Roots vacuum pumpNSR type roots vacuum pump has been developed from the most successful roots blowers & positive displacement blowers. Our pumps are excellent quality and good service for our customers all over the world.Roots vacuum pump technical data:The vacuum pressure from V 9.8kpa to V49kpa.Air flow from 1.22m3/min ~60m3/minBore size:40mm~200mmOur pump is compatible with all types of backing pumpHorizontal or vertical flow220V~480V,Website:http://www.chinapdblower.com,50Hz or 60Hz operationCompact design and sable performanceLow noise & No oil leakageApplications:Vacuum packaging Paper issue industryDrying metal castingSolvent RecoveryFood and packing industry