Leybold SCREWLINE - Dry Running Screw Vacuum Pumps for Oil-Free High Vacuum Applications
Leybold SCREWLINE - Dry Running Screw Vacuum Pumps
Leybold SCREWLINE screw vacuum pumps represent state-of-the-art technology in dry running, oil-free vacuum generation. These high-performance pumps achieve pumping speeds up to 630 m³/h and an ultimate vacuum of 1 x 10⁻² mbar (0.01 mbar), making them ideal for applications requiring absolutely oil-free vacuum.
Leybold SCREWLINE Product Range:
1. SCREWLINE SP 250
- Pumping Speed: 250 m³/h
- Ultimate Vacuum: 1 x 10⁻² mbar (0.01 mbar)
- Power: 7.5 kW
- Cooling: Air-cooled or water-cooled
- Ideal for: Medium high vacuum applications
2. SCREWLINE SP 630
- Pumping Speed: 630 m³/h
- Ultimate Vacuum: 1 x 10⁻² mbar (0.01 mbar)
- Power: 18.5 kW
- Cooling: Air-cooled or water-cooled
- Ideal for: Large high vacuum systems
3. SCREWLINE SPi 630 (Intelligent Version)
- Pumping Speed: 630 m³/h
- Ultimate Vacuum: 1 x 10⁻² mbar (0.01 mbar)
- Power: 18.5 kW
- Special Features: Integrated frequency inverter for variable speed
- Advantage: Energy savings up to 60% through intelligent control
- Ideal for: Variable load profiles, energy-efficient operation
Operating Principle of SCREWLINE Screw Pumps:
In dry running screw vacuum pumps, two parallel screw rotors rotate contact-free in the housing. Gas is transported axially from the inlet to the outlet and continuously compressed. The rotors do not touch each other or the housing - synchronization occurs via external gears. This enables absolutely oil-free operation without operating fluids in the pumping chamber.
Technical Advantages of SCREWLINE Pumps:
- ✓ 100% Oil-Free - no contamination from operating oil
- ✓ Dry Running - no operating fluids in pumping chamber
- ✓ High Ultimate Vacuum - down to 0.01 mbar without backing pump
- ✓ High Pumping Speed - efficient across wide pressure range
- ✓ Contact-Free Operation - minimal wear, long service life
- ✓ Very Low Maintenance - no vanes, no valves, no oil changes
- ✓ Energy Efficient - especially SPi version with frequency inverter
- ✓ Chemical Resistant - suitable for aggressive gases
- ✓ Compact Design - integrated all-in-one solution
- ✓ Quiet Operation - optimized sound damping
- ✓ Environmentally Friendly - no oil consumption, no emissions
Main Application Areas:
- Semiconductor Industry: CVD, etching, implantation, clean room applications
- Coating Technology: PVD, sputtering, evaporation, thin-film coating
- Chemical Industry: Distillation, drying, reactors, polymerization
- Pharmaceutical Industry: Freeze-drying, sterilization, API production, filtration
- Food Industry: Freeze-drying, concentration, vacuum packaging, degassing
- Solar Technology: Production of solar cells, thin-film modules
- Display Manufacturing: LCD, OLED, touchscreen production
- Research & Development: High vacuum chambers, materials research
- Medical Technology: Sterilization, laboratory equipment, analytics
- Plastics Industry: Extrusion, degassing, drying, polymerization
- Vacuum Furnaces: Heat treatment, sintering, brazing without contamination
- Analytics: Mass spectrometry, electron microscopy, surface analysis
- Leak Detection: Helium leak detectors, tightness testing
SCREWLINE vs. Other Vacuum Technologies:
| Criterion | SCREWLINE | Rotary Vane (oil) | Roots + Backing Pump |
|---|---|---|---|
| Oil-Free | ✓ 100% oil-free | ✗ Requires oil | ✓ Conditionally |
| Ultimate Vacuum | ✓ 0.01 mbar | ✓ 0.05 mbar | ✓✓ |
| Pumping Speed | ✓ 250-630 m³/h | ○ 10-1,200 m³/h | ✓✓ Very high |
| Backing Pump | ✓ Not required | ✓ Not required | ✗ Mandatory |
| Maintenance | ✓✓ Very low | ○ Regular oil changes | ○ Two pumps |
| Operating Costs | ✓ Low | ○ Medium (oil) | ○ Medium-high |
| Investment Costs | ○ High | ✓ Low | ✗ Very high |
| Environmental | ✓✓ No emissions | ✗ Oil disposal | ○ Depends on backing pump |
SP 250 vs. SP 630 vs. SPi 630 - Which is Right?
| Property | SP 250 | SP 630 | SPi 630 |
|---|---|---|---|
| Pumping Speed | 250 m³/h | 630 m³/h | 630 m³/h |
| Power | 7.5 kW | 18.5 kW | 18.5 kW |
| Frequency Inverter | ○ Optional | ○ Optional | ✓ Integrated |
| Energy Efficiency | ✓ Good | ✓ Good | ✓✓ Excellent (up to 60% savings) |
| Application | Medium systems | Large systems | Variable loads |
| Price | ✓ Lower | ○ Medium | ○ Higher |
When Are SCREWLINE Pumps the Best Choice?
Leybold SCREWLINE pumps are ideal when the following requirements exist:
- ✓ Absolutely oil-free vacuum mandatory (pharma, food, semiconductors)
- ✓ High ultimate vacuum without backing pump needed
- ✓ Aggressive or corrosive process gases
- ✓ Minimal maintenance requirements (24/7 operation)
- ✓ Clean room environment
- ✓ Low operating costs important (no oil costs)
- ✓ Environmentally friendly operation required
- ✓ Variable load profiles (SPi version)
Available Configurations:
- Air-Cooled: Standard for normal ambient conditions
- Water-Cooled: For high ambient temperatures or continuous operation
- ATEX Version: Explosion-proof for hazardous areas
- With Frequency Inverter (SPi): For variable speed and energy savings
- With Gas Ballast: For condensable vapors
- With Nitrogen Purge: For bearing protection
- Special Materials: For chemically aggressive media
- Control Systems: Local or remote monitoring and control
Operating Parameters and Maintenance:
- Maintenance Intervals: 12,000-16,000 operating hours
- Bearings: Lifetime-lubricated (outside pumping chamber)
- No Oil Changes: Completely dry running
- Ambient Temperature: +5°C to +40°C
- Noise Level: Approx. 65-75 dB(A) depending on model
- Service Life: >40,000 operating hours with proper maintenance
Energy Efficiency SPi Series:
The SPi 630 with integrated frequency inverter offers:
- ✓ Up to 60% energy savings compared to constant speed operation
- ✓ Automatic speed adjustment to actual gas load
- ✓ Optimal efficiency across entire pressure range
- ✓ Reduced operating costs through lower power consumption
- ✓ Extended service life through load-dependent operation
Our Complete Service for SCREWLINE Pumps:
- ✓ Sales: New SCREWLINE pumps in all configurations
- ✓ Consulting: Technical design and system planning
- ✓ Spare Parts: Rotors, bearings, seals, gears in stock
- ✓ Accessories: Silencers, filters, control systems, monitoring
- ✓ Maintenance: Regular inspections according to maintenance plan
- ✓ Repair & Overhaul: Professional general overhaul
- ✓ On-Site Service: Installation, commissioning, training
- ✓ Exchange Service: Rental pumps to minimize downtime
- ✓ System Integration: Complete vacuum systems with controls
- ✓ Remote Monitoring: Predictive maintenance and diagnostics
Selection Guide - Important Questions:
- What ultimate vacuum is required? (mbar absolute)
- What pumping speed is needed? (m³/h at operating pressure)
- What gases/vapors are being pumped?
- Load profile: Constant or variable?
- Ambient conditions: Temperature, space available
- Cooling: Air or water cooling preferred?
- Special requirements: ATEX, clean room, FDA compliance?
Why Leybold SCREWLINE?
- ✓ Technology leader in dry screw pumps
- ✓ Over 30 years of experience in screw pump technology
- ✓ Highest quality and reliability
- ✓ Proven in thousands of installations worldwide
- ✓ Optimal for oil-sensitive processes
- ✓ Excellent total cost of ownership (TCO)
- ✓ Worldwide service and spare parts availability
- ✓ Environmentally friendly and sustainable
Total Cost of Ownership (TCO):
Although SCREWLINE pumps have higher initial costs, they offer significantly lower total costs over their lifetime:
- ✓ No oil costs (purchase and disposal)
- ✓ Minimal maintenance costs
- ✓ Lower energy costs (especially SPi)
- ✓ Longer service life than oil-sealed pumps
- ✓ No process contamination = higher product quality
- ✓ No environmental costs for oil disposal