Overview
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.
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 @ 25 ⁰ C/1.6 US gal min-1 @25 ⁰ C |
| Water block threaded hole | ½ inch BSP |
| Weight | 165 kg / 365 lbs |
US 19530 
GB 14732 
CA 11914 
AU 9068 
IE 5890 
BR 2396 
NZ 2338 
SG 859 
