The Model OCT-3(4) OCTPANDER was developed to provide a happy medium for producers of the larger commercial and industrial-type coils. It is a further development of the expansion principle employed by the TRIDAN FLEXPANDER. The OCTPANDER will provide the same quality of product output, while increasing the
productive output by four to five times that of the FLEXPANDER.
The OCTPANDER provides manufacturer's of large heat transfer coils a lower cost and efficient means of expanding their coils. While large multi-rod horizontal expander can expand large coils in one cycle, they involve both a larger capital investment and costly time-consuming setup procedures. Other tube expansion methods, such as hydrostatic and hydropropulsive expansion, although adequate for some coil manufacturers, have
disadvantages. Problems such as inconsistent tube-to-fin bond, ruptured tubes, and the extra cost for secondary
cleaning and/or drying of the coil tube interiors tend to limit their use.