…atures & benefits of the Mk5 series SMT convection reflow oven system New Cool Pipe Flux System Virtually Eliminates Maintenance Our new Cool Pipe flux collection system traps the flux in collection jars that can easily… …ly, our proprietary Flux-Free Grill System limits flux residue on the cooling grills – the result is not only reduced maintenance time, but recaptured production time – giving the Heller convection reflow oven system the…