Edwards Vacuum Stokes 622 Vertical Vacuum Blower (Certified Refurbished)
Stokes 622 Mechanical Booster
The Stokes 622 Mechanical Booster is a high-capacity positive-displacement vacuum booster designed to work in conjunction with a backing pump to dramatically increase pumping speed and improve evacuation performance. Its rugged six-inch-class design uses dynamically balanced rotary lobes and is intended for demanding industrial vacuum applications.
The 622 is available in horizontal-flow and vertical-flow configurations, with mechanical-seal and process-isolation versions. It can operate at speeds up to 3,600 RPM and is available with approximately 25 HP of drive power. Stokes/Edwards lists the 622 at up to 6,630 m³/hr (3,900 CFM) nominal displacement at 3,600 RPM
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Specification |
Stokes 622 |
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Type |
Mechanical booster / Roots blower |
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Inlet flange |
8” ASA/ANSI |
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Outlet flange |
8” ASA/ANSI |
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Nominal displacement @ 1,800 RPM |
3,000 CFM |
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Nominal displacement @ 2,750 RPM |
~2,350 CFM* |
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Nominal displacement @ 3,600 RPM |
3,900 CFM |
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Max pressure differential |
250 Torr / 333 mbar |
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Typical motor |
25 HP |
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Motor |
3-phase |
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Cooling |
Air cooled |
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Noise |
<82 dB(A) |
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Configuration |
Horizontal-flow or vertical-flow |
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Seal options |
Mechanical seal / process isolation |
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Lubrication |
Oil-lubricated timing gear/bearing system |
Delivery time
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