... fan 5.stable performance, high efficiency 1. Low noise, due to the helical suction and discharge, the blower air ... in gas transportation, waste water treatment, sewage treatment, air purifying, aquaculture, pneumatic transport, vacuum packing, combustion ... 0.55-315kw Standard AccessoriesSuction Silencer (With Air Filter)Discharge silencerAnchor BoltReverse ValveFlexible JointSafety ValvePressure ...