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OPW was founded in 1892 as the Ohio Pattern Works & Foundry Company.
By 1930 the company had already built a reputation as a leading supplier of nozzles, valves, fittings and couplings to the petroleum industry.
1948 G. L. Ohrstrom & Associates acquires company and changes name to OPW
1949 OPW introduces Kamlok® cam and groove quick-disconnect coupling
1960 Dover Corporation acquires OPW
1961 Kamvalok® dry disconnect coupling is the result of OPW's pioneering efforts to reduce liquid product loss
1983 OPW reorganized into three separate business units; OPW Engineered Systems, OPW Fluid Handling, and OPW Fueling Components
1988 OPW splits three business units into three distinct companies
1989 OPW Fluid Handling changes its name to CIVACON (Cincinnati Valve and Control)
1999 OPW relocates Civacon Cincinnati, Ohio facility to Kansas City.
2001 OPW Fluid Transfer Group was formed to include OPW-ES, Civacon/Knappco, Midland Manufacturing and OPW Fluid Transfer Group Europe B.V.
2006 Acquired the Epsilon dry disconnect product line from Eaton Corp.
2009 OPW acquires Hiltap Fittings, a leading supplier of high/low pressure and temperature fittings
2013 OPW acquires Lianyungang Jump Petroleum Chemical Machine Co.
In 2017, OPW is proudly celebrated 125 years in business.
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OPW, a Dover Company may also be known as or be related to OPW, a Dover Company and Opw, A Dover Company.