August 2003

Special Report: Fluid Flow and Rotating Equipment

Consider diaphragm pumps for high environmental demands

Other benefits include lower maintenance costs and higher efficiency

Keller, R., LEWA Herbert Ott GmbH+Co.

Environmental regulations require certain fluids to be conveyed, pumped or injected in an absolutely environmentally safe way. As a result of the reduced sulfur content to lower ppm values, for example, a mixture of H2S and CO2 is produced during refining processes. Large quantities of this mixture must be injected at pressures of approximately 300 bar. This fluid makes extreme demands on existing pump systems. Pump types frequently used, such as triplex or quintuplex plunger pumps as well as high-speed centrifugal pumps, have shown during trials and in operation that they cannot meet the demands. The fluid is highly tox

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