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18B4B

Activair.cz > Products > Vacuum pumps and vacuum stations > Diffusion Pumps > Vapour Boosters > 18B4B
18B4B - Vapour Boosters

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.

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

Applications

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