Bulletin CA-480

High Temperature
Inert Atmosphere Ovens

5250C AND 6750C
FRONT TO BACK
HORIZONTAL AIR FLOW
INERT ATMOSPHERE OVENS
Inert atmosphere ovens for operation at up to 6750C. 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 quipped with optional cooling blower and automatic dampers. Installation of optional 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
- Recirculating 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 
- Silicone rubber atmosphere seal at outside perimeter of oven door 

Inert Atmosphere Ovens
- High temperature inner door gasket with stainless steel spring insert to seal heat in oven and protect atmosphere 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 
- 16 gauge aluminized steel interior on 5250C Models
- 16 gauge 304 stainless steel exterior with enamel finish 
- Brushed stainless steel control panel face 
- Insulated with 2" thick 10500C insulating block backed up with 10 lbs. / cf. density industrial rockwool 
- Built in baffles prevent radiant heat 
- Two (2) stainless steel wire shelves
- Channel shelf supports prevent shelves tipping 
- 1 year limited warranty 

· Every oven fully assembled and individually factory tested
Inert Atmosphere Ovens

Specifications  

Model

Work Space

Dimensions

(W x D x H)

Outside Dimensions (W x D x H)

Max Temp

Blower

Insulation

Doors

kW

Operating Characteristics

CFM

HP

Control Accuracy

Oven Uniformity

Rise Time

Electric

IA- 525

24” x 24” x 24”

49” x 56” x 43½”

5250C

400

½

8”

Single

12

+ 0.3%

+ 40C

100 min

IA- 675

24” x 24” x 24”

53” x 60” x 47½”

6750C

400

1/3

10”

Single

18

+ 0.3%

+ 50C

102 min

IB- 525

24” x 36” x 24”

49” x 68” x 43½”

5250C

400

1/3

8”

Single

12

+ 0.3%

+ 40C

109 min

IB- 675

24” x 36” x 24”

53” x 72” x 47½”

6750C

400

1

10”

Single

18

+ 0.3%

+ 50C

111 min

IC- 525

36” x 36” x 36”

61” x 66” x 55½”

5250C

600

1/3

8”

Single

18

+ 0.3%

+ 40C

115 min

IC- 675

36” x 36” x 36”

65” x 70” x 59½”

6750C

600

1

10”

Single

24

+ 0.3%

+ 50C

129 min

ID- 525

36” x 48” x 36”

61” x 78” x 55½”

5250C

600

1

8”

Single

18

+ 0.3%

+ 40C

130 min

ID- 675

36” x 48” x 36”

65” x 82” x 59½”

6750C

600

10”

Single

24

+ 0.3%

+ 50C

143 min

Specification 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 motor starter and heating element off heaters if power to blower is interrupted and to permit operation of blower without heat for cooling. Incoloy sheathed tubular heating elements. The 6750C models have a heat chamber high limit controller. 
Two (2) reinforced 100 lbs. uniformly distributed load capacity stainless steel wire shelves. Trilite Green enamel painted aluminized steel exterior Insulated with 2" of 10500C insulating block backed up with 6750C industrial rockwool
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 assure positive door seal the inner high temperature gasket seals directly against the door plug outer atmosphere gasket seals directly against the front face of the oven.
Inert Atmosphere Ovens

ADDITIONAL EQUIPMENT AVAILABLE
· Additional shelves 100 lbs. distributed load per shelf 400 lbs. maximum oven load specify oven model when ordering.
· Programmable Temperature Controller, microprocessors 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 end of set time ................................................................................... DTS3
· Shut Down Timer, with continuous "hold" feature 1.5, 10 o hour range ................................................................................ SDT
· Batch Timer, for uniformly timing batch operations. Continuous alarm with door interlock. Alarms at end or preset time period until door is opened or timer reset 1.5 10 or 0 hour range.......................................................................................................... BT
· Automatic Door Switch turns off blower and heat when door is opened. Restores blower and heat when door is closed...ADS
· Integral Oven Legs, with ½ " steel plate shelf. 24" high on IA and IB series, 16" high on IC and ID series.........................ISTND
· Removable Oven Stand, with 1/8" steel plate shelf. 24" high on IA and IB series, 16" high on IC and ID.........................RSTND
· 500 lbs. Capacity Stainless 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


 

SHIRSAT ELECTRONICS

 

133, Deewan Ind. Estate No.6, Navghar, Vasai (East),  

Dist: Thane – 401 210. INDIA.  

Tel : 91-250-392946 , 91-250-390793

Email : sakav@vsnl.com