers, job sites, job titles, and any product names or model numbers you can recall — is valuable when consulting with an attorney and should be preserved.

This reference article is provided for informational purposes to workers, families, and legal professionals researching asbestos exposure history. It does not constitute legal advice. Product identification and litigation history are drawn from publicly available court records and regulatory documentation.