Questions? CALL: (847) 546-8225 or EMAIL: sales@grievecorp.com

Vertical Air Flow
Cabinet Ovens

BULLETIN
CA-402

HEAVY DUTY
ELECTRIC AND GAS
VERTICAL AIR FLOW
CABINET OVENS


 


Vertical air flow Cabinet ovens specifically designed for work loads where the heated air must pass upward through the load, such as open ended cylinders or hanging parts. Two sizes, 14.9 and 28.6 cubic feet, at temperatures up to 850°F.

STANDARD FEATURES Back to Top
UL LISTED CONTROL PANEL
Standard Cabinet 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
— Digital, microprocessor based, thermocouple actuated, indicating temperature controller
— Modulating burner on gas ovens
— Motor control push buttons and 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

Safety Equipment — Gas Oven
— Adjustable, thermocouple actuated, manual reset excess temperature interlock

— Electronic flame safeguard protection
— 325 CFM powered forced exhauster for combustion venting
— Exhauster air flow safety switch
— Recirculating blower air flow safety switch
— Purge timer
— High gas pressure switch
— Low gas pressure switch
— Two pilot safety shutoff valves with leak test stations
— Two main safety shutoff valves with leak test stations
— Valve position indicator on main safety shutoff valves

Construction
— Adjustable opposed louvers on full coverage supply and return duct work
— 304 stainless steel interior
— Aluminized steel exterior with enamel finish
— Brushed stainless steel control panel face
— Built-in baffles prevent radiant heat
— Exceptionally heavy duty doors and door frame with explosion venting latches
— High temperature door gasket with stainless steel spring insert
— 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
— 10 lbs/cf density industrial rockwool insulation
— 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
Heat Input
Operating Characteristics†
Approx
Shipping
Weight
Dimensions
(WxDxH)
Volume
Cu Ft
CFM
HP
kW
BTU/HR
Control
Accuracy
Oven
Uniformity
Rise Time
Electric Gas
VA-550 26" x 26" x 38" 14.9 38" x 55" x 68" 550°F 700 1/2 6" Single 6.6 50,000 ±0.3% ±5°F 70 min 25 min 1380 lbs 
VA-700 26" x 26" x 38" 14.9 42" x 59" x 72" 700°F 1000 1 8" Single 10 75,000 ±0.3% ±6°F 58 min 28 min 1750 lbs 
VA-850 26" x 26" x 38" 14.9 42" x 59" x 72" 850°F 1000 1 8" Single 15 100,000 ±0.3% ±8°F 65 min 34 min 1850 lbs 
VB-550 26" x 38" x 50" 28.6 38" x 67" x 80" 550°F 700 1/2 6" Single 9 75,000 ±0.3% ±5°F 47 min 24 min 1940 lbs 
VB-700 26" x 38" x 50" 28.6 42" x 71" x 84" 700°F 1000 1 8" Single 15 125,000 ±0.3% ±6°F 50 min 27 min 2275 lbs 
VB-850 26" x 38" x 50" 28.6 42" x 71" x 84" 850°F 1000 1 8" Single 20 150,000 ±0.3% ±8°F 55 min 33 min 2475 lbs 
*All Models—Control panel overhang 9" right side. Blower motor overhang 10" at rear on 550°F models, 17" on 700°F and 850°F models.
Gas Models—Burner overhang 15" left side.

.
  †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 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

Two (2) reinforced 200 lbs uniformly distributed load capacity, nickel plated wire shelves; shelf support channels on 3" centers. 304 stainless steel interior with carbon steel blower and plated hardware. Trilite Green enamel painted aluminized steel exterior.

These electric or gas models come in two sizes. They feature full vertical air flow for processing at temperatures to 850°F. Used where least restriction to free air passage is in the vertical direction. Heated air is supplied at the bottom of the work space and sweeps upward through the work load. Ideal for hanging long parts or for applications requiring heated air to pass both around the outside and through the middle of parts such as open ended cylinders.


VA Series – 14.9 cubic feet, holds 12 shelves
VB Series – 28.6 cubic feet, holds 16 shelves

Due to vertical air flow, a large number of shelves or dense shelf loading will restrict air flow and may adversely affect oven operation.

 


Electric Models
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 elements. Exhaust outlet 4" diameter.

Gas Models
—1,000 BTU natural gas at 6" water column pressure, 1" NPT inlet
—Other gas characteristics available

Control panel as detailed above and safety devices as listed on the front of this bulletin. Automatic pre-ignition purge period and push button electric ignition contributes to ease of operation. Modulating gas burner is protected with electronic flame safety relay.


Circulation Diagrams
(Side View)

Heated air is provided at the
bottom and pulled upward through
shelves and load.

 





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

Roof Mounted Powered Forced Exhausters
with exhauster air flow safety switch†

Capacity HP Outlet
Diameter
Height
80 CFM‡ 1/8 4" 16"
130 CFM 1/3 4" 20"
325 CFM 1/3 6" 23"
650 CFM 1/2 6" 23"
†Gas ovens include 325 CFM exhauster.
Electric ovens may require additional heat input.
‡550°F Models only

 
ADDITIONAL EQUIPMENT AVAILABLE Back to Top

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

Additional Shelves, 200 lbs distributed load per shelf, 800 lbs maximum oven load, specify oven model when ordering.

Programmable Temperature Controller
, microprocessor based, digital indicating, thermocouple actuated, in lieu of standard controller
Option PTC3


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 DTS3


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


304 Stainless Steel Components, including blower wheel, hardware and two stainless steel expanded metal shelves, specify oven model when ordering.
 
 
Previous Catalog Page
Next Catalog Page

Grieve Industrial Ovens & Industrial Furnaces Home Page
Specifications Subject to Change Without Notice
Copyright The Grieve Corporation All Rights Reserved.