COMPLETELY DRY, LUBRICANT-FREE VACUUM PUMP WITH VAPOR HANDLING Innovative XDS Dry Pumps were designed by Edwards® (formerly BOC Edwards) to provide vacuum totally free of lubricants. Bearings are isolated from the vacuum environment by a patented XDS bearing shield. Uniquely, there are no bearings, grease or oil under vacuum and no bearing purge. Controllable gas ballast is standard and makes the XDS suitable for pumping condensable vapors.The versatile XDS uses a scroll mechanism and is manufactured by Edwards® , the market leader in dry pumping products and technology. This pump is portable, aircooled and cost effective. Power consumption is very low and, typically, no other utilities are required. XDS vibration and noise levels make it ideal for laboratory use. The XDS is truly user serviceable; with no oil to change, annual maintenance can typically be completed in about 10 minutes without special tools.