1000°F AND 1250°F
FRONT-TO-BACK
HORIZONTAL AIR FLOW
INERT ATMOSPHERE OVENS
Inert atmosphere ovens for operation at up to 1250°F. Protect parts from
oxidation using any non-flammable gas such as Nitrogen, Argon or Carbon Dioxide.
Front-to-back horizontal air flow completely surrounds work on shelves or large
parts placed directly on the optional reinforced work space bottom. Includes
cooling jacket which can be equipped with optional cooling blower and automatic
dampers. Installation of optional atmosphere purge solenoid, cooling blower and
programmable temperature controller provides completely automatic sequencing.
Standard Inert Atmosphere 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 hazardous locations, the above organizations require additional safety devices.
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
—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
—0-200 CFH atmosphere flow meter
—Pressure gauge to indicate interior oven pressure
—Inert atmosphere outlet with pressure relief
—Air jacket on inner oven for cooling
—Front-to-back horizontal air flow
—16 gauge 304 stainless steel interior
—Aluminized steel exterior with enamel finish
—Brushed stainless steel control panel face
—Insulated with 2" thick 1900°F 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
SPECIFICATIONS Back
to Top NOT FOR USE WITH FLAMMABLE SOLVENTS, VAPORS OR GASES.
†Accuracy as percent of controller span. Uniformity at 100°F
below maximum temperature. Rise Time in minutes to 100°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
— 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, top 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. The 1250°F models have a heat chamber high
limit controller.
Two (2) reinforced 100 lbs uniformly distributed load capacity, stainless steel
wire shelves. Models IA and IB will hold seven(7) shelves on 3" centers; models
IC and ID five(5) shelves on 6" centers.
Trilite Green enamel painted aluminized steel
exterior. Insulated with 2" of 1900°F insulating block backed up with 1250°F industrial rockwool.
Inert atmosphere is introduced at blower shaft (1/2" NPT) and positive oven
pressure maintained by inlet pressure regulator. Atmosphere flow indicated
on
0-200 CFH flow meter. Oven pressure indicated on 0-5 inch 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 against the front face of the oven.
Circulation Diagram
(Top View)
ADDITIONAL
EQUIPMENT AVAILABLE Back
to Top See
Bulletin TC-960 for modifications and other
optional equipment.
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 Option PTC3
Recording Thermometer,
thermocouple actuated, 24-hour, 10" diameter circular chart used in
conjunction with standard controller (side mounted) Option RT
Programmable Recording
Temperature Controller, microprocessor based, thermocouple actuated,
digital display, 24-hour, 10" diameter circular chart, in lieu of
standard controller (side mounted) Option 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 Option DTS3
Shut Down Timer,
with continuous "hold" feature; 1, 5, 10 or 30 hour range Option SDT
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 Option BT
Automatic Door
Switch, turns off blower and heat when door is opened. Restores
blower and heat when door is closed Option ADS
Integral Oven
Legs,
with 1/8" steel plate shelf. 24" high on IA and IB Series, 16" high on
IC and ID Series Option ISTND
Removable Oven
Stand, with 1/8" steel plate shelf. 24" high on IA and IB Series,
16"
high on IC and ID Series Option RSTND
500 lbs Capacity
Stainless Steel Subway Grating, oven work space bottom. Reduces
work space height by 1". Specify oven model when ordering. Option SSUB
Automatic Purge,
opens oven outlet automatically to purge air from oven, requires installation
of optional programmable temperature controller Option APS
Cooling Blower,
connected to air jacket to provide accelerated cooling, includes 2-position
motorized dampers, requires installation of optional programmable temperature
controller Option CB
Oven
Model
Capacity
HP
Outlet
Dia
Approx Cooling
to 250°F from
1000°F
1250°F
IA
325
CFM
1/3
6"
95
min
110
min
IB
650
CFM
1/2
6"
60
min
70
min
IC
975
CFM
1
8"
80
min
100 min
ID
975
CFM
1
8"
110 min
130 min
Modulating
Dampers, to regulate cool down rate,
replaces 2-position dampers included with cooling blower. Includes
heating/cooling
programmable temperature controller in lieu of optional programmable temperature
controller required with cooling blower Option MD
UL LISTED CONTROL
PANEL
