The Edwards E2M28 is a two-stage oil-sealed rotary vane vacuum pump engineered for laboratory and industrial vacuum applications requiring high pumping performance, excellent ultimate vacuum, and long-term operational reliability. Its two-stage compression design provides significantly lower ultimate pressure than single-stage pumps, making it an ideal backing pump for turbomolecular pumps as well as a reliable standalone vacuum source.
Key Features
- Two-stage oil-sealed rotary vane vacuum pump
- High pumping speed with excellent ultimate vacuum
- Ideal backing pump for turbomolecular pumps
- Rugged industrial construction
- Advanced lubrication circuit
- Gas ballast valve for improved water vapor handling
- Forced-air cooling
- Low operating noise
- Oil level and condition sight glass
- Wide-voltage motor
- Integrated IEC electrical connector
- Simple maintenance
- Designed for continuous-duty operation
- Proven long-term reliability
Technical Specifications
Pump Type
- Oil-sealed rotary vane vacuum pump
- Two-stage compression
Performance
- Pumping speed (50 Hz): 27.5 m³/h
- Pumping speed (60 Hz): 33.0 m³/h
Ultimate Vacuum
- Ultimate pressure: 0.1 Pa
- Ultimate pressure with gas ballast: 1.5 Pa
Water Vapor Handling
- Gas ballast valve
- Maximum water vapor pressure: 3000 Pa
Motor
- Rated power (50 Hz): 750 W
- Rated power (60 Hz): 900 W
- Wide-voltage motor
Connections
- Inlet: DN 25 ISO-KF (NW25)
- Outlet: 15 mm hose nozzle
Operating Conditions
- Maximum altitude: 2000 m
Construction
- High-grade cast iron rotor
- High-grade cast iron stator
- Oil capacity: 1.2–1.5 L
Dimensions and Weight
- Dimensions: 626 × 180 × 262 mm
- Weight: 44 kg
Noise Level
- 57 dB(A)
Typical Applications
- Turbomolecular pump backing
- Mass spectrometry
- Electron microscopy
- Vacuum furnaces
- Vacuum drying
- Pharmaceutical manufacturing
- Chemical processing
- Food industry
- Research laboratories
- Industrial vacuum systems
