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Bench Ovens

BULLETIN
BH-200

FORCED CONVECTION
BENCH OVENS


 


Economical ovens easily moved to various locations. For processing large parts, baking, drying components after cleaning, dehydration, preheating, curing and other applications requiring circulation of heated air.

STANDARD FEATURES Back to Top

—Recirculating blower
—304 stainless steel interior
—Incoloy sheathed tubular heating elements
—Silicone rubber door gasket
—Sturdy welded steel construction
—Calibrated temperature controller
—Manual reset excess temperature interlock
—On-off switch
—Red pilot light indicates heater operation
—Brushed stainless steel exterior
—6 lb/cf density industrial rockwool insulation
—3-wire cord and plug on 115 volt models
—Fully factory tested
—1 year limited warranty



  MODEL NB-350
Provides 7 cubic feet of work space at temperatures to 350°F. Includes two (2) removable nickel plated wire shelves easily adjustable on 2" centers. Holds a maximum of seven (7) shelves. Widely used for drying small items, preheating plastics, drying powdered metals and curing potting compounds. Double doors for easy loading of large parts.

MODEL NB-550
Similar to Model NB-350. Also includes two (2) shelves and will hold a maximum of seven (7) shelves. Provides over 5 cubic feet of work space at temperatures to 550°F. Ideal for high temperature processes such as
annealing springs and plated parts.

MODEL DR-350
Specially designed for processing and drying of plastic granules, powdered metal parts and other small parts that must be separated. Eight (8) individual 304 stainless steel drawers keep parts separated and allow individual inspection or removal without opening conventional doors. This reduces heat loss and prevents process interruption. Temperatures to 350°F. Standard drawers have 3/4" diameter perforations on 1 1/4" staggered centers on bottom and sides. Solid drawers also available.

   
SPECIFICATIONS Back to Top
NOT FOR USE WITH FLAMMABLE SOLVENTS OR VAPORS. OTHER MODELS
AVAILABLE FOR THESE APPLICATIONS–PLEASE CONSULT FACTORY.
Model
Work Space
Outside
Dimensions
(WxDxH)
Maximum
Temperature
Insu-
lation
Watts
Operating Characteristics†
Approx
Shipping
Weight
Dimensions
(WxDxH)
Volume
Cu Ft
115V*
208V
230V
Control
Accuracy
Oven
Uniformity
Rise Time
115V 230V
NB-350 28" x 24" x 18" 7 41" x 30" x 23" 350°F 2" 2000 2000 ±10°F ±10°F 17 min 17 min 210 lbs 
NB-550 26" x 22" x 16" 5.3 41" x 30" x 23" 550°F 3" 2400 3000 ±10°F ±15°F 32 min 21 min 235 lbs 
DR-350 8 Drawers 4.8 41" x 30" x 23" 350°F 2" 2000 2000 ±10°F ±25°F 20 min 20 min 285 lbs 
*Model NB-550 requires 30 ampere service on 115 volts.
‡Eight (8) individual 304 stainless steel drawers each 11.75" W x 25" D x 2" H
(3.5" total height clearance). Perforated metal bottoms and sides standard,
solid bottoms and sides available at no additional cost.
  †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
Standard Electrical Characteristics
— 115 volts, 60 Hz, 3-wire cord with plug
— 208 volts, 1-phase, 60 Hz
— 230 volts, 1-phase, 60 Hz
— Other electrical characteristics available

Standard Temperature Control Systems
Calibrated main temperature controller regulates desired oven temperature. Independent manual reset excess temperature interlock protects against failure of main temperature controller. On-off switch located on panel controls electrical power to oven. Red pilot light indicates heater operation.


 


Circulation Diagrams
(Top View)

 











Model NB-350, including optional:
— roof mounted, exhaust chamber adapter
— drying pans and two (2) additional shelves
— shut down timer
— oven stand

 
ADDITIONAL EQUIPMENT AVAILABLE Back to Top
Additional Shelves, 20 lbs distributed load per shelf, 40 lbs maximum oven load, specify oven model when ordering.

 

Dial Thermometer
10-290°C, 50-550°F dual scale range
Option T550F

Digital Indicating Temperature Controller
, microprocessor based, thermocouple actuated, in lieu of standard controller.
Option DIG1

Digital Timing Temperature Controller, microprocessor based, digital indicating, incorporates 99 hour 59 minute timer. Starts timing when temperature reaches set point and shuts down oven heat at end
of set time.
Option DTS1

Programmable Temperature Controller
, microprocessor based, digital indicating, thermocouple actuated, in lieu of standard controller.
Option PTC1

Recording Thermometer, thermocouple actuated, 24-hour, 10" diameter circular chart requires optional Digital Controller DIG1, DTS1 or PTC1 (side mounted).
Option RT1

Adjustable Excess Temperature Interlock, thermocouple actuated, manual reset.
Option AETC

Solid State Relay,in lieu of standard contacter.
Option SSR

Shut Down Timer, with continuous "hold" feature
60 minute range.
12 hour range.
Option BTMR60
Option BTMR12

Set of Eight (8) 304 Stainless Steel Drying Pans, 11 1/2" W x 20" D x 2" H (NB Models only, requires two (2) add'l shelves).
Option NBPN3

Oven Stand, raises unit to convenient 31" work level Shipped separately, requires assembly.
Option STNDNB

Exhaust Chamber Adapter, to fit standard 3" stove pipe. Shipped separately, requires assembly.
Option BEXCH

 

 
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