Twin/Tri lobe blowers are used in water /Sewage /Effluent Treatment plant and Aquaculture, Pharma Industry for aeration/Oxidation purpose. They are also used in Pneumatic conveying system and Vacuum generation applications.They offer unique advantage of oil free air supply. Material of Construction- Casing - CI, SS304, SS316 Rotors - SG iron,CI, SS304, SS316 Sometimes rotors and internal wetted parts are given special treatment /coating like chrome plating, Galvanizing, Teflon Coating etc. to avoid corrosion effect. While ordering /selecting following points needs to be considered- Application- For which process /plant the blower is used? Water treatment/Aquaculture/Pneumatic conveying/Gas Conveying/Pharma Oxidation etc. Capacity- Air flow requirement in m3/hr OR CFM. Pressure/Vacuum – Required pressure or Vacuum in mbar OR MMWC. Site details- Altitude,Max./Min. Temp. ,Humidity etc.