... gas transportation, waste water treatment, sewage treatment, air purifying, aquaculture, pneumatic transport, vacuum packing, ... combustion-supporting, pressure charging, foundry, mine, metallurgy, light industry, building materials, electric power, ... 55-315kw Standard AccessoriesSuction Silencer (With Air Filter)Discharge silencerAnchor BoltReverse ValveFlexible JointSafety ...