Elmo Rietschle Screw Vacuum Pumps - S-VSA/VSB/VSI Series Dry Running High Vacuum Pumps
Elmo Rietschle Screw Vacuum Pumps - S-VSA/VSB/VSI Series
Elmo Rietschle Screw Vacuum Pumps of the S-Series (formerly Gardner Denver) are state-of-the-art dry-running vacuum pumps for demanding industrial applications. These pumps achieve an ultimate vacuum down to 0.05 mbar and offer flow rates of 80-650 m³/h, ideal for chemical, pharmaceutical, and semiconductor industries.
Elmo Rietschle Screw Pump Product Range:
1. S-VSA Series - High-Performance Screw Pumps
- 4 models: S-VSA 150, S-VSA 330, S-VSA 400, S-VSA 800
- Flow Range: 105-650 m³/h
- Ultimate Vacuum: 0.05-0.3 mbar
- Power: 4-18.5 kW
- Speed: 2,850 rpm
- Ideal for: High vacuum applications with high throughput
2. S-VSB Series - Standard Screw Pumps
- 5 models: S-VSB 120, S-VSB 200, S-VSB 320, S-VSB 430, S-VSB 800
- Flow Range: 80-500 m³/h
- Ultimate Vacuum: 0.05-0.3 mbar
- Power: 3-15 kW
- Speed: 2,850 rpm
- Ideal for: Versatile industrial applications
3. S-VSI Series - Compact Screw Pumps
- 2 models: S-VSI 100, S-VSI 300
- Flow Range: 110-320 m³/h
- Ultimate Vacuum: 0.1 mbar
- Power: 3-7.5 kW
- Speed: 2,880 rpm
- Ideal for: Medium vacuum ranges, compact design
S-VSA 150, S-VSA 330, S-VSA 400, S-VSA 800, S-VSB 120, S-VSB 200, S-VSB 320, S-VSB 430, S-VSB 800, S-VSI 100, S-VSI 300
Operating Principle of Screw Vacuum Pumps:
In screw vacuum pumps, two intermeshing screw rotors rotate contact-free in the housing. Gas is transported axially from the suction side to the pressure side and continuously compressed. Synchronization occurs via external gears, ensuring an absolutely oil-free pumping chamber.
Technical Advantages of Rietschle Screw Pumps:
- ✓ 100% Oil-Free - no contamination from operating oil
- ✓ Dry Running - no operating fluids in pumping chamber
- ✓ High Ultimate Vacuum - down to 0.05 mbar without backing pump
- ✓ High Pumping Speed - efficient across wide pressure range
- ✓ Contact-Free Operation - minimal wear, long service life
- ✓ Low Maintenance - no vanes, no valves
- ✓ Energy Efficient - optimal efficiency
- ✓ Chemical Resistant - suitable for aggressive gases
- ✓ Particle Insensitive - tolerant to dust
- ✓ Compact Design - space-saving installation
- ✓ Quiet Operation - optimized sound damping
Screw Pumps vs. Other Vacuum Technologies:
| Criterion | Screw Pump | Rotary Vane (oil-free) | Roots + Backing Pump |
|---|---|---|---|
| Ultimate Vacuum | ✓ 0.05-0.1 mbar | ○ 100-150 mbar | ✓ |
| Pumping Speed | ✓ High (80-650 m³/h) | ○ Low (3-150 m³/h) | ✓ Very high |
| Oil-Free | ✓ 100% oil-free | ✓ 100% oil-free | ✓ With oil-free backing pump |
| Backing Pump Required | ✓ No | ✓ No | ✗ Yes, mandatory |
| Chemical Resistant | ✓ Very good | ○ Conditionally | ✓ Good |
| Maintenance | ✓ Very low maintenance | ○ Vane replacement needed | ○ Two pumps |
| Investment Costs | ○ Medium-high | ✓ Low | ✗ High (system) |
| Operating Costs | ✓ Low | ✓ Low | ○ Medium |
Main Application Areas:
- Chemical Industry: Distillation, drying, reactors, rectification, solvent recovery
- Pharmaceutical Industry: Freeze-drying, sterilization, API production, crystallization, filtration
- Semiconductor Industry: CVD processes, etching, ion implantation, sputtering
- Coating Technology: PVD, thin-film coating, plasma treatment
- Food Industry: Freeze-drying, aroma extraction, concentration, degassing
- Plastics Industry: Polymerization, extrusion, degassing, drying
- Analytics & Laboratory: Mass spectrometry, electron microscopy, surface analysis
- Metallurgy: Vacuum melting, heat treatment, degassing
- Research & Development: High vacuum chambers, materials research, thin-film technology
- Solar Technology: Production of solar cells, thin-film modules
- Optical Industry: Lens coating, anti-reflection coatings
When Are Screw Pumps the Best Choice?
Screw vacuum pumps are ideal when the following requirements exist:
- ✓ Absolutely oil-free vacuum required (pharma, food, electronics)
- ✓ High ultimate vacuum down to 0.05 mbar without additional backing pump
- ✓ Aggressive or corrosive gases in the process
- ✓ High pumping speed across wide pressure range
- ✓ Minimal maintenance requirements (24/7 operation)
- ✓ Particle load in process gas
- ✓ Continuous operation required
Available Designs and Options:
- Standard Design: For air and neutral gases
- Chemical Resistant: Special coatings and materials
- With Gas Ballast: For condensable vapors
- With Nitrogen Purge: For bearing protection
- Frequency Inverter Controlled: Variable speed for optimal energy efficiency
- ATEX Design: For hazardous areas
- With Condenser: For processes with high vapor content
- Stainless Steel Design: For highest corrosion resistance
Operating Parameters and Maintenance:
- Cooling System: Air-cooled or water-cooled (optional)
- Ambient Temperature: +5°C to +40°C
- Maintenance Intervals: Approx. 8,000-12,000 operating hours
- Bearings: Lifetime-lubricated rolling bearings
- Seals: PTFE or FKM for chemical resistance
- Noise Level: Approx. 60-75 dB(A) (depending on model)
Our Complete Service for Rietschle Screw Pumps:
- ✓ Sales: New screw pumps of all S-series
- ✓ Consulting & Design: Technical dimensioning for your application
- ✓ Spare Parts: Rotors, bearings, seals, gears, housing parts in stock
- ✓ Accessories: Silencers, filters, purge systems, frequency inverters
- ✓ Maintenance: Regular inspections according to manufacturer specifications
- ✓ Repair & Overhaul: Professional general overhaul
- ✓ On-Site Service: Installation, commissioning, troubleshooting
- ✓ Exchange Service: Minimal downtime through rental units
- ✓ System Integration: Complete vacuum systems with controls and monitoring
- ✓ Training: Operator training and technical instruction
Selection Guide - Important Questions:
- What ultimate vacuum is required? (mbar absolute)
- What volume flow is needed? (m³/h at what pressure)
- What gases are being pumped? (composition, aggressive, condensable)
- Operating mode: Continuous or cyclic?
- Environmental conditions: Temperature, space constraints
- Special requirements: ATEX, clean room, FDA-compliant?
- Integration: Standalone or in existing system?
Why Elmo Rietschle Screw Pumps?
- ✓ Leading technology in dry-running screw pumps
- ✓ Decades of experience in demanding applications
- ✓ Highest reliability and quality
- ✓ Optimal for chemistry and pharmaceuticals
- ✓ Worldwide availability of spare parts
- ✓ Excellent service and support
- ✓ Proven technology in thousands of installations worldwide