LCI for low prices on low operating cost, high efficiency OEM Furnaces:  LA-Series or Laboratory Series Models, including return of the popular compact LA-306 (new updated design) and versatile LA-309, LA-309X; replaces RTC LA-304, LA-310 and LA310X laboratory (lab) production continuous atmosphere high temperature 1000C infrared belt furnaces.

Factory Refurbished RTC LA-306 IR Belt Furnaces

At 50-60% the price of a new LA-306, we have a limited number of refurbished RTC LA-306 furnaces in stock and a few more in the warehouse available for reconditioning in our factory.  Or we can reconditon your LA-306 furnace with new digital controllers, electronics and lamps including replacement of any missing, damaged or necessary worn parts. These units are fully tested to original RTC factory specifications and are warranteed for one year from shipment.  These furnaces are offered in conjunction with RGL Enterprises.

LA-306 New Control Console

LCI Refurbished LA-306 Control Console (View panel ON).  All new electronics with digital controls.   >> Go to Control Console page.

Compact High Temperature Infrared Thermal Processing Belt Furnace

True near-infrared furnace.  The LA-306 is a compact high temperature production and laboratory infrared furnace. The small 6 inch wide chamber offers excellent temperature control and rapid rise to 1000C. Process atmosphere is controlled much like a clean room: pressurized gas is pushed through the heating chamber insulation providing a pre-heated, laminar flow for a uniform, stable atmosphere. Precise temperature is maintained by control thermocouples above the belt in each zone quickly sensing changing conditions. IR quartz heating lamps inside the chamber instantaneously adjust their output to achieve tight temperature control: each load through the furnace sees the same temperature. The small size and furnace chamber assures good temperature control with efficient use of power and proces gas.  The LA-306 furnace can be configured for one gas (CDA, Nitrogen) or dual gas operation (nitrogen and forming gas).

The furnace is operated via individual digital PID controllers to control the temperature in each zone.  For efficiency and smooth control, phase-angle fired SCR's are used to power the lamps.

Process Applications

The LA-306 can process substrates, wafers, PCBs, metal, ceramic, glass or polycarbonate parts for Package Sealing, Epoxy Die Attach, Polymer Curing, Reflow Soldering, Hybrid/Thick Film Firing, General Thermal Processing, Brazing, Annealing, Tempering and  Metal Sintering applications.  This furnace is popular for use dental labs and dental production applications.

See movie clips of the RTC LA-306 startup and profiling.

RTC LA-306 High Temperature Profile

Typical RTC LA-306 Furnace Profile at 800C

Furnace Arrangement

Parameter RTC LA-306
Load Station 215 mm (8.5 inches)
Entrance Isolation Baffle with Venturi Exhaust160 mm (6.25 inches)
IR Heating Chamber, Zone 1170 mm (6.6 inches)
IR Heating Chamber Zone 2365 mm (14.3 inches)
IR Heating Chamber Zone 3170 mm (6.6 inches)
Transition Tunnel (with optional Venturi Exhaust)160 mm (6.25 inches)
CACT Closed Atmosphere Cooling Chamber1015 cm (40 inches)
Unload Station215 mm (8.5 inches)

Typical RTC LA-306 Furnace Entrance, Front View and Furnace Internals

Specifications for RTC LA-306 Laboratory Furnace

DATASHEET:     DataSheet pdf


Parameter LA-306
Process Gas CDA, Nitrogen (-N), Forming Gas with premixed Hydrogen and Nitrogen (-FG)
Control Zones3 zones
Heating Chamber length700 mm (27.5 inches)
Cooling ChamberCACT – CDA or N2 convective and Radiant cooling, exterior fan heat removal.
Belt Speed25-500 mm/min (1-20 ipm) or 25-1000 mm/min (2-40) ipm (other speeds available)
Conveyor BeltBNV- low mass, stabilized Nichrome-V
Belt Size, nominal width 150 mm (6 in.)
Exhaust Improved venturi exhaust stacks to reduce process gas consumption.  Number of stacks vary with process requirements.
Temperature Capacity, max 1000C
ElectricalSingle phase design.  All models include universal transformers which accommodate 208-240 Vac and 50/60 Hz frequency anywhere in the world, allowing furnace relocation without external equipment. IR lamp controls automatically keep IR spectrum constant.

Facility Requirements 

Parameter RTC LA-306Standard Model (max power, Current)HiPower Model (max power, current)
  Operating Current as a
  function of Temperature
208 Vac, 1 ph, 50/60 Hz
220 Vac, 1 ph,  50/60 Hz
230 Vac, 1 ph, 50 Hz (EU)/60 Hz
240 Vac, 1 ph,  50/60 Hz
13.8 kW, 66.5 A
14.2 kW, 64.4 A
14.5 kW, 62.9 A
14.8 kW, 61.6 A
17.2 kW, 82.6 A
17.2 kW, 78.1 A
17.2 kW, 74.7 A
17.2 kW, 71.6 A
ParameterProcess SectionTypical (CDA exchange rate: 2x)
425 C operation, balanced flow
Typical (N2 exch rate: 3x)
950 C, low O2, 25 sLpm excess flow
Process Gas SupplyGas 187 Lpm @ 5 bar
(185 SCFH @ 70 psig)
69 Lpm @ 5 bar
(145 SCFH @ 70 psig)
Gas 2 (Heating Chamber only)see Gas 1
33 m3/hr @ 5 bar
(69 CFM @ 70 psig)
Process Gas ExhaustGas 1 + Gas 2100 Lpm
(212 SCFH)
76 Lpm
(161 SCFH)
Enclosure VentilationFurnace Cabinet Fan (1)
vent to room or facility exhaust system
930 m3/hr @ 30C
(550 cfm @ 86F)
930 m3/hr Lpm @ 30C
(550 cfm @ 122F)
Control Cabinet Fans (2)
(vents to room)
360 m3/hr @ 30C
(212 cfm @ 86F)
360 m3/hr @ 40C
(212 cfm @ 104F)
DimensionsLength2.59 m (102 inches)
Width0.46 m (18 inches)
Height1.64 m +/- 0.0254 (62.25 inches +/- 1.0)
Adjustable Conveyor Height965 mm +/- 25.4 (38 inch +/- 1.0)
Weight370 kg (800 LB)


LA-306 Furnace Standard Features and Options

Standard features are listed on the Standard Features pages (see link below). Popular options include the following:

Code DescriptionCode Description
NONitrogen Operation, Dual Gas (N2 & FG)OAOxygen Analyzer
LTProcess Ready Light TowerMAMoisture Analyzer
AFRCoalescing Air Filter & RegulatorCBCircuit Breaker


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