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.
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 |