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Temperature uniformity study on Despatch Industries’ PN Series furnace exceeds company expectations

Minneapolis, Minn. – When Despatch Industries received an order from a longtime customer wanting a second PNF Inert Atmosphere Furnace for its beryllium copper aging process, a precondition of the order was that a test be performed to confirm that a uniformity of +/- 10°F at 1000°F could be maintained.

The customer had confidence that the furnace would perform well but wanted assurance before committing to another purchase. A Despatch engineer was sent to the customer’s facility to perform a field nine-point temperature uniformity test on the Despatch furnace currently in use. The oven was programmed to ramp and soak at three different temperatures and data collected. The furnace performed even better than expected with temperature uniformity between +/- 4.3° and 6.8°F (2.4°C and 3.8°C).

“The results were very good, much better than the plus or minus 10° we needed to meet,” said Rolf Kragseth, Despatch Industries applications engineer. “As engineers we never want to over-estimate performance claims. What this data showed to us is that it would be to our benefit to do more of this testing.”

“The furnace is designed with adjustable recirculating air louvers that allow fine tuning to ensure uniform airflow so we had assumed it would perform well, now we have the measurements to prove it,” added Daniel Ruf, manager of Despatch Innovation Center.

The PN Series Inert Atmosphere Furnace was characterized with thermocouples in a conventional 9-point array: 8-corners and center. The oven was programmed to ramp and soak at three different temperatures and data collected.

Despatch Industries has specialized in thermal processing for over 100 years, providing innovative solutions to critical applications in a broad range of markets and cutting edge technology worldwide.
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