HOTFOIL Specializing in electric surface heating systems for fly ash hoppers on electrostatic precipitators or baghouses, coal and material handling systems, tanks, pipes, etc. in all types of industry. Engineering capabilities to design any type of heating system that your company or client might require. Each and every inquiry and contract is given personal attention no matter the size or value. Attention always given to individual and collective needs. Clients are highly valued and the confidence built over the years will always be maintained. EHS Equipment Power consoles, temperature recorders, ceramic mat heaters, etc. Complete support and training services are offered on all equipment. Design and manufacture proven systems that effectively and efficiently complete project tasks. AFTEK is the sole remaining manufacturer of resistor controlled welding machines in the USA. In 1977, Big 4 Manufacturing introduced their innovative Series 77 Control, and the features introduced then remain at the heart of the AFTEK design: Edge-wound coils for better heat dissipation (thus better current control) and rotary switches for current selection. Previous designs had used round Ni-Chrome wire and knife switches which could not be switched under load. AFTEK Big Four grids have been used to build nuclear power plants, to build and repair US Navy ships, for piping and vessels and with the exclusive Demand Pulse MIG, the thinnest sheet metal for food handling equipment, computer cases, aluminum boats.