Inert Atmospheric Ovens

Bulletin CA-470

FRONT TO BACK
HORIZONTAL AIR FLOW
INERT ATMOSPHERE OVENS

Inert atmosphere ovens for operation at up to 4000C. Protect parts from oxidation using any non-flammable gas such as Nitrogen, Argon or Carbon Dioxide. Front to back horizontal airflow completely surrounds work on shelves or large parts placed directly on the optional reinforced workspace bottom. Includes cooling jacket, which can be equipped with optional cooling atmosphere purge solenoid, cooling blower and programming temperature controller provides completely automatic sequencing.

STANDARD FEATURES

Controls

Digital, microprocessor based, thermocouple actuated, indicating temperature controller
Motor control push buttons
On-off heat switch
Easy-to-see pilot lights

Safety Equipment

Adjustable, thermocouple actuated, manual reset excess temperature controller
Separate heating element control contactors
Re circulating blower air flow safety switch.

Construction

All interior seams welded gas-tight
All wall penetrations welded at inside and fitted with compression fitting at outside of oven.
Inner oven walls extended through oven throat area to seal directly against silicone rubber door seal
2-point cam action positive latching door hardware
Adjustable offset door hinges to guarantee tight closure of door seal
Exterior blower shaft seal
Inert atmosphere inlet with pressure regulator to maintain positive pressure within oven
0-100 CFH atmosphere flow meter
Pressure gauge to indicate interior oven pressure
Inert atmosphere outlet with pressure relief
Air jacket on inner oven for cooling
304 stainless steel interior
Aluminized steel exterior with enamel finish
Brushed stainless steel control panel face
10 lbs./cf. density industrial rock wool insulation
Built-in baffles prevent radiant heat
Two (2) nickel plated wire shelves
Channel shelf supports prevent shelves tipping
1 year limited warranty

Every oven fully assembled and individually factory tested

SPECIFICATIONS

Model	Work Space	Outside	Max Temp	Blower		Insulation	KW	Operatin Characteristics
	Dimensions (W x D x H)	Dimensions (W x D x H)		CFM	HP			Control Accuracy	Oven Uniformity	Rise time Electric
LA- 275	24" x 24" x 24"	38" x 48" x 34"	2750C	400	1/3	4"	9	+ 0.3%	+ 50C	23 min
LA- 400	24" x 24" x 24"	42" x 52" x 38"	4000C	400	1/3	6"	12	+ 0.3%	+ 50C	46 min
IB- 275	24" x 36" x 24"	38" x 60" x 34"	2750C	400	1/3	4"	9	+ 0.3%	+ 50C	30 min
IB- 400	24" x 36" x 24"	42" x 64" x 38"	4000C	400	1/3	6"	12	+ 0.3%	+ 50C	57 min
IC- 275	36" x 36" x 36"	50" x 58" x 46"	2750C	600	1/2	4"	9	+ 0.3%	+ 50C	39 min
IC- 400	36" x 36" x 36"	54" x 62" x 50"	4000C	600	1/2	6"	12	+ 0.3%	+ 50C	55 min
ID- 275	36" x 48" x 36"	50" x 70" x 46"	2750C	600	1/2	4"	9	+ 0.3%	+ 50C	52 min
ID- 400	36" x 48" x 36"	54" x 74" x 50"	4000C	600	1/2	6"	12	+ 0.3%	+ 50C	73 min

Specifications subject to change without prior notice

STANDARD EQUIPMENT

- 230 volts, 3-phase, 50 Hz
- Other electrical characteristics available
Each features completely wired, top access control panel enclosing terminals for incoming power, temperature controllers, push buttons and pilot lights. Motor starter and heating element contractors electrically interlocked to shut off heaters if power is interrupted and to permit operation of blower without heat of cooling. Incoloy sheathed tubular heating elements
Two (2) reinforced 100 lbs. uniformly distributed load capacity, nickel-plated wire shelves. 304 stainless steel interior and Trilite Green enamel painted aluminized steel exterior.
Inert atmosphere is introduced at blower shaft (½" NPT) and positive oven pressure maintained by inlet pressure regulator. Atmosphere flow indicated on 0-100 CFH flow meter. Oven pressure indicated on 0-2" water column pressure gauge. Continuously welded inner oven construction with compression fittings at wall penetrations maintains atmosphere integrity. Atmosphere outlet equipped with pressure relief, which can be manually opened to increase inert gas flow for initial purge of air from oven. Adjustable positive latching door hardware and offset hinges assures positive door seal

ADDITIONAL EQUIPMENT AVAILABLE

Additional Shelves, 100 lbs. distributed load per shelf, 400 lbs. maximum oven load, specify oven model when ordering.
Programmable Temperature Controller, microprocessor based, digital indicating, thermocouple actuated, in lieu of standard controller ........... PTC3
Recording Thermometer, thermocouple actuated, 24-hour, 10" diameter circular chart used in conjunction with standard controller (side mounted)..............................................................................................................RT
Programmable Recording Temperature Controller, microprocessor based, thermocouple actuated, digital display, 24-hour, 10" diameter circular chart, in lieu of standard controller (side mounted).................. PRTC3
Digital Timing System, incorporated into standard temperature controller, 99 hour 59 minute range, starts timing when temperature reaches set point and shuts down oven at end of set time .......... DTS3
Shut Down Timer, with continuous "hold" feature 1,5,10 or hour range..............STD
Batch Timer, for uniformly timing batch operations. Continuous alarm with door interlock; alarms at end of preset time period until door is opened or timer reset. 1,5,10 or 30 hour range........................BT
Automatic Door Switch turns off blower and heat when door is opened. Restores blower and heat when door is closed...........ADS
24" Integral Oven Legs, with 1/8" steel plate shelf. Specify oven model when ordering.
24" Removable Oven Stand, with 1/8" steel plate shelf, Specify oven model when ordering..........RSTND
500 Ibs Capacity Carbon Steel Subway Grating, oven workspace bottom. Reduces workspace height by 1". Specify oven model when ordering....................SUB
Automatic Purge Solenoid, opens oven outlet automatically to purge air from oven, requires installation of optional programmable temperature controller................................APS
Cooling Blower, connected to air jacket to provide accelerated cooling, includes two position motorized dampers, requires installation of optional programmable temperature controller.............CB
Modulating Dampers, to regulate cool down rate replaces two position dampers included with cooling blower. Includes heating/cooling programmable temperature controller in lieu of optional programmable temperature controller required with cooling blower.......................MD

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