Plant specifically designed for the production of rigid polyurethane foam blocks and PIR. The plant can be supplied with a minimum of 2 dosing lines up-to 12 for self-formulating with basic components, catalysts and blowing agent, plus filler dosing line (i.e. graphite, melamine, calcium carbonate etc), plus colors lines. Furthermore pentane can be used as blowing agent. Tec Mac was the first machinery producer in the world in designing a block plant using pentane as blowing agent, and many of such units are running worldwide. The plant can produce fully squared –no dome shape- thanks to our special squared system.