Cavitation noise reduction system for a rotary screw vacuum pump
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United States of America Patent
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Jan 23, 2007
Issued Date -
N/A
app pub date -
Jun 3, 2004
filing date -
Jun 3, 2004
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Abstract
A rotary screw vacuum pump system includes a vacuum bypass system, which communicates with a first closed cell formed by the rotor system. An air bypass valve within an air communication conduit is controlled by a solenoid valve that operates in response to a pressure switch. The pressure switch is in communication with a vacuum pump suction conduit that draws suction for a suction system attached thereto. The solenoid valve is activated by the pressure switch at a vacuum level slightly below the point at which the undesirable cavitation noise generated at terminal vacuum condition begins.
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