Refurbished Stokes 622 Rotary Lobe Booster Pump
The Stokes 622 rotary lobe booster pump is well regarded as the workhorse of many industries, including Vacuum Heat Treating, Sintering, Vacuum Arc and Induction Melting, as well as many others. The Stokes 622 is ideal for larger chambers and systems due to its pumping capacity. This booster pump can be configured as either belt drive or direct drive, as well horizontal (Stokes 622-1) or vertical flow (Stokes 622-2).
More recent versions of the Stokes 622 include the integration of mechanical seals, high speed balanced lobes and water cooled bearing housings to enable running the booster at higher speeds without increasing its footprint. MHR/MVR types which have a single mechanical seal on the input shaft and can be run up to 3600 RPM achieving 3900 CFM. For the same speeds plus the ability to isolate process gases in the swept volume, the 5HR and 5VR variants additionally feature internal mechanical seals and water cooled bearing housing to remove the additional heat generated.
Note: Other motor voltages available upon request.
All 622 booster pumps share the same data below. Download the full manual below.
|Pumping Speed||2000 cfm|
|Ultimate Pressure without Gas Ballast||10 mTorr|
|Dimensions (Inches)||26″H x 26″L x 14″W|
|Oil Capacity||4 Gallons|