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All About the Dry Vacuum Pump
All About the Dry Vacuum Pump
February 13, 2018

Vacuum pumps are an indispensable power source in numerous industries. They come in various types and designs depending on their applications. One common type widely used today is a dry vacuum pump, which does not use oils to produce a vacuum. It also prevents contact with the process gas but can be discharged to the atmosphere. Because there are no liquids that can remove the heat created during the compression, dry vacuum pumps run hot.


To regulate the internal temperature in the pump, a cooling jacket is employed to prevent excessive heat which can cause a system failure.


A dry vacuum pump can also be equipped with additional features, such as timing gears and close clearances placed in between the rotors and housing.


To help you consider your options, here are the two main restrictions with dry vacuum pumps.


Material for construction


A dry vacuum pump can easily handle corrosive vapors with regular iron construction, such as cast or ductile iron. They are inexpensive to manufacture and limit thermal growth as opposed to other materials such as stainless steel or other high alloys. This is because these metals can have excessive thermal growth characteristics.

In this case, this leads to lower efficiency or more back slippage of gas. This also results to degradation of the ultimate vacuum which is what is needed in the first place. Since a dry vacuum pump is made up of complex parts, using stainless steel or other high alloy to manufacture will be costly.


Handling liquid contaminants


Dry pumps find it difficult to handle any liquids and they generally require knockout pots. Of the various types of vacuum pumps, only the liquid ring pump can safely handle slugs of liquids. If the process of handling liquids results in constant repairs, then it’s best to rebuild a dry vacuum pump. There are, however, some cool-running dry pumps that offer simplified rebuilding procedure.

Since dry pumps are sensitive to process failures and they must be properly selected to ensure optimum performance. The features necessary for a complete operating dry vacuum pump system include timing gears, clearances, inlet filters, knockout pots, and discharge silencers. GlobalVac is proud to provide high quality vacuum pump systems, including the dry vacuum pump, made with the industry’s highest quality standards. We also offer excellent custom built and efficient pumps to meet the varying systems requirements of different industries.


For more information or to request a consultation, call or visit GlobalVac today!  

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