No. 919 is a seven-zone, gas-heated belt conveyor oven from Grieve, currently used to cure various coatings onto ceramic parts. Maximum operating temperatures are 350°F in Zones 1-4 and 1000°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.
400,000 BTU/hr. are 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 is powered by a 1-HP motor drive, variable from 1.5 to 30 inches per minute.
A 30,000 CFM, 30-HP recirculating blower 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, push / pull air through the oven’s cooling zone.
This Grieve belt conveyor oven features 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.
The unit has top mounted heating chambers, doors for access to the work space and heat chambers in each zone and is designed to be split into two sections for easier shipment.
No. 919 has onboard all safety devices required by IRI, FM and NFPA Standard 86 for gas-heated equipment, as well as digital indicating temperature controllers.
