diffusion1 vacuumVapour/vapor diffusion pumps come in a wide range of pumping speeds from 60 litres/second up to 12500 litres/second, so they can be used in a number of different applications. All of these systems are usually dirty applications, vacuum furnaces, mass spectrometers, optical coating etc. All of these applications depend on the same thing to ensure fast, clean pumping, and clean and correct silicon oil levels.

Over a period of about a year, the operation of the system and the gases being pumped slowly contaminates the oil causing the pumping speed to decrease and generate more back steaming of the silicon oil reducing the oil level. Carbon deposits build up and the vapour pressure of the oil declines. Vapour Diffusion pumps must be inspected and cleaned at least once every 12 months to ensure fast pumping speeds and a longer pump life, resulting in greater production over the life of the pump.

Small Vapour Diffusion Pumps

diffstak-vp (1) vacuumDiffstak Vapour Diffusion Pumps

The compact Edwards Diffstak vapour diffusion pumps are water-cooled pumps with built-in cooled baffles which afford substantially clean pumping. The proven Edwards design guarantees very low back-streaming, lessened outgassing and low sealing requirements. These diffusion pumps are offered with either built-in manual or pneumatic high vacuum valves.

cc-diffstak-vp vacuumCryo-Cooled Diffstak Vapour Diffusion Pumps

The compact Edwards Cryo Cooled Diffstak vapour diffusion pumps are cryo-cooled diffusion pumps with baffles cooled by liquid nitrogen which provide clean pumping of heavy vapour loads. The proven Edwards design guarantees very low backstreaming, lessened outgassing and low sealing requirements. These diffusion pumps are offered with built-in manual or pneumatic high vacuum valves.

eo-vp vacuumEO Series Vapour Diffusion Pumps

The compact Edwards EO range of vapour diffusion pumps are a low cost system with fast warm up times making them highly suitable for scientific and R&D applications. These vapour diffusion pumps are a portable, bench top pump with motors which are either air or water cooled.

Large Vapour Diffusion Pumps

ht-vp vacuumHigh Throughput Vapour Diffusion Pumps

The Edwards HT and EO vapour diffusion pumps offer the highest throughput of any comparable sized pump, making them highly suitable for industrial processes that involve very large amounts of gases. These vapour pumps are ideal for processes which have high critical backing pressure, and the pump minimizes back-streaming using integrated baffles.

booster-vp vacuumVapour Booster Pumps

The Edwards range of vapour booster pumps are specifically designed to provide high pumping speeds at intermediate pressures between mechanical boosters and vapour diffusion pumps. The inherently reliable vapour booster pump range are easy to use, easy to keep maintained and are tolerant to a broad range of inlet and exhaust pressures. These basic constituents make them highly suitable for many industrial applications.