LTG-Low
Temperature Gas Ovens
Gas-Fired Radiant Tube or Open Fired
LTG-1830
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For Tempering Steel or Heat
Treating Aluminum Temperature Range (300° F to 1200° F)
This series of LTG (Low Temperature
Gas) Furnaces was designed for use in tool hardening
shops and metallurgical technology laboratories for tempering,
or drawing hardened parts or dies. It is also suitable for
solution and precipitation treatment of aluminum and other
non-ferrous alloys where extreme accuracy and clean
atmospheres are required.
Tempering operations do not exceed 1200° F
and are below the red heat radiation range, therefore heat is
transmitted to the furnace work load by CONVECTION (passing of
heated air over the work load).
The models LTG-1824 and LTG-1830 are
radiant tube style furnaces where the burner is contained in a
stainless steel tube and exhausted out the rear of the
furnace. This keeps combustion by-products from being
introduced into the work chamber, thereby providing a clean
atmosphere for heat treating aluminum.
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FURNACE
MODEL |
DOOR
|
CHAMBER
|
OVERALL
|
HEARTH
|
VOLTS
|
Ph.
|
FLOOR
SPACE |
APPROX.
WEIGHT |
|
LTG-1824 |
|
|
|
|
240/480
|
3
|
42w x 33d |
1,040 lbs. |
|
LTG-1830 |
|
|
|
|
240/480
|
3
|
42w x 39d |
1,763 lbs. |
FURNACE CONSTRUCTION
The furnaces are constructed of heavy
steel, reinforced with structural members and welded for
rigidity. Simplified design permits quick removal or
replacement of furnace components. The furnace top plate,
including the fan assembly, can be removed to expose the
heating tube and work chamber.
BURNER SYSTEM
The gas-fired radiant tube assembly bolts
to the furnace back plate and can be removed easily for
inspection or maintenance. The tube is heated by a
proportioning gas/air burner that can be adjusted for any type
of fuel gas. Automatic spark ignites the pilot which is
continually monitored by an ultra-violet scanner. The air
supply is controlled by a motorized butterfly air valve.
CIRCULATING FAN
The belt driven stainless steel circulating
fan and fan shaft utilize standard self aligning pillow block
bearings to assure long trouble free operation and to
facilitate servicing. The motor is a standard "C" flange ball
bearing motor with overload protection. The fan shaft heat
slinger, mounted below the lower bearing, prevents excess
shaft and bearing temperatures. The dual belt drive is
protected by a sheet metal guard. On the larger units, a water
cooled bearing system is utilized. Included with these units
is a self contained coolant system that requires no water or
drain lines be connected to the furnace.
COMBUSTION SAFEGUARD
MIFCO furnishes an Ultra-Violet Control
System that is activated by the ultra-violet rays emitted by a
spark or flame. Ignition is automatic by high intensity spark
at start up. In the event of flame failure, for any reason,
the flame scanner closes the gas solenoid valve immediately
and purges the system. Manual reset is then necessary to
restart the furnace.
AUTOMATIC TEMPERATURE CONTROL SYSTEM
Standard temperature control systems
consist of digital readout, micro-processor based controllers
mounted in a separate control panel. All control panels are
completely wired, ready for immediate installation.
V arious
programmable and recording instruments can be supplied. Some
will require special control panels.
Operating the LT Series Low Temperature
Furnace, equipped with Automatic Temperature Control and the
FM Combustion Safeguard System is extremely simple. Just press
the start button on the control panel and enter the set point
on the control instrument. Ignition and operation is
completely automatic with maximum safety.
TEMPERATURE UNIFORMITY
The
LTG Convection series is a tempering or drawing furnace with
high velocity recirculating fan. It continually bathes the
work load with evenly distributed, high velocity air, held to
a constant temperature. Built to industrial standards, the
furnace will meet the most critical metallurgical requirements
for tool room or laboratory and has excellent temperature
uniformity.
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