Solon Manufacturing Company Pressure Switches and Belleville Springs

Solon Manufacturing Company began manufacturing pressure controls in 1960 and has built a reputation of high quality and the ability to meet the demands of difficult applications and extreme environments. Solon’s industrial controls division manufactures a complete line of industrial pressure switches, including:

  • Vacuum
  • Differential
  • Hydraulic
  • Bellows actuated
  • Diaphragm actuated
  • Piston actuated
  • Explosion proof

Applications range from supplying low-pressure differential pressure switches for nuclear safety, high-pressure for oil and gas, SF6 gas density monitoring for utilities, and instruments to withstand corrosive environments.

Standard and custom engineered pressure controls

Solon’s unique pressure switch design allows many special features to be combined to specify unusual pressure switch functions for particular applications. Since many of the components are ‘off the shelf,’ a highly specialized switch can often be ordered and shipped the next day:

  • Adjustable pressure ranges from 0-1.5 WC through 10,000 PSI include pressure, vacuum, and differential pressure
  • S.P.D.T. electric switches with 15 amp, AC ratings are standard. High DC rated and hermetically sealed switches are easily specified
  • Simple sensitive mechanism produces low dead bands. An adjustable dead band is available on most models as an option
  • Surface and panel mounting brackets and pipe mounting fittings are available. Some models can be mounted directly to standard flanges

Pressure switch design and engineering

Experience and reliability – Solon’s design team provides efficient, low-cost solutions. Our engineers continually modify and enhance the designs of existing pressure switches to meet the demands of hundreds of applications. Many switches still remain an integral part of the processes for which they were originally designed.

Bellows actuated pressure switches

Solon Manufacturing’s bellows actuated pressure switches are built using 316 SS hydro-formed bellows and bodies. The hydro-formed bellow is welded into the body resulting in a compact, rugged, sensitive assembly. Life expectancy can vary depending on the installation from a minimum of 100,000 cycles to ten million cycles or beyond. The pressure ranges reach up to 5,000psi.

Diaphragm actuated pressure and vacuum switches

Solon’s diaphragm actuated pressure and vacuum switches employ elastomer diaphragms for their sensing elements. They are extremely cost effective and can be used on a wide range of media. A very sensitive unit can be built to withstand high overpressures and shock by fully supporting the diaphragm. Cycle lives beyond 20 million are capable.

Piston actuated pressure switches

Solon’s piston actuated pressure switches are designed for hydraulic or gas service and are constructed to withstand severe shock and vibration. The piston element employs a reinforced PTFE seal that is spring-energized. This results in consistent performance over millions of cycles.

Differential pressure switches

These switches are used on applications where pressure difference from a reference pressure must be indicated. Models are available that can sense a low differential on a very high static pressure. Other applications include level sensing, pressure drop across a filter, and two way pressure differential.

Explosion proof switches

Solon’s explosion proof switches are available in our 6PS and 7PS models and are UL and CSA listed.

Solon Belleville Springs, Disc Springs and Flange Washers for bolting applications

Solon Belleville Springs® and Solon Flange Washers® are used in a variety of bolting applications where high spring loads are required within a very small space. They compensate for differential thermal expansion, bolt creep, elastic interaction and vibration and by retaining their compressive energy.

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Press Release

Solon Announces Launch of Two New Products to Serve Electrical Industry

Solon Manufacturing Company has announced the release of the Solon Watchman SF6 and Solon Watchman SF6 Auto Fill. Both highly-engineered products are designed to monitor long-term leak rates on electrical circuit breakers that have potential for sulfur hexafluoride (SF6) gas leaks.

White Papers

Maintain Bolt Preload on Electrical Connections Using Belleville Springs

Belleville springs counteract the effects of differential thermal expansion, keeping your power plant or any facility safer.

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Press Release

19 May 2016

Solon Manufacturing Company has announced the release of the Solon Watchman SF6 and Solon Watchman SF6 Auto Fill. Both highly-engineered products are designed to monitor long-term leak rates on electrical circuit breakers that have potential for sulfur hexafluoride (SF6) gas leaks.

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21 July 2014

Solon’s vacuum switches have been installed at the Lawrence Livermore National Laboratory (LLNL), as part of a demonstration of nuclear fusion.

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2 May 2014

Solon Manufacturing Company, which originated in Solon, Ohio, US, in 1949, is celebrating its 65th anniversary.

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3 April 2014

Solon Manufacturing Company's Pressure Switch Division is pleased to announce the release of the new 2TC Smart Switch Monitoring System.

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13 February 2013

Solon Manufacturing Company is expanding operations with the purchase of two additional buildings. Located in Chardon, Ohio, the two buildings will add 24,545ft² to the current manufacturing area.

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1 February 2011

Solon Manufacturing Company is proud to announce that its quality management system has achieved ISO 9001:2008 registration. This ISO 9001:2008 registration validates the effectiveness of Solon's focus placed on complete customer satisfaction by meeting customer requirements for enginee

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26 May 2010

Solon Manufacturing, the longest-standing manufacturer of Belleville Springs in America will feature a complete line of Solon Belleville Springs used in valve and flange live loading during the Global Petroleum Show in Calgary, Canada, 8-10 June 2010. Solon Manufacturing will be at booth #2007. Read more

7 July 2009

Solon Manufacturing will exhibit their Solon Belleville Springs, Solon Flange Washers and Solon Disc Springs, which maintain bolt preload on bolted joints for various industries, at NECA. The event, which is for alternative energy solutions and sustainable electrical construction, takes

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27 May 2009

Four fraternity brothers from Case Western Reserve in Cleveland created Solon Manufacturing Company in 1949. These four men were engineers, inventors, risk takers and forward thinkers. It was a time of post-war industrialism in northeast Ohio. They built a 3,000sqft building and began manufacturi

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30 November 2008

Solon Manufacturing Company has announced the launch of a new website. Solon has two product lines: Industrial Controls and Belleville Springs. Solon’s pressure switch section includes a search by category, housing or sensing element. Solon’s Belleville section includes enhanced search features s

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27 June 2008

White Paper Available at Solon Manufacturing’s Booth Solon Manufacturing, the longest standing manufacturer of Belleville Springs in America will feature a complete line of Solon Belleville Springs used in valve and flange live loading during the National Reliability & Maintenance

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25 January 2008

Solon Manufacturing Company to give technical presentations "Maintaining Bolt Preload on Electrical Connections" and "SF6 Gas Density Monitoring for Circuit Breakers" at 2008 IEEE Transmission and Distribution Show, Chicago Solon Manufacturing, a manufacturer of Belleville

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14 November 2007

Solon Manufacturing Co. a global leader in the development and manufacturing of the highest quality pressure switches for the oil and gas industry is featuring the 6PS Series of explosion-proof pressure switches. These rugged explosion-proof switches meet the demands of oil and gas production and

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