... electricity,petroleum,steel industry,smelling,food,oxygen making,spinning,vacuum packing,paper making,aquaculture,sewage treatment,pneumatic conveying,etc2.Three lobes roots ... ³/minPressure: 9.8-78.5Kpa Motor Power:0.75-300kw Rotary speed:740-2130rpm3.Free charge Standard Accessories all the blower ... Bolt,flexible joint,non return valve.Contact three lobes roots type pneumatic conveying blower