A 550°F (288°C) shelf oven with 12 kW in Nichrome wire heating elements is used for drying powdered resin in trays. A 1,000-cfm, 1-hp recirculating blower provides horizontal airflow to the workload.

Manufactured by Grieve Corp., Round Lake, Ill., the oven includes a digital-indicating temperature controller, manual-reset excess-temperature controller with separate contactors, recirculating blower-airflow safety switch and a 10” diameter circular chart recorder. The unit, which has 4” insulated walls and four independent doors for access to workspace, includes a digital timer for each compartment with button and pilot light to indicate end of cycle.