Constant Heat Sealers are machines that stay consistently hot in order to produce the seal on a package. Accessories and parts for constant heat sealers are available at Technopack Corporation. Whether you have a pedal controlled constant heat foot sealer for packaging liquids, powders or heavy bags that are difficult to lift; a bench sealer; upper jaw constant heat sealer; or vertical constant heat sealer, there is a full inventory of heat sealer parts in stock. Get replacement parts for MFS-300-C, MFS-400-C and more. Heater tubes, thermocouples, and temperature controllers for constant heat sealers are available. Heater tube transfer heat to the brass plates to seal the bag. Thermocouples consisting of two dissimilar conductors forming electrical junctions at differing temperatures are compatible with JORESTECH® Foot Impulse Sealer models.