Leybold E/DK Piston Vacuum Pumps - Extremely Robust for Toughest Conditions
Leybold Piston Vacuum Pumps of the E and DK series are the ultimate solution for demanding industrial applications with high contamination levels. These oil-sealed piston vacuum pumps are characterized by their exceptional robustness and contamination tolerance, making them ideal for processes with dust, particles, or aggressive gases.
Leybold Piston Pump Product Range:
1. E-Series - Single-Stage Piston Vacuum Pumps
- 4 models: E 35, E 75, E 150, E 250
- Pumping Speed: 25-250 m³/h
- Ultimate Vacuum: 0.05 mbar (without gas ballast)
- Power: 1.5-7.5 kW
- Design: Single-stage for rough vacuum applications
- Ideal for: Industrial applications with high contamination
2. DK-Series - Two-Stage Piston Vacuum Pumps
- 3 models: DK 80, DK 140, DK 200
- Pumping Speed: 80-200 m³/h
- Ultimate Vacuum: 0.0005 mbar (5 x 10⁻⁴ mbar)
- Power: 5.5-11 kW
- Design: Two-stage for high vacuum applications
- Ideal for: Demanding high vacuum with contamination
Operating Principle of Piston Vacuum Pumps:
In piston vacuum pumps, one or more pistons move reciprocally in cylinders, similar to a combustion engine. During the downward stroke, gas is drawn in through an inlet valve; during the upward stroke, it is compressed and expelled through an outlet valve. Oil serves for sealing, lubrication, and cooling of the moving parts. The two-stage design (DK series) uses two pistons in series for deeper ultimate vacuum.
Technical Advantages of Leybold E/DK Piston Pumps:
- ✓ Extremely Robust - built for toughest industrial conditions
- ✓ High Contamination Tolerance - ideal for dusty and dirty processes
- ✓ Particle Insensitive - dust and particles are flushed out with oil
- ✓ Aggressive Gas Compatible - suitable for chemically aggressive media
- ✓ High Durability - designed for decades of operation
- ✓ Reliable Operation - even under extreme conditions
- ✓ Simple Maintenance - easy access to all components
- ✓ Gas Ballast Function - for condensable vapors
- ✓ Powerful - high pumping speeds even at low pressures
- ✓ Long Service Life - proven technology for decades
Available E-Series Models in Detail:
| Model | Pumping Speed (m³/h) | Ultimate Vacuum | Motor Power | Weight (approx.) |
|---|
| E 35 |
25 |
0.05 mbar |
1.5 kW |
120 kg |
| E 75 |
65 |
0.05 mbar |
3 kW |
180 kg |
| E 150 |
140 |
0.05 mbar |
5.5 kW |
320 kg |
| E 250 |
250 |
0.05 mbar |
7.5 kW |
500 kg |
Available DK-Series Models in Detail:
| Model | Pumping Speed (m³/h) | Ultimate Vacuum | Motor Power | Weight (approx.) |
|---|
| DK 80 |
80 |
0.0005 mbar |
5.5 kW |
350 kg |
| DK 140 |
140 |
0.0005 mbar |
7.5 kW |
450 kg |
| DK 200 |
200 |
0.0005 mbar |
11 kW |
650 kg |
Main Application Areas:
- Chemical Industry: Reactors, distillation, drying, filtration with aggressive chemicals
- Pharmaceutical Industry: Drying, filtration, freeze-drying with contamination
- Plastics Industry: Extrusion, degassing, drying of granulates
- Food Industry: Drying, concentration, vacuum evaporation
- Wood Industry: Impregnation, drying, autoclave processes
- Paper Industry: Dewatering, vacuum presses, suction systems
- Foundries: Degassing, mold venting, dust extraction
- Metallurgy: Degassing processes, vacuum casting
- Environmental Technology: Wastewater treatment, biogas, exhaust gas cleaning
- Ceramics Industry: Vacuum extrusion, drying, degassing
- Glass Industry: Vacuum lamination, degassing
- Textile Industry: Dyeing, impregnation, drying
When Are Piston Pumps the Best Choice?
Leybold E/DK piston pumps are ideal when the following conditions exist:
- ✓ High dust or particle load in the process
- ✓ Aggressive or corrosive gases
- ✓ Frequent condensable vapors (with gas ballast)
- ✓ Extremely robust pump required
- ✓ Long service life more important than low maintenance
- ✓ Harsh industrial environment
- ✓ Continuous operation under tough conditions
Piston Pumps vs. Rotary Vane Pumps:
| Criterion | Piston Pump (E/DK) | Rotary Vane Pump |
|---|
| Contamination Tolerance |
✓✓ Very high |
○ Low (vane wear) |
| Particle Resistance |
✓✓ Excellent |
✗ Problematic |
| Aggressive Gases |
✓ Very good |
○ Conditionally |
| Durability |
✓✓ Extremely durable |
✓ Good |
| Maintenance |
○ More complex |
✓ Simpler |
| Noise Level |
○ Higher (pulsation) |
✓ Quieter |
| Vibration |
○ Higher |
✓ Lower |
| Operating Costs |
○ Higher (oil consumption) |
✓ Lower |
| Investment Costs |
○ Higher |
✓ Lower |
E-Series vs. DK-Series - Which is Right?
| Property | E-Series (Single-Stage) | DK-Series (Two-Stage) |
|---|
| Ultimate Vacuum |
○ 0.05 mbar |
✓ 0.0005 mbar |
| Application |
Rough vacuum, backing pump |
High vacuum applications |
| Complexity |
✓ Simpler |
○ More complex |
| Price |
✓ Lower |
○ Higher |
| Energy Consumption |
✓ Lower |
○ Higher |
Operating Parameters and Maintenance:
- Vacuum Oil: Special piston pump oils (high viscosity)
- Oil Change Intervals: 500-1,500 operating hours (depending on contamination)
- Valve Inspection: Every 2,000-4,000 operating hours
- Piston Rings: Replacement every 10,000-20,000 operating hours
- General Overhaul: After 20,000-40,000 operating hours
- Ambient Temperature: +5°C to +40°C
- Cooling: Air-cooled or water-cooled (model dependent)
- Noise Level: 75-85 dB(A) (higher than rotary vane pumps)
- Vibration Damping: Foundation or dampers recommended
Available Configurations:
- Standard Design: For normal industrial applications
- With Gas Ballast: For condensable vapors and moisture
- With Oil Separator: For reduced oil mist emissions
- ATEX Design: Explosion-proof for hazardous areas
- Corrosion-Resistant: Special materials for aggressive gases
- Water-Cooled: For high ambient temperatures or continuous operation
- Different Voltages: 400V three-phase standard, other voltages on request
Our Complete Service for E/DK Piston Pumps:
- ✓ Sales: New piston pumps of all E and DK series
- ✓ Consulting: Technical design for your application
- ✓ Spare Parts: Pistons, piston rings, valves, bearings, seals in stock
- ✓ Vacuum Oils: Special piston pump oils for optimal lubrication
- ✓ Accessories: Intake filters, oil separators, silencers, pressure gauges
- ✓ Maintenance: Regular inspections and oil changes
- ✓ Repair & Overhaul: Professional general overhaul in our workshop
- ✓ On-Site Service: Installation, commissioning, troubleshooting
- ✓ Exchange Service: Rental pumps to minimize downtime
- ✓ Technical Support: Telephone and email support
Selection Guide - Important Questions:
- What pumping speed is required? (m³/h)
- What ultimate vacuum is needed? (mbar absolute)
- What contamination level? (clean air, dust, particles, aggressive gases)
- Operating mode: Continuous or intermittent?
- Process gases: What is being pumped? Vapors present?
- Environment: Normal or hazardous area (ATEX)?
- Space: Foundation available for vibration damping?
Why Leybold E/DK Piston Vacuum Pumps?
- ✓ Proven technology for over 100 years
- ✓ Unmatched robustness and durability
- ✓ Highest contamination tolerance of all vacuum pump types
- ✓ Ideal for harsh industrial conditions
- ✓ Long service life (30+ years not uncommon)
- ✓ Worldwide availability of spare parts
- ✓ "Workhorses" of vacuum technology
- ✓ Low-cost alternative for contaminated processes
