The major component of the Ljungström® air preheater is a continuously rotating cylinder, called the rotor, which is packed with thousands of square feet of specially formed sheets of heat transfer surface which are commonly called elements. The preheater structure consists of hot and cold end center sections, connected by two main pedestals on either end.The rotor is commonly supported on the cold end center section by a support bearing and maintained upright by a guide bearing located in the hot end center section.Sector sealing plates and axial seal plates are attached the center sections and main pedestals respectively to form separate gas and air passages through the heat exchanger. The rotor is enclosed by housing panels connected to the main pedestals to form the preheater casing, with the drive unit, cleaning device mechanism, and sealing surface adjusters all located externally to be readily accessible while the unit is in operation.  Upper and lower connecting plates are attached to the preheater casing to form a transition from the preheater rotor and casing shape to the clients ductwork connections. As the rotor revolves, waste heat is absorbed from the hot exhaust gas passing through one-half of the structure. This accumulated heat is released to the incoming air as the same surfaces pass through the other half of the structure. The heat transfer cycle is continuous as the surfaces are alternately exposed to the outgoing gas and incoming air streams. The advanced sealing system of the Ljungström® air preheater is a result of an evolution of devices and methods to develop a sealing system that is capable of successfully controlling and minimizing air-to-gas leakage. The design takes advantage of normal thermal growths to achieve effective sealing with a minimum of maintenance requirements.The integrated sealing system comprises of proximity seals and stationary sealing surfaces arranged to inhibit leakage from the air side of the air preheater to the gas side. › Locate a Salesperson