9006225vr601 - 622 5VR CE 18.5kW, 230/400V, 3-ph, 50Hz @ 3000rpm

622 5VR CE 18.5kW, 230/400V, 3-ph, 50Hz @ 3000rpm



Edwards Process Isolation Boosters are designed to be used in conjunction with rotary-piston, liquid ring, rotary vane and dry vacuum pumps to increase pumping speed at working pressures and shorten pump down time significantly. The Process Isolation Boosters can be mounted separately or on the inlet of the backing pump to create a compact integrated package.

Featuring an extra large diameter shaft, the 6” Process Isolation Boosters has the capability for use with higher powered motors in addition to ensuring a uniquely rugged and durable mechanical booster. This allows the pumps to operate at their full displacement from atmospheric pressure with an appropriately sized backing pump.

In addition to these standard features, the Process Isolation Boosters have 5 mechanical shaft seals for optimum protection from dust and particulate contamination in arduous duty applications.

The Process Isolation Boosters must be backed by a primary vacuum pump designed to discharge to atmospheric pressure. Examples of suitable backing pumps are listed below:

GV Drystar or Chemical Drystar dry pumps
Two stage LR series liquid ring pumps
RV, EM or EVC oil sealed pumps
Microvac series piston pumps


  • Automotive
  • Chemical processing
  • Heat treatment
  • Leak detection
  • Metallurgy
  • PET processing
  • Pharmaceuticals
  • Thermal processing
  • Transformer drying and cable fluid conditioning
  • Vacuum coating
  • Vacuum melting
  • Many other industrial applications

Features and Benefits

  • 5 Mechanical shaft seals offer improved life and serviceability and prevent contamination from dust and particulates
  • Ringfeder® keyless gear locking system provides stronger, faster timing
  • Drive end roller bearing which resists belt pull and thermal effects
  • Over-sized anti-friction bearings allows increased uptime and longer service intervals
  • Vertical gas flow configuration
  • Belt drive or Direct drive capability
  • Rugged proven design and construction
  • Large shaft diameters allowing improved performance at high pressures
  • Quiet operation
  • Unique impeller design which is dynamically balanced to minimize vibration
  • High volumetric efficiency
  • High differential pressure offering operation capability

Technical Data

Horizontal flow Vertical flow
Displacement V belt (2750 rpm) 5100m3h-1 / 3000ft3min-1 5100m3h-1 / 3000ft3min-1
Displacement direct drive (3600 rpm) 6630m3h-1 / 3900ft3min-1 6630m3h-1 / 3900ft3min-1
Inlet/outlet flanges 8” ASA/ANSI flange 8” ASA/ANSI flange
Motor option US TEFC 25hp 25hp
Cooling water 7.6-11.4l min-1 / 2-3gal min-1 7.6-11.4l min-1 / 2-3gal min-1
Oil capacity 1.9liter / 4.1gal 4.1liter / 8.8gal
Max pressure differential 333mbar / 250Torr 333mbar / 250Torr
Max temp rise 121°C / 250°F 121°C / 250°F
Max discharge temp 177°C / 350°F 177°C / 350°F
Foot print TEFC direct drive (L x W x H) 1613 x 438 x 543mm / 63.5 x 17.3 x 21.4in 1613 x 543 x 438mm / 63.5 x 21.4 x 17.3in
Weight TEFC direct drive 625kg / 1370lbs 625kg / 1370lbs

Dimensions 2

A 8" pipe flange connection 13 1/2" (343 mm) OD x  8” (203 mm) ID 8 x 3/4-10 NC-2B x 1 1/8" (29 mm) holes straddle both CL both flanges
419-699-001 - 19 litres (5 US gal)

19 litres (5 US gal)

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424-051-001 - 3.8 litres (1 US gal)

3.8 litres (1 US gal)

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kit001378 - KIT STOKES 6 INCH – 1YR  SERVICE


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419-698-001 - 208 litres (55 US gal)

208 litres (55 US gal)

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