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Tag Archives: two-zone belt conveyor oven

500ºF Electric Two-zone Belt Conveyor Oven

992 GrieveNo. 992 is an electrically-heated, 500ºF (~260ºC) two-zone belt conveyor oven from Grieve, currently used for drying and curing ceramic cement at the customer’s facility.  48 KW (24 KW per zone) are installed in Nichrome wire elements to heat the oven chamber, while 4000 CFM (2000 CFM in each zone) are provided by two 2-HP recirculating blowers with vertical downward airflow to the workload.

Each of the two work zones in this belt conveyor oven consists of a 2’ long insulated, unheated entrance vestibule; 4’ long insulated heat zone with recirculating airflow; 2’ long insulated, unheated exit vestibule; 1’ long open zone; 5’ long cooling zone and 1’ long open belt loading and unloading zone.

The conveyor belt on No. 992 is 30” wide, 1” x 1” high carbon steel flat wire, powered by a 1/3-HP motor drive, variable from 0.5 to 10 ipm.  Also onboard this oven are two 16” diameter tubeaxial fans, each driven by a 3/4-HP motor to push/pull air through the cooling zones.

The Grieve conveyor oven further features 4” insulated walls, aluminized steel interior and exterior, plus two doors for access to the workspace and heating chambers.

Controls on No. 992, provided in one cabinet for each of the two heating zones (as shown in photo), include a digital indicating temperature controller, manual reset excess temperature controller with separate contactors and a recirculating blower airflow safety switch.

For more information, please contact:

THE GRIEVE CORPORATION
500 Hart Road
Round Lake, IL  60073-2898
Phone:  (847) 546-8225
Fax:  (847) 546-9210
Web:  www.grievecorp.com
Email:  sales@grievecorp.com
Attention:  Frank Calabrese, VP

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Two-zone Gas-heated Belt Conveyor Oven from Grieve

791I GrieveNo. 791 is a gas-heated, two-zone belt conveyor oven from Grieve, currently used to stress relieve heavy-duty steel springs.  This unit has a maximum operating temperature of 850°F and workspace dimensions of 48″ W x 360″ L x 15″ H.

The conveyor includes a 4′ long open belt loading zone, 2′ long insulated unheated entrance vestibule, two 15′ long insulated heating zones with independent recirculated airflow and temperature controls, 2′ long insulated unheated exit vestibule and 3 1/2′ long open unloading zone.

Heat is provided by 1,600,000 BTU/HR installed in two modulating natural gas burners.  Two 10,000 CFM, 7 1/2 HP recirculating blowers provide vertical downward airflow over the workload.

All safety devices required by IRI, FM and NFPA Standard 86 for gas-heated equipment are included on this Grieve oven, which also features a two-pen, 10″ diameter circular chart recorder.

Other construction features on No. 791 comprise a 42″ wide, 1″ x 1/2″ flatwire conveyor belt with 1/3 HP motor drive, variable speed from 5.8 to 16.1 inches per minute, 7″ insulated walls throughout, a Type 304, 2B finish stainless steel interior and an exhaust hood over each end of the oven, equipped with a 12″ dia. tubeaxial fan driven by a 1/2 HP motor.

For more information, please contact:

THE GRIEVE CORPORATION
500 Hart Road
Round Lake, IL  60073-2898
Phone:  (847) 546-8225
Fax:  (847) 546-9210
Web:  www.grievecorp.com
Email:  sales@grievecorp.com
Attention:  Frank Calabrese, VP

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250ºF Electric Two-zone, 50 Ft. Conveyor Oven

972 GrieveNo. 972 is an electrically-heated, 250ºF (120ºC) two-zone belt conveyor oven from Grieve, currently used to cure a coating onto plastic sheets at the customer’s facility.  Workspace dimensions measure 48” W x 50’D x 15” H.  80KW (40KW per zone) are installed in Incoloy sheathed tubular elements to heat the unit, while 25,000 CFM total from two 10-HP recirculating blower motors provide vertical downward airflow to the workload.  The oven’s travel comprises a 36”  long open belt loading zone, two 25’ long insulated heating zones with independent recirculated airflow and temperature control, plus a 36” long open belt unloading zone.  A 42” wide, 1” x 1” flat wire plastic conveyor belt is driven by a 1/2-HP motor drive, variable from 1-20 feet per minute.

This Grieve conveyor oven features 4” thick insulated walls throughout, an aluminized steel exterior, Type 304, 2B finish stainless steel interior with continuously back-welded seams and all wall penetrations fitted with compression fittings.  The oven is split into two sections for shipment and reassembly at the customer’s location.  Side access doors to the workload and heating chambers are located along the entire length of the unit.

Controls on No. 972 include digital indicating temperature controllers, manual reset excess temperature controllers with separate contactors, recirculating blower airflow safety switches, 10” diameter, two-pen circular chart temperature recorders and SCR power controllers for the heating zones.

For more information, please contact:

THE GRIEVE CORPORATION
500 Hart Road
Round Lake, IL  60073-2898
Phone:  (847) 546-8225
Fax:  (847) 546-9210
Web:  www.grievecorp.com
Email:  sales@grievecorp.com
Attention:  Frank Calabrese, VP

Continue reading