Vapour booster pumps operate in a similar way to vapour diffusion pumps but generate boiler pressures approximately ten times higher than is typical for a vapour diffusion pump. The high boiler pressure feed supplies powerful ejector nozzles, that are specifically designed to increase further the throughput of the pump. The ultimate pressure of these pumps is typically in the range 10-4 to 10-5 mbar, above which the pumps exhibit considerable pumping speed for permanent gases. Additionally, they are tolerant to high backing pressures.
Vapour boosters are typically used in the 10-1 to 10-4 mbar range where primary pump combinations are often at their limit and ordinary diffusion pumps exhibit instability. Edwards booster pumps are particularly tolerant to pumping contaminated systems and processes with high gas loads of hydrogen, hence their suitability for use in metallurgical and chemical process applications.
By combining Edwards vapour booster pumps with either our GV series dry pump combinations or our oil-sealed rotary pump combinations fast pump-down and process times are achievable. Our applications specialists are able to recommend suitable pump combinations to meet specific process requirements.
|
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
|
Vacuum metallurgy Distillation, drying and degassing Thin film coating and metallizing Large-scale research |
|
The Edwards 30B5M vapour booster pumps offer higher pumping speeds, of up to 15000 ls-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.
|
Highest throughput of comparative sized pumps Earliest crossover pressure of similar sized pumps Excellent maximum backing line pressure and tolerance to gas surges Comparative pumping speed to similar sized pumps Integral cold cap for best performance and low backstreaming |
Click the download button to know more info..Download