April 22, 2011

No. 829 is an electrically-heated 250°F (121.11°C) belt conveyor oven from Grieve, currently used for curing epoxy on metal and nylon filter assemblies. 40 KW are installed in Incoloy sheathed tubular heating elements. Workspace dimensions are 30″ wide x 120″ deep x 15″ high.

The unit has 4″ insulated walls and an aluminized steel interior and exterior. A 4200 CFM, 3-HP recirculating blower provides vertical upward and downward airflow to the unit. The oven has three zones: 2′ long open belt loading zone, 10′ long heat zone with recirculated airflow, and 2′ long open unloading zone. The product is moved through the oven on a 24″ wide, 1″ x 1″ 304 stainless flatwire conveyor belt with a 1/4 HP motor drive, variable from 0.3′ to 6′ per minute.

Controls on No. 829 include a digital indicating temperature controller, manual reset excess temperature controller with separate contactors, SCR power controller, fused disconnect switch, and recirculating blower airflow safety switch.