... weight,and compact structure.Air cooling structure,pressure rise 98Kpa,no need of water cooling.Special designed casing ensures ... Optional accessories:motor,electric starter,accousic enclosure.2.roots blower PerformanceBlower: Vacuum Pump:Pressure rise:9.8~98Kpa Vacuum ... 167kw Shaft power:1~107kw3.Order information:Standard accessories:blower,inlet silencer with filter,outler silencer,pully,belts, ...