Some food processes require that cooling towers are turned on and off with great frequency. Since metal expands and contracts depending on temperature, repeated cycling causes stress that can also accelerate corrosion, rust and leakage.
With so many inherent vulnerabilities, it is no wonder that metal-lined cooling towers generally carry only a one-year warranty.
On the other hand, engineered molded plastic cooling towers are one-piece, so there are no problems with seams, welds, and patches that wear prematurely. Competitive in price, engineered plastic cooling towers are also rust- and corrosion-proof.
Modular cooling towers also facilitate the use of an extra margin of cooling capacity that can be advantageous in adjusting to operational heat load or outflow changes, or in upgrading to meet future cooling requirements.