... ,vacuum packing,paper making,aquaculture,sewage treatment,pneumatic conveying,etc2.Three lobes roots blower major specifications Bore:50-200mm Air Capacity ... compact unit include Common Base ,V-belt cover,Blower Pulley,Motor Pulley,V-belt,Inlet Silencer(with air filter),Safety Valve,Pressure ... Oil,Anchor Bolt,flexible joint,non return valve.4.Contact three lobes roots type blower(manufacture)