Marsh Bellofram


The Bellofram Group of Companies is an AS9100C and ISO9001:2008 certified leading global manufacturer of high-performance OEM, industrial and process control instrumentation, including timers and counters, digital controllers and panel meters, RTD’s and thermocouples, pressure instruments and gauges, FRLs, cylinders, natural gas and propane pressure regulators, air pressure regulators and transducers, tank and liquid level measurement systems, pump and motor protection switches and alternating relays, as well as sensors, DC tachometers, encoders, industrial diaphragms, and specialty silicones.

Products are organized and sold under fully dedicated divisions, each staffed with an experienced and highly trained team of dedicated technical sales, applications engineering and customer service support personnel.

Marsh Instruments

Marsh Instrument Company was originally established in 1865 in Skokie, Illinois, as the James P. Marsh Company. Marsh was acquired in 1988 by Desco and relocated to Hastings, Nebraska to share operations with Desco’s Marshalltown Instruments. Marshalltown had been founded in 1918 in Marshalltown, Iowa. The two gauge and thermometer product lines were consolidated by November, 1993 into a Marsh/Marshalltown product line.

Marsh Bellofram is a world class instrumentation manufacturer, with powerful product support, and near flawless distribution. Our mission is to engage the current and future needs of our customers with swift, professional service while providing the highest quality instrumentation products at the most competitive prices.

Bellofram Corporation: THE ROLLING DIAPHRAGM “ The Key to Bellofram Products”

In 1950 it was becoming increasingly apparent that designers of machines, instruments and automotive vehicles could not continue to live with the serious problems of friction and leakage which had long been associated with O-rings, chevron seals, cup packings, metal bellows and other conventional seals. At that time, Bellofram initiated what proved to be a five-year program of intensive research and development, to produce a frictionless and leak-proof rolling seal that would handle pressures, temperatures and stroke lengths over an extremely wide range. At the end of the five years, the company had produced a complete line of rolling seal diaphragms for a broad variety of industrial needs.

The immediate, wide-spread acceptance of this successful new principle of sealing resulted in rapid company growth, and in 1957 Bellofram erected facilities in Burlington, Massachusetts. John Taplin, the founder and original owner of Bellofram, designed air cylinders, air regulators, gauge protectors (diaphragm seals), and other pneumatic and hydraulic devices using his diaphragms. In the early 1980’s Rexnord purchased Bellofram, and then in 1986 sold Bellofram to the Desco Corporation of Columbus, Ohio. Desco moved Bellofram from its plants in Pelham, New Hampshire and Burlington, Massachusetts to a new, modern facility in Newell, WV, designed, constructed and fully integrated specifically for the high-volume, high-precision manufacture of elastomer products.

Marsh and Bellofram, sister companies of the Desco Corporation, were combined into Marsh Bellofram in January 1995. Marsh Bellofram Corporation has its headquarters in Newell, West Virginia, about 25 miles west of Pittsburgh, Pennsylvania in the northeastern United States.

The building has been carefully laid out to ensure the smooth, efficient flow of materials and work in process. Its complement of tools, automatic machinery and specialized processing and production equipment is one of the most extensive in the industry. With significant resources of technical personnel and skilled production workers, the Newell facility is well suited to the economical manufacture of highly engineered elastomeric products and precision regulators.

For more information on Marsh Bellofram, please visit their website at:

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