Issue: Aug 2013


500ºF GAS-FIRED WALK-IN OVEN



by Alan Tran

No. 940 is a gas-fired 500°F (~260°C) walk-in oven from Grieve, currently used for curing brake friction materials at the customer’s facility. Workspace dimensions are 72” wide x 96” deep x 78” high. 400,000 BTU/HR are installed in a modulating natural gas burner inside the oven, while 700,000 BTU/HR are installed in a modulating natural gas afterburner. The oven’s initial exhaust passes through the 1400ºF afterburner. A 6000 CFM, 5-HP recirculating blower provides combination airflow to the workload.

The oven has 4” thick insulated walls, aluminized steel interior and exterior, plus a top-mounted heating chamber. All safety equipment required by IRI, FM and NFPA Standard 96 for gas-heated equipment is onboard, including a 650 CFM, ½-HP powered forced exhauster.

Controls on No. 872 include digital indicating temperature controllers and a 10” diameter circular chart recorder.


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