Kasera Heat Transfer Pvt. Ltd. Air Cooled Heat Exchangers for use in oil refineries, petrochemical plants, power generating stations, and fertilizer and gas production plants throughout the world. Header of Air Cooled Heat Exchangers Kasera Heat Transfer Pvt. Ltd. Plug & Cover Plate Header Air Coolers and Heat Exchangers for use in oil refineries, petrochemical plants, power generating stations, and fertilizer and gas production plants throughout the world.