Profile: Thermo Tech Engineering designs and manufactures waste heat recovery systems & industrial utility equipments. Plate and frame heat exchanger is an efficient heat transfer device. A gasket is placed between the plates which seals the fluid and directs the flow. The end frames and heavy threaded rods compress the plate pack to create heat transfer device. The fluid flows through ports located on the frames. The location of these ports is dependent on the particular flow characteristics required by the heat transfer application. Air separators are used for effective elimination of air from the system. The action of centrifugal forces causes heavier bubble free water to move to the outside, while the lighter air entrained water moves into the low velocity center.