Harper is the world leader for Ultra High Temperature furnace (UHT) systems rated to 3000°C for use in the production of many powdered metals and high modulus carbon fiber, primarily used in applications requiring high rigidity.
Harper makes use of innovative design techniques to navigate the difficulties of developing a system that must operate at such high temperatures for extended periods of time. Most materials used in the construction of a furnace, such as the heating elements and insulation, will be consumed as part of the reaction with exposure to such high temperatures. Harper employs its years of experience and multiple proprietary features to implement systems that perform reliably for extended periods at these elevated temperatures.
Examples of our engineering advancements for UHTs include our positive seal construction techniques resulting in greatly enhanced furnace life, and heating area composed of a well insulated chamber which minimizes the heat loss from the system. Additionally, our multifaceted approach to superior gas tight construction minimizes required heating chamber purge rates to increase furnace life. Special attention is given to the UHT system in terms of design and inspection for gas tight construction. The steel shell gas sealing welds are inspected by an independent inspector for visual and dye penetrate testing, and once the system is assembled a pressure test is conducted prior to shipment to ensure gas tight construction.