High speed, high capacity, dry vacuum pump for chemical applications

Paul Boughton

The CDX1000 dry vacuum pump from BOC Edwards is suitable for high speed, high capacity process applications, and features third generation double-ended screw technology for reliable operation and low cost of ownership.

With a nominal pumping speed of 900m3/hr, the CDX1000 is suitable for use in chemical, pharmaceutical, metallurgy and other industrial applications. In many situations it can be used in place of two or more dry pumps for a cost-effective solution.

BOC Edwards’ third generation screw technology employed in the CDX range features a pair of variable pitch rotors machined to exacting tolerances with no need for coatings or a compression plate at the exhaust. The double-ended design removes the issue of axial forces on bearings giving increased bearing life. This is a problem with traditional screw designs, particularly when handling liquid slugs or viscous oils and tars. Variable pitch geometry provides staged compression along the length of the screw resulting in lower running temperatures and lower process power consumption.

CDX1000 has no lubricants under vacuum. This means there is no process contamination and a reduced environmental impact, as regular replacement of contaminated oil is not required. The bearing and gearbox lubrication system is cooled and filtered with easily accessible ‘spin-on’ filters, further reducing the cost of ownership.
BOC Edwards is based in Crawley, West Sussex, UK. www.boc.com