... electricity,petroleum,steel industry,smelling,food,oxygen making,spinning,vacuum packing,paper making,aquaculture,sewage treatment,pneumatic conveying,etc2 ... 9.8-78.5Kpa Motor Power:0.75-300kw Rotary speed:740-2130rpm3.Free charge Standard Accessories all the ... air filter),Safety Valve,Pressure Gauge,Lubricating Oil,Anchor Bolt,flexible joint,non return valve.4.Contact: three lobes rotary vacuum ...