Transcription of Vacuum Systems: Understanding A Key …
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This Tech Sheet was developed by the Heat Exchange Institute s (HEI) Vacuum Technology Section. HEI is a trade association comprising the leading manufacturers of heat exchange and Vacuum equipment. HEI Tech Sheets are information tools and should not be used as substitutes for instructions from individual manufacturers. Always consult with individual manufacturers for specific instructions regarding their equipment. 09/25/14 Page 1 of 15 This sheet is reviewed periodically and may be updated. Visit for the latest version. #110 Vacuum Systems: Understanding A Key Component of a Modern Power Plant Introduction Vacuum systems have been used in the power industry for over 100 years. Today, Vacuum equipment, such as liquid ring Vacuum pumps, steam jet ejectors, and hybrid systems, are used for numerous applications in all types of power plants.
This equipment, often referred to as hoggers, is designed to quickly evacuate the steam side of the main condenser from atmosphere to a low pressure (usually 10" Hg Abs.) in order to allow the turbine to be brought online.
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