Large horizontal-flow Ljungström® air preheaters with rotors measuring 22.5 feet in diameter or larger are supplied with full sector heat transfer surface containers for all layers.  Unlike the shop-assembled modular design for vertical flow, these heat transfer surface containers are lowered into the sector shaped compartments formed by the diaphragms of the field-assembled rotor.  Smaller horizontal-flow air preheaters are supplied with multiple containers for each layer. Designed for either vertical or horizontal flows, the industrial Ljungström® air preheater is available in a full range of sizes for gas flows of 20,000 to 780,000 lb./hr. The package Ljungström® air preheater is completely factory-assembled.  The "S" and "R" series Ljungström® air preheaters are similar to the standard package unit, but are too large to ship completely assembled.  Major components are prefabricated to minimize field assembly. A full sector heat transfer surface container is lowered into the rotor of this large horizontal flow Ljungström® air preheater, measuring approximately 60 feet in diameter. › Locate a Salesperson