Edwards E2M28 / Atlas Copco GVD-28 Dual Stage Vacuum Pump 115V/200-230V 50/60Hz NEW

Technology

The motor is totally enclosed and is cooled by the motor-cooling fan which directs air along the motor fins. The motors are fitted with a thermal overload device. When the motor is too hot, the thermal overload device switches off the pump. The thermal overload device has an automatic reset; when the motor cools down, the device resets and the motor will restart.

An oil pressure system lubricates the pump shaft bearing surfaces and rotor sealing faces. The pump has an oil distribution valve which prevents discharge of oil to the pump interior (suckback) after the pump stops. The pumping chambers are air-tight, so this arrangement prevents oil suckback unless the gas ballast valve is open.

You can inspect the level and condition of oil in the oil box reservoir through the oil sight-glass. An oil filler-plug is fitted to the top of the oil box. The pump has two oil drain-plugs to allow either gravity oil drain or pressure oil drain.

Features and Benefits

• 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

Applications

• Analytical instruments - LCMS
• Automotive
• Beam lines and high energy physics
• Centrifuges, ultra-high speed
• Coating
• Cryogenics
• Degassing/curing - oil, epoxy resin
• Distillation/extraction/filtration
• Freeze drying
• Furnaces
• Gas bottle filling/emptying
• Gel drying
• Glove boxes, ovens
• Laboratory bench top vacuum
• Lasers, gas recovery and re-circulation
• Leak detectors, Helium
• Load locks and transfer chambers
• Refrigeration manufacture
• Rotary, centrifugal evaporators
• Solvent recovery
• Surface science instruments
• Turbomolecular backing pumps

Technical Data

• Displacement (swept volume)
  • 50 Hz: 32.2 m³h-1 / 19 ft³ min-1
  • 60 Hz: 38.9 m³h-1 / 22.3 ft³ min-1
• Speed (Pneurop 6602)
  • 50 Hz: 27.5 m³h -1 / 16.2 ft³ min-1
  • 60 Hz: 33.0 m³h -1 / 19.5 ft³ min-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: 1340° C – 40° C
• Nominal rotation speed: 1440 / 1720 rpm
• Motor power
  • 50 Hz: 0.75 kW
  • 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
  • Maximum: 1.5 litre
  • Minimum: 1.2 litre
• Recommended oil (supplied): Ultragrade 19

* The PFPE are supplied with NW25 outlet connection
** Pumps listed with IEC connector only