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Large Capacity
Bench Ovens

BULLETIN
BH-303

ECONOMICAL
LARGE WORK SPACE
BENCH OVENS


 

Low cost, large capacity Bench ovens for shelf processing at temperatures to 400°F. Designed to handle a wide variety of applications such as baking, curing, drying and preheating.

STANDARD FEATURES Back to Top
UL LISTED CONTROL PANEL
  Standard Large Capacity Bench Ovens from Grieve meet the requirements of National Fire Protection Association Standard 86, Industrial Risk Insurers, Factory Mutual and OSHA standards. For some applications, such as those involving flammable solvents or hazardous locations, the above organizations require additional safety devices.

Controls
—Analog, thermocouple actuated, temperature controller
—Motor control push buttons
—On-off heat switch
—LED pilot lights



Safety Equipment — Electric Oven
— Adjustable, thermocouple actuated, manual reset excess temperature interlock
— Separate heating element control contactors
— Recirculating blower air flow safety switch


Construction
—304 stainless steel interior
—Explosion venting latches
—2" of 6 lb/cf density industrial rockwool insulation
—Built-in baffle prevents radiant heat
—Silicone rubber door gasket
—Aluminized steel exterior with enamel finish
—Brushed stainless steel control panel face
—Incoloy sheathed tubular heating elements
—Two (2) nickel plated wire shelves
—Channel shelf supports prevent shelves tipping
—Adjustable fresh air intake and exhaust dampers
—High pressure recirculating blower
—All welded construction
—1 year limited warranty


Every oven fully assembled and individually factory tested

 

   
SPECIFICATIONS Back to Top
  CAUTION: OVENS PROCESSING COMBUSTIBLE MATERIAL ARE REQUIRED BY NATIONAL FIRE PROTECTION ASSOCIATION STANDARD 86 TO HAVE A FIRE SUPPRESSION SYSTEM. IF FLAMMABLE SOLVENTS OR VAPORS ARE PRESENT IN AN OVEN, OSHA REQUIRES CONFORMANCE WITH NFPA 86 WHICH DEFINES OVENS FOR THESE APPLICATIONS AS CLASS A OVENS. A POWERED FORCED EXHAUSTER AND OTHER NON-STANDARD SAFETY EQUIPMENT MUST BE ADDED. SEE BULLETIN TC-940 AND CONSULT FACTORY.
Model
Work Space
Outside
Dimensions*
(WxDxH)
Max
Temp
Blower
Insu-
lation
Doors
kW
Operating Characteristics†
Approx
Shipping
Weight
Dimensions
(WxDxH)
Volume
Cu Ft
CFM HP Control
Accuracy
Oven
Uniformity
Rise Time
323 36" x 21" x 36" 15.8 40" x 28" x 47" 400°F 400 1/3 2" Double 4.4 ±0.5% ±8°F 18 min 600 lbs
333 36" x 36" x 36" 27 40" x 43" x 47" 400°F 400 1/3 2" Double 6.6 ±0.5% ±8°F 18 min 750 lbs
343 36" x 48" x 36" 36 40" x 55" x 47" 400°F 400 1/3 2" Double 6.6 ±0.5% ±8°F 22 min 850 lbs
  *Blower motor extends 9.5" above. Control panel overhang 9" right side.
‡Model 323 has two (2) heating elements which result in an open delta heater connection on 3-phase electrical service.
  †Accuracy as percent of controller span. Uniformity at 50°F below maximum temperature. Rise Time in minutes to 50°F below maximum temperature. Tests run with empty oven and minimum exhaust. Performance will vary with load, exhaust rate and application. See Bulletin TC-920 for additional details.
STANDARD EQUIPMENT   Back to Top
All Models
— 208 volts, 3-phase, 60 Hz
— 230 volts, 3-phase, 60 Hz
— 460 volts, 3-phase, 60 Hz
— Other electrical characteristics available

Each features completely wired, side access UL listed control panel enclosing terminals for incoming power, temperature controllers, push buttons and pilot lights. Motor starter and heating element contactors electrically interlocked to shut off heaters if power to blower is interrupted and to permit operation of blower without heat for cooling. Incoloy sheathed tubular heating element.

Two (2) reinforced 50 lbs uniformly distributed load capacity nickel plated wire shelves; ten (10) pair shelf support channels on 3" centers; 200 lbs maximum oven load.


304 stainless steel interior with carbon steel blower and plated hardware. Trilite Green enamel painted aluminized steel exterior. Exhaust outlet 4" diameter.


MODEL 323
Designed specifically to fit through a standard 30" wide door opening, when fully assembled. This model provides a generous 16 cubic feet of work space.

MODEL 333
Provides a roomy 27 cubic feet of work space -- 70% more capacity at only a little more cost than our Model 323.

MODEL 343
It's a full foot deeper than Model 333. Ideal for longer or larger items and bigger batches. A giant 36 cubic feet of work space.
.


Circulation Diagrams
(Front View)

Heated air is blown forward between shelves and across parts.

 



MODEL 333
WITH OPTIONAL PROGRAMMABLE
TEMPERATURE CONTROLLER AND OVEN STAND


80 CFM Powered Forced Exhauster, driven by a 1/8-HP motor, with 4" diameter outlet
Option X80

304 Stainless Steel Components, including blower wheel, hardware and two (2) stainless steel expanded metal shelves, specify oven model when ordering.

304 Stainless Steel Shelves, reinforced expanded metal, specify oven model when ordering

 
ADDITIONAL EQUIPMENT AVAILABLE Back to Top

See Bulletin TC-960 for modifications and other optional equipment.

Additional Shelves, 50 lbs distributed load per shelf, 200 lbs maximum oven load, specify oven model when ordering.

Digital Indicating Temperature Controller, microprocessor based, thermocouple actuated, in lieu of standard controller
Option DIG2


Programmable Temperature Controller, microprocessor based, digital indicating, thermocouple actuated, in lieu of standard controller
Option PCT2


Recording Thermometer, thermocouple actuated, 24-hour, 10" diameter circular chart used in conjunction with standard controller
Option RT


Digital Timing Temperature Controller, microprocessor based, digital indicating, incorperates 99 hour 59 minute timer. Starts timing when temperature reaches set point and shuts down oven at end of set time
Option DTS2


Digital Shut Down Timer, with continuous "hold" feature
Option SDT


Digital Batch Timer, for uniformly timing batch operations. Continuous alarm with door interlock; alarms at end of preset period until door is opened or timer reset
Option BT


Automatic Door Switch, turns off blower and heat when door is opened. Restores blower and heat when door is closed
Option ADS


Oven Stand, to hold oven at convenient 24" working height. Specify model number of oven when ordering stand. Shipped separately, requires assembly
Option STND

 
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