No. 919 is a seven-zone, gas-heated belt conveyor oven from The Grieve Corporation (Round Lake, IL), currently used to cure various coatings onto ceramic parts. Maximum operating temperatures are 350°F in Zones 1-4, and 1,000°F in Zones 5-7. Workspace dimensions measure 51”W x 56’D x 15”H, with a 30” long open belt loading zone, four 3’ long insulated heat zones with independent recirculated airflow and temperature control (350°F), 30” long open zone, three 3’ long insulated heat zones with independent recirculated airflow and temperature control (1000°F), 9’ long cooling zone and 3’ long open unloading zone. Other benefits include:
- 400,000 BTU/hr. installed in modulating natural gas burners in Zones 1-4, with 500,000 BTU/hr. in Zones 5-7.
- A 1/2” wide, B36-20-12-14, Type 316 stainless steel balanced weave conveyor belt, powered by a 1-HP motor drive, variable from 1.5 to 30 inches per minute.
- A 30,000 CFM, 30-HP recirculating blower, which provides vertical upward airflow to the workload in Zones 1-4, while 25,000 CFM, 20-HP unit in Zone 5 and 12,500 CFM, 10-HP units in Zones 6-7 do likewise.
- Two 36” diameter tubeaxial fans, each driven by a 5-HP motor, to push/pull air through the oven’s cooling zone.
- An aluminized steel exterior and Type 316L, 2B finish stainless steel interior with continuously welded seams. There are 4” thick insulated walls in Zones 1-4 and 8” thick insulated walls, comprising 2” of 1900°F block and 6” of 10 lb/cf density rockwool, in Zones 5-7.