Product Description
Stokes 622 Horizontal gas flow — Mechanical-seal bare shaft
New 622 mechanical booster • Part 900-622-MHR
The Stokes 622 6-inch mechanical booster is a rugged industrial Roots booster available with mechanical-seal or process-isolation arrangements and horizontal or vertical gas flow.
Features
- Bare-shaft and direct-drive configurations
- Horizontal or vertical gas-flow orientation
- Mechanical-seal and five-seal process-isolation arrangements
- Large sight glass and magnetic drain plugs simplify maintenance
Performance Graph
The graph is a VPS presentation of published Edwards family data. Confirm operating point, backing-pump capacity, process gas and motor selection before ordering.
Technical Specifications
| Specification | Value |
|---|---|
| Model | 622 |
| Part number | 900-622-MHR |
| Selected configuration | Stokes 622 Horizontal gas flow — Mechanical-seal bare shaft |
| Nominal displacement | 5,100 m³/h at 2,750 rpm; 5,525 at 3,000 rpm; 6,630 at 3,600 rpm |
| Maximum pressure differential | 333 mbar (250 Torr) |
| Inlet connection | ASA/ANSI 8" |
| Outlet connection | ASA/ANSI 8" |
| Motor / drive | 18 kW / 25 hp for direct-drive configurations |
| Cooling | Air or water cooled, depending on shaft-seal/process-isolation configuration |
| Sound level | <82–85 dB(A), configuration dependent |
| Typical weight | Approx. 740–1,370 lb, configuration dependent |
| Typical dimensions | Verify orientation-specific drawing before installation |
| Lubricant capacity | 1.9 L horizontal flow; 4.1 L vertical flow |
Available Configurations
| Part number | Configuration | Electrical / drive | Gas flow | Availability |
|---|---|---|---|---|
| 900-622-MVR | Stokes 622 Vertical gas flow — Mechanical-seal bare shaft | Bare shaft; select compatible motor and drive | Vertical gas flow | Call for Pricing |
| 900-622-MHR | Stokes 622 Horizontal gas flow — Mechanical-seal bare shaft | Bare shaft; select compatible motor and drive | Horizontal gas flow | This configuration |
| 900-622-5VR | Stokes 622 Vertical gas flow — Process-isolation bare shaft | Bare shaft; select compatible motor and drive | Vertical gas flow | Call for Pricing |
| 900-622-5HR | Stokes 622 Horizontal gas flow — Process-isolation bare shaft | Bare shaft; select compatible motor and drive | Horizontal gas flow | Call for Pricing |
| 900622MV25EE | Stokes 622 Vertical gas flow — 25 hp energy-efficient motor | 25 hp, 230/460V, 3-phase, 60 Hz | Vertical gas flow | Call for Pricing |
| 900622MH25EE | Stokes 622 Horizontal gas flow — 25 hp energy-efficient motor | 25 hp, 230/460V, 3-phase, 60 Hz | Horizontal gas flow | Call for Pricing |
| 9006225H25EE | Stokes 622 Horizontal gas flow — 25 hp process-isolation bypass | 25 hp, 230/460V, 3-phase, 60 Hz | Horizontal gas flow | Call for Pricing |
Maintenance, Oil & Repair Kits
| Item | Guidance |
|---|---|
| Lubricant | Stokes V-Lube H or approved equivalent. |
| Repair parts | Email VPS with the complete 622 part number, gas-flow orientation and seal arrangement. |
| Service note | The process chamber is dry; the gear and seal reservoirs still require lubricant. |
Applications
Mechanical boosters are used to increase pumping speed and reduce pump-down time in industrial vacuum systems. Typical duties include heat treatment, metallurgy, vacuum coating, chemical processing, steel degassing, vacuum drying and large chamber evacuation. Final performance depends on the backing pump and system conductance.
VPS Resources
Need help sizing the booster system?
Send the required pumping speed, pressure range, backing pump, process gas, voltage, frequency, gas-flow orientation and seal requirements. VPS will help confirm the correct part number.
