The Edwards 18B4B vapour booster pumps offer higher pumping speeds, of up to 6000 l s-1 at pressures intermediate between mechanical boosters and diffusion pumps. Vapour boosters from Edwards have been proven in the field for over 30 years. With a constant program of updates and modernisation, with input from OEM’s and end users, combined with inherent reliability, ease of use and tolerance to various inlet and exhaust pressures they have been used extensively in metallurgy and coating industries as well as other specialist applications.


Features and Benefits

  •     Very large pumping speed at high operating pressures
  •     Very high throughput at operating pressures
  •     Quick crossover for excellent pump down times
  •     Industry proven for over 40 years
  •     Excellent reliability
  •     Can replace Stokes 16" ring jet booster
  •     Boiler port for ease of cleaning


  •     Vacuum metallurgy
  •     Distillation, drying and degassing
  •     Thin film coating and metallizing
  •     Large-scale research


Dane techniczne
Pumping speed  
air 4000 ls-1
hydrogen 6000 ls-1
Maximum throughput 100 mbar ls-1 /
  75 Torr ls-1
Critical backing pressure 2-2.6 mbar /
(with AP201 fluid) 1.5-2 Torr
Recommended backing pump displacement 190 m3h-1 /
  112 ft3min-1
Recommended backing pump GXS450, E2M275
Recommended fluid Apiezon® AP201
Fluid charge 10 litre / 9.5 qt
Inlet connection 8x11mm holes on 387.4 PCD (Edwards) /
  ANSI 12 inch / ISO320
Backing connection 2 inch union (Edwards) /
  ANSI 4 inch / ISO160
Water connection -
Heater power 6.0 kW / 8 hp
Warming up time for full performance at  
maximum heater input 60 min
Minimum water flow inlet 375 l h-1 @ 20oC / 1.8 US gal min-1 @ 20oC
Water block threaded hole ½ inch BSP
Weight 165 kg / 365 lbs
Pliki do pobrania
18B4B Vapour Booster Pumps Instruction Manual