622 5H25

Stokes 6" series process isolation boosters are designed to be used in conjunction with rotary-piston, dry vacuum, rotary vane and liquid ring pumps to increase pumping speed at working pressures and shorten pump down time significantly. They incorporate five mechanical seals for optimum protection from dust and particulate contamination and 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 Stokes 6” series has the capability for use with higher powered motors in addition to ensuring a uniquely rugged and durable mechanical booster.
The Stokes 6" series 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

Features and Benefits

  •     Mechanical shaft seal – improved life and serviceability
  •     Ringfeder® keyless gear locking system – stronger, faster timing
  •     Large shaft diameters – allowing improved performance at high pressures
  •     Belt drive or direct drive capability
  •     Vertical or horizontal gas flow 
  •     Drive end roller bearing – resists belt pull and thermal effects
  •     Over-sized anti-friction bearings – increased uptime and longer service intervals
  •     Rugged proven design and construction
  •     Quiet operation
  •     Unique impeller design -Dynamically balanced to minimize vibration
  •     High volumetric efficiency
  •     High differential pressure – operation capability
  •     Available by-pass option for improved pumpdown
  •     Available process isolation seal option – optimum protection from dust and particulate contamination


  •     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
Dane techniczne
  V belt (2750 rpm) 5100m3h-1 / 3000ft3min-1
  Direct drive (3000 rpm) 5525m3h-1 / 2350ft3min-1
  Direct drive (3600 rpm) 6630m3h-1 / 3900ft3min-1
Inlet/outlet flanges 8” ASA/ANSI flange
Motor power EU/Asia 18.5kW
Motor power US TEFC 25hp
Cooling water 7.6-11.4 lmin-1 / 2-3 gal min-1
Oil capacity (horizontal flow) 1.9 litre / 4.1gal
Oil capacity (vertical flow) 4.1 litre / 8.8gal
Max pressure differential 333mbar / 250Torr
Max temp rise 121°C / 250°F
Max discharge temp 177°C / 350°F
Weight bare shaft 335kg / 740lbs
Weight TEFC direct drive 625kg / 1370lbs
Recommended Oil  V- Lube H
Pliki do pobrania
6 Inch MSeal Booster Pumps and Process Isolation Booster Pumps Instruction Manual