PVD Vacuum coating machine manufacture, Oil Diffusion Pump Oil Diffusion Pump Main pump: used in a vacuum system to get the required vacuum; Roughing vacuum pump: lowering the pressure of the system from atmospheric pressure to a vacuum in which another pumping system begins to operate; Backing vacuum pump: used to maintain the front stage pressure of another pump below its critical front stage pressure; Holding vacuum pump: when the gas to be pumped is of small quantity, holding vacuum pump is used to maintain the vacuum pressure instead of operating the backing pumps; Rough/Low vacuum pump: vacuum pump starting from atmospheric pressure and used to obtain low vacuum; High vacuum pump: vacuum pump working in high vacuum conditions; Ultrahigh vacuum pump: vacuum pump working in ultra-high vacuum conditions; Booster vacuum pump: installed between a low vacuum pump and a high vacuum pump to improve the system efficiency or reduce the capacity requirements of the front stage pump; contect 1/3448A, Street. No. 5, Ramnagar, Mandoli Road, Shahdara - 110032, North East, -110032, New Delhi +91 9818085534 +91 9315743673 http://www.vaccumpumpmanufacturer.com salesvacuum1@gmail.com . For more info visit us at http://www.vaccumpumpmanufacturer.com