The XDS pumps are used as a patented bearing shield to isolate the vacuum environment from all forms of lubricant, not only making it totally dry, but hermetically sealed. The shield also protects the bearing from any process vapours. Adjustable gas ballast allows vapour to be handled and opens up the range of applications to many that were previously unsuited to scroll pumps. The XDS-C range are designed for pumping condensable vapors and use materials selected for a wide range of laboratory wet chemistry applications.

They use intermeshing fixed and orbital scrolls to form non-contacting, crescent shaped gas pockets that are continuously compressed by the orbiting action. This means that, unlike oil-sealed rotary pumps, there is no sealant or lubricant required in the swept volume of the pump. On the C-model (corrosion resistant) pumps, the turbine parts are protected from corrosion by a special coating. The pump may be further protected by purging with an inert gas, this will protect the bearings and motor from chemical corrosion.

Applications include analytical instruments, automotive, beam lines and high energy physics, centrifuges, ultra-high speed, coating, cryogenics, degassing/curing-oil, epoxy resin, distillation/extraction/filtration, freeze drying, furnaces, gel drying, laboratory bench top vacuum, lasers, gas recovery and re-circulation, leak detectors, helium, load locks and transfer chambers, rare gas re-circulation, rare gas recovery, refrigeration manufacture, research and development, rotary, centrifugal evaporators, scanning electron microscopes, SEM/FIB (ion beam repair), solvent recovery, surface science instruments and turbomolecular backing pumps.