May 22, 2012

No. 966 is a 1250°F (676.6°C), electrically-heated, inert atmosphere oven from Grieve, currently used for stress relief of machined steel. Workspace dimensions are 24″ wide x 36″ deep x 24″ high. 18 KW are installed in Incoloy sheathed tubular elements to heat the oven chamber, while a 1000 CFM, 1 HP recirculating blower provides horizontal front-to-rear airflow to the workload.

This Grieve high-temp, inert atmosphere oven features 10″ insulated walls comprising 2″ of 1900°F block and 8″ of 10 lb/cf density rockwool insulation, aluminized steel exterior, and Type 304, 2B finish stainless steel interior. The inner door gasket seals directly against the door plug while the outer gasket seals directly against the front face of the oven. An integral oven leg stand is also provided.

Inert atmosphere construction on this Grieve oven includes pressure gauge, internal high-temperature gasket, all-welded construction in doorway throat, air jacket on inner oven for cooling, 1/2″ thick silicone rubber atmosphere seal, blower shaft seal, positive latching door hardware, adjustable offset door hinges, outlet with pressure relief, interior seams welded gas-tight and all wall penetrations fitted with compression fittings. A 650 CFM stainless steel blower pulls air through the air jacket on the inner oven for cooling.

Controls on No. 966 include a digital programming temperature controller, manual reset excess temperature controller with separate contactors, and recirculating blower airflow safety switch.