True Leadership and Experience With several years’ experience in vacuum reflow, Heller Industries is recognized as the world leader in vacuum reflow technology. …Vacuum Reflow Oven 11 Convection zones + 3 IR zones + 3 Cool Zones, Total Length 590cm 1936MK5-VR Vacuum Voidless Oven 8 Convection Zones + 3 IR Zones + 3 Cool Zones, Total…