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500°F Inert Atmosphere Oven Operates in Small Workspace

No. 967 is an electrically-heated 500°F(~260°C) inert atmosphere oven from Grieve, currently used for various heat treating operations at the customer's facility. 9 KW are installed in Incoloy sheated tubular heating elements. Workspace dimensions are 24" wide x 24" deep x 24" high. A 400 CFM, 1/3-HP re-circulating blower provides horizontal front-to-rear airflow to the workload.

The unit has 4" insulated walls, an aluminized steel exterior and Type 430, 2B finish stainless steel interior. The door is equipped with adjustable positive-latching door hardware and adjustable offset hinges. A 130 CFM blower pulls air through the air jacket on the inner oven for cooling and a solenoid automatically opens the outlet for purging.

On this Grieve inert atmosphere oven, the inner oven walls are sealed directly against a 1/2" thick silicone rubber door seal with an air jacket installed on the inner oven for cooling and a blower shaft seal and outlet with pressure relief also onboard. All the interior seams are welded gas-tight and all wall penetrations are equipped with compression fittings.

Controls onboard No. 967 include a digital programming temperature controller, manual reset excess temperature controller with separate contactors and a re-circulating blower airflow safety switch. The critical pressure of the oven chamber is monitored with a pressure regulator, flow meter and pressure gauge.

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