Edwards Stokes 607Pumping speed 1,733 m³/h
Edwards Stokes 622 Process isolation (5MS, PIB), horizontal gas flow (HF), without motor
The Edwards Stokes 622 is a Roots pump (mechanical booster) of the Stokes 6″ series with a pumping capacity of 5525 m³/h at 3000 min⁻¹ and 6630 m³/h at 3600 min⁻¹. It is available without motor or with direct drive, for horizontal or vertical gas flow. Ehrler & Beck advises on sizing and service.
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- Pumping speed 5,525 m³/h 50 Hz 6,630 m³/h 60 Hz
| Variant | Part number |
|---|---|
| Mechanical seal (1MS), horizontal gas flow (HF), without motor | 900-622-MHR |
| Mechanical seal (1MS), vertical gas flow (VF), without motor | 900-622-MVR |
| Process isolation (5MS, PIB), horizontal gas flow (HF), without motor (selected) | 900-622-5HR |
| Process isolation (5MS, PIB), vertical gas flow (VF), without motor | 900-622-5VR |
| Mechanical seal, horizontal gas flow (HGF), direct drive 25 hp 460 V 60 Hz, energy-saving motor | 900622MH25EE |
| Mechanical seal, vertical gas flow (VGF), direct drive 25 hp 460 V 60 Hz, energy-saving motor | 900622MV25EE |
| Process isolation (PIB) with bypass, horizontal gas flow (HGF), direct drive 25 hp 460 V 60 Hz, energy-saving motor | 9006225H25EE |
Edwards Stokes 622 – Roots pump of the Stokes 6" series
The Stokes 6" boosters are robust mechanical boosters for use together with Stokes rotary piston pumps and other backing pumps. The Stokes 622 reaches 5525 m³/h at 3000 min⁻¹ and 6630 m³/h at 3600 min⁻¹; the permissible differential pressure is 333 mbar.Features
- Large shaft diameters, keyless ring-clamp gear system and dynamically balanced rotors
- Mechanical seal (1MS) or process isolation with five seals (5MS, PIB) for applications with dust and particles
- Without motor or with direct drive (1800 or 3600 min⁻¹), suitable for frequency converters
- Horizontal or vertical gas flow
Typical applications
Edwards names the automotive industry, chemical processing, heat treatment, leak detection, metallurgy, PET processing, pharmaceuticals, thermal processes, transformer drying and cable oil treatment, vacuum coating and vacuum melting.Versions
The variants differ in the shaft seal (1MS mechanical seal, 5MS process isolation), the gas flow direction (HF horizontal, VF vertical) and the drive (without motor or direct drive with energy-saving motor). The direct-drive versions have motors for 60 Hz; Edwards does not name a market for them.Advice and service
Ehrler & Beck supports you in sizing with suitable backing pumps, supplies spare parts and carries out maintenance and repair.| Pumping speed 50Hz | 5,525 |
|---|---|
| Pumping speed 60Hz | 6,630 |
| Weight | 445 |
| Length | 101.8 |
| Width | 43.8 |
| Height | 54.3 |
| Inlet connection flange | 8" ASA/ANSI |
| Outlet connection flange | 8" ASA/ANSI |
| Cooling method | Air cooling, Water cooling |
| Oil type | V-Lube H |
Additional technical data
| Technical data | Value |
|---|---|
| Design | Roots vacuum pump (mechanical booster), Stokes 6" series |
| Pumping capacity (displacement) | 5525 m³/h at 3000 min⁻¹, 6630 m³/h at 3600 min⁻¹ |
| Max. differential pressure | 333 mbar |
| Max. temperature rise / max. outlet temperature | 121 °C / 177 °C |
| Connections, inlet/outlet side | 8" ASA/ANSI |
| Oil | V-Lube H, 1.9 l (horizontal gas flow) or 4.1 l (vertical gas flow) |
| Cooling | air-cooled; versions with process isolation (PIB) water-cooled, 7.6–11.4 l/min at 30 °C |
| Weight without motor | 429 kg (1MS HF), 428 kg (1MS VF), 445 kg (5MS HF), 433 kg (5MS VF) |
| Ambient temperature | 12 to 40 °C |
| Materials | Housing, side covers and rotors ductile iron; mechanical seal silicon carbide |
| Dimensions without motor L × W × H | 1018 × 438 × 543 mm (HF), 1018 × 438 × 502 mm (VF) |
Edwards Stokes 607Pumping speed 1,733 m³/hEdwards Stokes 615Pumping speed 3,685 m³/hEdwards Stokes 615 BPPumping speed 3,685 m³/h