Heatec Thermo-Guard^® Storage Tanks

An option to Heatec Thermo-Guard Tanks is the dish bottom version. They may look like ordinary tanks on the surface but they have key differences that make them less expensive to maintain and they produce better quality product. The design virtually eliminates the need for expensive and time consuming tank cleaning. It also has better agitation and heat distribution than an ordinary tank. They are especially beneficial for storing modified asphalts.

The amount of insulation used on Astec vertical tanks sets them apart from the competition. More insulation means less heat loss. We fully insulate all tank surfaces. The top bulkhead has a double-wall that encloses 6 inches of fiberglass insulation. Outer surfaces of the side walls also have 6 inches of fiberglass insulation. Unlike other manufacturers, we insulate the tank bottom as a standard feature. Its inner surface has 3-inch foam glass insulation with a metal cover to protect the insulation. This feature alone results in a significant reduction in heat loss.

Thermo-Guard tanks provide a better mixing, heating and storage solution for PMAC (Polymer Modified Asphalt Cement) than competitive tanks. To achieve proper blending of PMAC, the virgin asphalt is heated to temperatures higher than normal. So, insulation is more important than ever. And design of the mixing system is just as important. Our mixing system keeps the polymers in suspension to prevent them from separating from the virgin asphalt. The number, size, pitch, location and rotational speed of the impeller blades are key factors in maintaining mixture consistency. Moreover, the baffle and piping are carefully arranged to keep material from hugging the tank wall and to minimize stagnation zones.