... ,petroleum,steel industry,smelling,food,oxygen making,spinning,vacuum packing,paper making,aquaculture,sewage treatment,pneumatic conveying, ... Common Base ,V-belt cover,Blower Pulley,Motor Pulley,V-belt,Inlet Silencer(with air filter),Safety Valve,Pressure Gauge ... ,Lubricating Oil,Anchor Bolt,flexible joint,non return valve.4.Contact: three lobes rotary vacuum ...