JSCSeries

2200°f (1200°c) Bell / Shuttle Hydrogen Atmosphere Controlled Retort Furnace


Type Bell / Shuttle
Power Source Electric
Loading Bell
Uniformity AMS Class 2 (± 10ºF / 6ºC)
Atmosphere Inert/Combustible
Lining Brick w/ Fiber Roof

Applications

Description

The JSC SERIES is an electric Bell/Shuttle Lift furnace with a bell type "top hat" alloy low dew point retort. The system normally includes one plug insulated base, one retort, one furnace, one separate insulated "parking" base, and an overhead hoist and shuttle system. The control system, alloy muffle and flow system are completely integrated as one unified system. Any application requiring 100% hydrogen or a mix of hydrogen, or any other combustible atmosphere (as well as any purely inert atmospheres ) may be used in the JSC SERIES. Hydrogen brazing and stainless steel annealing and solution treating are typical examples. Any batch process that can not tolerate oxygen or that requires a low dew point is a candidate for this furnace. Maximum temperature is 2200°F (1200°C) although lower maximum temperatures are recommended for long muffle life. The system is ideal for quick cool down under controlled atmosphere conditions. The round retort holds up well to the stress of heating and cooling and is never moved while hot (unlike horizontal retorts taken in and out of a furnace.)


Processes


Markets

Standard Model Sizes

Our most popular model sizes are listed below. Discuss a custom solution that fits your exact needs by contacting our sales team today.
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LOCKED BY MODEL
Model
#
Internal Dimensions
W
H
D
Outside Dimensions
W
H
D
Std Power
(kW)
Max Load
(Lbs)
Ship Weight
(Lbs)
JSC9999
0
0
0
0
0
0

Additional Features

HEARTH
The top of the insulated plug is designed to take up to the rated load. If a fan is used there is a grid above fan.
DIGITAL PID CONTROL SYSTEM
The standard control is a Honeywell UDC 2500 digital PID 3 mode tuning control. All fuses, transformers, contactors, and controls are housed in a floor mounted NEMA 1 panel. If hydrogen is used then a purged NEMA 12 control panel is standard. Quiet, long life solid state power contactors are standard, but the SCR power control option is recommended (preferably with zoned control for high uniformity.) The thermocouple is Type K and is located inside the retort for accurate control of process temperature. Thermocouple break protection is included. Control voltage is transformed to 120 volts. A NEMA 13 lighted On/Off switch is included. The control circuit and each power branch circuit are fully fused. Honeywell UDC 1200 digital high limit back up control with manual reset, back up contactors and separate thermocouple included. NEMA 1 panels must be connected to a fused power supply. NEMA 12 panels have a fused disconnect switch.
TESTING AND INSTRUCTIONS
The furnace is completely tested in our factory. A complete instruction manual includes easy start up instructions, theory of operation, maintenance instructions, parts list, and detailed trouble shooting guide. A ladder logic diagram, panel layout, general dimension and assembly drawings are prepared on CAD foir 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.
ATMOSPHERE CONTROL
A variety of atmosphere control systems can be provided. See Bulletin H2 which describes the hydrogen flow control system or Bulletin MPH for information on a mixing panel for forming gas. In addition, simple regulators/flowmeters can be provided for inert gas use.
ATMOSPHERE SAMPLE PORT
An alloy sample port is provided. There is a ball valve to close this off when not in use. This is used to sample the atmosphere for oxygen, hydrogen, dew point, etc.
BELL ATMOSPHERE “TOP HAT” RETORT
There is an alloy round atmosphere tight retort designed for combustible or inert low dew point atmospheres. The type of alloy used is dependent on the temperature and application. Inlet and outlet are mounted through the bottom base assembly. The base features an insulation plug which is completely covered with alloy so that no water vapor can get trapped in the insulation and outgas to the chamber. There is a silicone rubber “O” ring seal around the perimeter of the retort. This is cooled by water which runs in an enclosed channel around the perimeter of the base. The retort is secured with quick release bolt down latches. This forms an extremely tight seal and allows very low dew point operation.
FURNACE/RETORT BASE
One base assembly has an insulated retort plug bottom. The retort bell jar cover goes over this plug bottom and gets bolted down to the bottom with swing away quick release clamps. The bottom has all the water cooling channels, thermowells and gas atmosphere connections so that these do not need to move.
“PARKING” BASE
A separate base is provided to “park” the heated furnace.
304 OR 330 STAINLESS ATMOSPHERE RETORT WITH WATER COOLED COOLING ZONE
The work is pushed through a 304 stainless steel (or 330 alloy for optional 2000F unit) retort. This is one continuous 5” O.D. pipe from beginning of the heating zone to the end of the cooling zone. Each end has a sloping counterbalanced vertical door. A half-moon boat contains the load. A stainless steel water jacket with inlet and outlet pipe is welded around the outside of the cooling section. A regulating valve controls the water flow.
INSULATION SYSTEM
The furnace is insulated with 2-1/2” of low K factor refractory firebrick with 2” of backup mineral wool. No asbestos or asbestos products are used.
IRON-ALUMINUM-CHROME ELEMENTS
These are excellent for high temperature applications. An oxide coating protects the element. The elements are supported in proprietary ceramic element holders. These provide perfect support for the coiled element as well as excellent radiating characteristics. The smooth surface prevents premature failure of the element as it expands and contracts. Elements are evenly spaced around the perimeter of the furnace and are zoned.
FURNACE CONSTRUCTION
The furnace is made of polygonal heater sections with a stainless steel wrap around casing. These are supported in heavy metal frame that completely supports and protects these heaters.
BELL/SHUTTLE LIFT DESIGN
The furnace is lifted up by an integral electric hoist which is mounted on a shuttle device. This shuttle device, made of structural steel, shuttles between two separate bases. The movement of the shuttle device is by hand operation. Clamps hold the furnace shuttle in place.

Additional Options

CONTROL, RECORDER AND ELECTRICAL OPTIONS
CONTROL, RECORDER AND ELECTRICAL OPTIONS
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.
ON SITE START UP AND TRAINING
L&L will check out and leak test the atmosphere system, inspect the customer’s assembly of the furnace, check tightness of elements, start up equipment, tune controller, adjust SCR, instruct customer’s personnel in how to do this, train operator in the use of the control systems, review the furnace manual, test for proper operation of all components and systems and start, watch and run the bakeout cycle. This typically takes 2 to 3 days.
TWO TO EIGHT ZONE SCR POWER CONTROL WITH MANUAL BIASING
Digital biasing control is included to adjust relative output of SCRs to adjust temperature uniformity. There are up to 8 separate Zero Fired SCR power controls, one for each zone of heating. This allows you to fine tune the furnace for different temperature points. The SCRs are microprocessor based. The biasing switches have 99 increments.
TWO ZONE SCR POWER CONTROL WITH MANUAL BIASING
Digital biasing control is included to adjust relative output of SCRs to adjust temperature uniformity. There are 2 separate Zero Fired SCR power controls, one for each zone of heating. This allows you to fine tune the furnace for different temperature points. The SCRs are microprocessor based. The biasing switches have 99 increments.
WATER COOLED FAN FOR 2000F OR 2200F
Various water cooled fans made by Industrial Gas Engineering are available. These generally include a vertically mounted fan cartridge assembly for operation up to 2200F. The fan shaft and blade is statically and dynamically balanced. Typically these fans use about one gallon of water per minute for cooling.

Downloads

Brochure For JSC