TB1248

TB Series 2100°F (1150°C) Ceramic Fiber Lined Split Tube Furnaces

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LOCKED BY SERIES
Type Tube
Power Source Electric
Loading Horizontal Tube
Uniformity AMS Class 5 (± 25ºF / 14ºC)
Atmosphere Air
Lining Ceramic Fiber

Applications

LOCKED BY SERIES

Description

The TB SERIES Bench Mounted Electric Tube Furnaces feature even heating around the perimeter of the tube, ceramic fiber insulation, and split tube construction for easy changing of the tubes. A variety of tubes may be used or supplied by L&L depending on the application. The sizes listed in the specification sheet are easily modified to suit various applications. The TB Series is normally limited to 2100°F (1150°C.) Elements are rated for 2200°F (1200°C.)


Processes


Markets

Specifications

Dimension
W
H
D
External
27
33
56
Tube Diameter 12
* All dimensions in inches unless otherwise specified.
Power
Standard Pwr 24
Max Temp (°F) 2100
Element Size 14
Element Heated Length 48
* All power values in KW unless otherwise specified.
Weight
Ship Weight 800
* All weights in Lbs unless otherwise specified.


Additional Features

DIGITAL PID CONTROL SYSTEM
The standard control is a Honeywell UDC 2500 digital PID 3 mode tuning control with two displays. All fuses, transformers, contactors, and controls are located in a NEMA 1 panel. (NEMA 12 panels with fused disconnects are optional). Quiet, long life solid state power contactors are standard; SCR power controls are optional. The thermocouples are Type K. Thermocouple break protection is included. Limit switches shut off furnace power if the door is opened or the element cover plate is removed. Control voltage is 120 volts. The control circuit and each power branch circuit are fully fused. A NEMA 13 lighted On/Off switch is included. Customer must connect fused power supply to single point on panel.
TESTING AND INSTRUCTIONS
The furnace is power tested to insure proper watt ratings. The controls are fully calibrated and the control system completely tested. A complete instruction manual includes easy start up instructions, theory of operation, maintenance instructions, parts list, general dimension drawing, general assembly and subassembly drawings where required, and a detailed trouble shooting guide. A ladder logic diagram and panel layout are prepared on CAD for easy readability.
WARRANTY
The furnace is warranted for one year except for elements and thermocouples which are warranted for six months. See warranty sheet Q12W.
LOW MASS INSULATION
The furnace is insulated with 6 inches of low “K” factor ceramic fiber and mineral wool insulation. Two inches of this insulation consists of a removable molded element/insulation module that lines the interior of the furnace. It is not brittle and so maintenance is minimal. The insulation has a very low thermal mass and hence heats up very quickly. Heat up to 1800F (980C) will take approximately 45 minutes. No asbestos is used.
CERAMIC FIBER MOLDED ELEMENTS
Elements are embedded in ceramic fiber and are made of iron-aluminum-chrome alloy. The elements are preoxidized (which is what protects this alloy from the high temperatures.) Element sections are replaced easily. The elements are evenly spaced along the entire surface of the interior and hence will provide the maximum in temperature uniformity by uniformly radiating along the entire surface of the tube. The insulation is fitted with vestibules at both ends. These protect the elements and help hold the tube in place. They hold heat in around tube. The vestibules split open with the furnace case. Elements are rated for 2050F (1100C.)
BENCH MOUNTED CASE CONSTRUCTION
The furnace case is constructed of welded 10 and 14 gauge steel. There is a detached control panel that contains all controls, control components and power supply. The case is primed with 800F silicone paint and finished in machine enamel. The hinged case splits open in the center from one side and latches closed on the other side.

Additional Options

ANGLE IRON FLOOR STAND
Includes braced angle iron legs with leveling bolts.
ATMOSPHERE CONTROL
Inert atmosphere and combustible atmosphere systems are both available. See H2 (hydrogen) and MPH (forming gas - hydrogen/nitrogen mix) which explain the various safety systems for hydrogen and forming gas atmospheres.
CONTROL, RECORDER AND ELECTRICAL OPTIONS
CONTROL, RECORDER AND ELECTRICAL OPTIONS
HIGH UNIFORMITY OPTION
See The TBU Bulletin
JIC CONTROL OPTION
This includes a NEMA 12 control cabinet, all oil tight switches and a panel mounted fused disconnect switch. Zone switches if included are percentage timers.
OVERTEMPERATURE SYSTEM
Honeywell UDC 1200 digital high limit back up control with manual reset, back up contactors and separate thermocouple.
SINGLE ZONE SCR POWER CONTROLLER
A zero fired SCR power control with two-leg control is used instead of contactors. This is constructed with transient voltage protection, sub-cycle fuse protection, extra large heat sinks, and positive zero firing. Gain and bias adjustments are included for tuning.
TUBES AND RETORTS
Alloy retorts made of 304, 330 or 601 alloys, typically with water cooled “O” ring seals as well as ceramic and quartz tubes are available.

Downloads

Brochure For TB