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Edwards E2M28 21 CFM Dual-Stage High Capacity Vacuum Pump

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Edwards E2M28 21 CFM Dual-Stage High Capacity Vacuum Pump
Brand: Best Value Vacs/Closed Loop/Rotary
Product Code: Edwards E2M28 21 CFM Dual-Stage High Capacity Vacuum Pump
SKU: 94-853-1942
Availability: In Stock

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Edwards E2M28 21 CFM Dual-Stage High Capacity Vacuum Pump

Edwards E2M28 21 CFM Dual-Stage High Capacity Vacuum Pump

***Note: This Item will ship by Freight ONLY***

Edwards E2M28 21 CFM Dual-Stage High Capacity Vacuum Pump. The EM range of oil-sealed rotary pumps - renowned for its high ultimate vacuum, rapid pumping speed, quiet operation and ability to handle vapour - has become the industry standard laboratory and light industrial applications. 
The E2M28 pump is a two-stage, direct drive, sliding vane pump. The pump is oil sealed and designed for reliable, long-term operation in both laboratory and industrial environments. The pump is a freestanding unit with the drive provided through a flexible coupling by either a single-phase or three-phase (four-pole) motor. 

-Purchase Price Includes Oil Mist Filter 


  • The pump is designed for reliable, long-term operation.
  • Thermal overload device prevents overheating (single phase only).
  • The pump is a free-standing unit.
  • The drive is provided through a flexible coupling by a single-phase or three-phase (four pole) motor.
  • The motors are totally enclosed and are cooled by the motor-cooling fan.
  • Easy to use controls.
  • Pressure die cast oil box with integral oil seals prevents oil leaks.
  • Gas ballast valve for large water vapour handling capacity.
  • Externally approved to EN61010, CSA, C22.2 and UL61010.
  • Oil distribution valve.
  • Pumping chambers are air-tight.
  • Oil sight-glass, two oil drain-plugs, inlet-port and outlet nozzle all fitted as standard.
  • Gas-ballast control.
Displacement (swept volume):  
50 Hz: 32.2 m3h-1 / 19 ft3min-1
60 Hz: 38.9 m3h-1 / 22.3 ft3min-1
Speed (Pneurop 6602):  
50 Hz: 27.5 m3h-1 / 16.2 ft3min-1
60Hz: 33.0 m3h-1 / 19.5 ft3min-1
Ultimate vacuum (total pressure):  
without gas ballast: 1 x 10-3 mbar / 7.5 x 10-4 Torr
with gas ballast: 1.5 x 10-2 mbar / 1.1 x 10-2 Torr
with Fomblin®: 1 x 10-2 mbar / 7.5 x 10-3 Torr
Inlet connection: NW25 flange
Outlet connection**: Nozzle 15 mm external Ø removable from 3/4 in BSP tapped hole
Max allowed pressure at outlet: 0.5 bar gauge / 7 psig
Max inlet pressure for water vapour: 30 mbar / 23 Torr
Max water vapour pumping rate: 0.7 kg h-1
Operating temperature range: 13 – 40 °C
Nominal rotation speed: 1440 / 1720 rpm
Motor power 50 Hz: 0.75 kW
Motor power 60 Hz: 0.90 kW
Power Connector 1-ph*: IEC EN60320 C19
Weight: 44 kg / 97 lbs
Noise: 57 dB(A) @ 50 Hz
Oil capacity - max: 1.5 litre
Oil capacity - min: 1.2 litre
Recommended oil (supplied): Ultragrade 19


Pump Warranty Information

• Customers using solvents such as stabilization resins (MinWax™, Gator Venom™ etc.), alcohol and other polar solvents must use the vacuum pumps in conjunction with a cold trap for evacuations in excess of 5 minutes. (Excludes Cactus Juice™)
• If the consumer is using the pump for prolonged periods of time exceeding 5 minutes we require that a cold trap is used or the pump warranty is void.
• These stabilization resins have the ability to break down the internal components of the pump that are plastic resulting in a seized motor voiding all warranties. 
• When evacuation exceeds 5 minutes these solvents begin to vaporize and then re-condense in the vacuum pump reservoir. Once enough solvent re-condenses in the pump displacing the oil the plastic internal components may begin to warp, melt or seize. The use of a cold trap will condense the vapors prior to making their way to the vacuum pump preventing pump damage due to excessive use. Furthermore, Minwax Wood Hardener™ is not to be used with any vacuum pumps, EVER. (A seized motor will result within the first use.)
• To prevent these issues from happening to your process, change the Oil after each vacuum pump use, Even if the use time is only 5min.

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