Elmo Rietschle Liquid Ring Vacuum Pumps - LR and TR Series for Industrial Applications
Elmo Rietschle Liquid Ring Vacuum Pumps - LR and TR Series
Elmo Rietschle Liquid Ring Vacuum Pumps of the LR and TR series (formerly Gardner Denver) are the ideal solution for industrial vacuum applications with wet, dusty, or aggressive gases. These robust pumps achieve an ultimate vacuum down to 33 mbar and offer flow rates of 45-2,150 m³/h.
Elmo Rietschle Liquid Ring Pump Product Range:
1. LR Series - Standard Design in Cast Iron
- 15 models from LR 45 to LR 2150
- Flow Range: 45-2,150 m³/h
- Ultimate Vacuum: 33 mbar (with water temperature 15°C)
- Power: 0.75-55 kW
- Material: Cast iron - economical and robust
- Application: Standard industrial applications
2. TR Series - Stainless Steel Design
- 15 models from TR 45 to TR 2150
- Flow Range: 45-2,150 m³/h
- Ultimate Vacuum: 33 mbar (with water temperature 15°C)
- Power: 0.75-55 kW
- Material: Stainless steel AISI 316L - corrosion resistant
- Application: Chemistry, pharmaceuticals, aggressive media
LR 45, LR 70, LR 110, LR 160, LR 230, LR 340, LR 480, LR 650, LR 750, LR 900, LR 1050, LR 1300, LR 1550, LR 1850, LR 2150, TR 45, TR 70, TR 110, TR 160, TR 230, TR 340, TR 480, TR 650, TR 750, TR 900, TR 1050, TR 1300, TR 1550, TR 1850, TR 2150
Operating Principle of Liquid Ring Vacuum Pumps:
In liquid ring pumps, an eccentrically mounted impeller rotates in a water-filled housing. Through centrifugal force, a liquid ring forms, creating chambers with variable volume between the blades. When the chambers enlarge, gas is drawn in; when they decrease, gas is compressed and expelled.
Technical Advantages of Rietschle Liquid Ring Pumps:
- ✓ Robust and Reliable - simple construction, low wear
- ✓ Moisture Insensitive - ideal for wet and moist gases
- ✓ Dust Tolerant - particles are flushed out with water
- ✓ Isothermal Compression - constant temperature through water cooling
- ✓ Explosion-proof - no spark formation, ideal for flammable gases
- ✓ Low Maintenance - no valves, no vanes to replace
- ✓ Long Service Life - proven technology for over 100 years
- ✓ Versatile Application - for various gas compositions
When Liquid Ring Pumps Instead of Rotary Vane Pumps?
| Criterion | Liquid Ring Pump | Rotary Vane Pump |
|---|---|---|
| Wet Gases | ✓ Ideally suited | ✗ Problematic (oil emulsion) |
| Dusty Gases | ✓ Very good (flushing) | ✗ Vane wear |
| Aggressive Gases | ✓ Possible with stainless steel | ○ Conditionally possible |
| Ultimate Vacuum | ○ 33 mbar (temperature dependent) | ✓ Down to 0.1 mbar |
| Maintenance | ✓ Very low maintenance | ○ Regular oil changes |
| Operating Costs | ○ Water consumption | ○ Oil consumption |
| Explosion Protection | ✓ Non-sparking | ○ ATEX version needed |
Main Application Areas:
- Chemical Industry: Distillation, drying, reactors, aggressive gases
- Pharmaceutical Industry: Tableting, drying, sterilization, filtration
- Food Industry: Vacuum drying, freeze-drying, degassing, concentration
- Plastics Processing: Extrusion, degassing, granulate drying
- Paper Industry: Dewatering, vacuum rolls, suction boxes
- Environmental Technology: Exhaust gas extraction, biogas applications, exhaust air cleaning
- Foundries: Molding, venting, dust extraction
- Mining: Degassing, dewatering, dust control
- Power Plants: Condensers, degassing, turbine vacuum
- Shipbuilding: Ballast water, leakage extraction, wastewater systems
- Medical Technology: Sterilization, suction in operating rooms
- Packaging: Vacuum packaging of food products
LR Series vs. TR Series - Which is Right?
| Property | LR Series (Cast Iron) | TR Series (Stainless Steel) |
|---|---|---|
| Material | Cast Iron | Stainless Steel AISI 316L |
| Price | ✓ Lower cost | ○ Higher investment |
| Corrosion Resistance | ○ Standard | ✓ Very high |
| Application | Standard industrial applications | Chemistry, pharma, aggressive media |
| Hygiene Requirements | ○ Standard | ✓ FDA-compliant possible |
Important Operating Parameters:
- Service Water: Clean, approx. 15°C for optimal vacuum
- Water Consumption: Approx. 20-30 liters per hour (depending on model)
- Water Circuit: Open (once-through) or closed (with cooler)
- Ambient Temperature: -10°C to +40°C
- Max. Operating Pressure: Atmospheric to slight overpressure
Available Designs:
- Standard Design: Horizontally mounted, direct coupled
- With Separator: Integrated gas-water separation
- Complete Systems: With heat exchanger and circulation pump
- ATEX Design: For hazardous areas
- Frequency Inverter Controlled: Energy-efficient adjustment to demand
Our Complete Service for Rietschle Liquid Ring Pumps:
- ✓ Sales: New pumps of LR and TR series in all sizes
- ✓ Consulting: Technical design and dimensioning for your application
- ✓ Spare Parts: Impellers, shafts, bearings, seals, housing parts in stock
- ✓ Wear Parts: Seals, O-rings, shaft seals
- ✓ Maintenance: Regular inspections and preventive maintenance
- ✓ Repair & Overhaul: Professional general overhaul
- ✓ On-Site Service: Installation, commissioning, troubleshooting
- ✓ Exchange Service: Minimal downtime through rental units
- ✓ System Integration: Complete vacuum systems with cooling and controls
Selection Guide - Important Questions:
- What volume flow is required? (m³/h at what pressure)
- What ultimate vacuum is needed? (mbar absolute)
- What medium is being conveyed? (air, gas, wet, dusty, aggressive)
- Operating mode: Continuous or intermittent?
- Water quality: What water quality is available?
- Water temperature: What temperature is the service water?
- Explosion protection: ATEX zone present?
Why Elmo Rietschle Liquid Ring Pumps?
- ✓ Over 100 years of experience in liquid ring technology
- ✓ Proven and robust construction
- ✓ Worldwide references in all industrial sectors
- ✓ Comprehensive product range
- ✓ Excellent price-performance ratio
- ✓ Spare parts availability over decades
- ✓ Worldwide service and support