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  Diaphragm pumps

Diaphragm pumps are common industrial pumps that normally use positive displacement to move liquids. These devices typically include a single diaphragm and chamber, as well as suction and discharge check valves to prevent backflow. Pistons are either coupled to the diaphragm, or used to force hydraulic oil to drive the diaphragm. Housing materials might include aluminum, brass or bronze, cast iron, plastic and stainless steel. Rugged diaphragm pump housings can withstand high temperatures and may be exposed to various grades of water, oils, and other solvents.

Hargraves Technology Hargraves Technology produces a line of long life and highly reliable diaphragm, vacuum, and liquid pumps. These miniature pumps are used in positive pressure, vacuum service, and liquid delivery.
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