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Gorman-Rupp was founded in 1933 by two entrepreneurs, J.C. Gorman and Herb Rupp. Their simplified design of a self-priming, centrifugal pumps would form the core of their initial product line. [3] The company was contracted by the United States military during the Second World War. Diversifying their product line to include a variety of ...
The basic working principle of an air-operated double diaphragm pump. Cross-section sketch of diaphragm fuel pump Air-operated double diaphragm pump. A diaphragm pump (also known as a Membrane pump) is a positive displacement pump that uses a combination of the reciprocating action of a rubber, thermoplastic or teflon diaphragm and suitable valves on either side of the diaphragm (check valve ...
The company continued its acquisitions, buying the John Crane Company for $204 million and taking a 49% stake in the UK based Crane Packaging, followed by Warren Rupp for $25 million. With the heavy debt created by the LBO, the early 1980s recession , and Japanese competition in the machine tool manufacturing industry, profits disappeared.
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Diaphragm pumps have the advantage that they pump relatively lightly due to the lack of pulling rods and are corrosion resistant. Their disadvantage is that they need a specific length of tubing and high quality rubber diaphragms, which are costly and are relatively inefficient due to the extra work needed to deform the diaphragm.
Instead, the agency said, the federal government "restarted federal water pumps after they were offline for maintenance for three days," adding, "State water supplies in Southern California remain ...
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