RTC LA-306 with double UNLOAD extension 

Click to see larger picture.  |    Click here to see specifications datasheet for the LA-306 with special 30-inch unload extension.

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Factory Reconditioned RTC LA-306 IR Belt Furnaces

At 50-60% of 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.

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 1000°C. 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.

    Click to view movie clips of the RTC LA-306 startup, profiling and cooldown.

Typical RTC LA-306 Furnace Profile at 800°C

Furnace Arrangement

THERMAL PROCESSING
Parameter	RTC LA-306
Load Station	215 mm (8.5 inches)
Entrance Isolation Baffle with Venturi Exhaust	159 mm (6.25 inches)
IR Heating Chamber, Zone 1	168 mm (6.6 inches)
IR Heating Chamber Zone 2	363 mm (14.3 inches)
IR Heating Chamber Zone 3	168 mm (6.6 inches)
Transition Tunnel (with optional Venturi Exhaust)	159 mm (6.25 inches)
CACT Closed Atmosphere Cooling Chamber	1015 cm (40 inches)
Unload Station	215 mm (8.5 inches) /  with extension 9.78 mm (38.5 inches)

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

Specifications for RTC LA-306 Laboratory Furnace

DATASHEET:  
OWNER'S MANUAL:  

NEW!  UPGRADES FROM SINGLE PHASE TO 3-PHASE NOW AVAILABLE

SPECIFICATIONS
Parameter	LA-306
Process Gas	CDA, Nitrogen (-N), Forming Gas with premixed Hydrogen and Nitrogen (-FG)
Control Zones	3 zones
Heating Chamber length	700 mm (27.5 inches)
Cooling Chamber	CACT – CDA or N2 convective and Radiant cooling, exterior fan heat removal.
Belt Speed	25-500 mm/min (1-20 ipm) or 25-1000 mm/min (2-40) ipm (other speeds available)
Conveyor Belt	BNV- 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	1000°C
Electrical	Single 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

SPECIFICATIONS
Parameter	RTC LA-306	Max Connected Power, Current	Operating Current @ 950C
Single Phase Power Curve:   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	14.0 kW, 67.3 14.3 kW, 65,2 14.6 kW, 63.7 15.0 kW, 62.3	39.0 A 38.0 A 36.9 A 36.0 A
3-Phase Power Curve:   Operating Current as a   function of Temperature	208 Vac, 3 ph, 50/60 Hz 220 Vac, 3 ph, 50/60 Hz 380 Vac, 3 ph, 50/60 Hz 415 Vac, 3 ph, 50/60 Hz	14.0 kW, 38.9 14.3 kW, 37.7 14.3 kW, 37.7 15.0 kW, 36.0	26.0 A 25.0 A 25.0 A 23.0 A
Parameter	Process Section	Typical (CDA exchange rate: 2x) 425 C operation, balanced flow	Typical (N2 exch rate: 3x) 950 C, low O2, 25 sLpm excess flow
Process Gas Supply	Gas 1	80 Lpm @ 5 bar (170 SCFH @ 70 psig)	146 Lpm @ 5 bar (308 SCFH @ 70 psig)
	Gas 2 (Heating Chamber only)	see Gas 1	33 m3/hr @ 5 bar (69 CFM @ 70 psig)
Process Gas Exhaust	Gas 1 + Gas 2	80 Lpm (170 SCFH)	95 Lpm (202 SCFH)
Enclosure Ventilation	Furnace Cabinet Fan (1) vent to room or facility exhaust system	930 m3/hr @ 30°C (550 cfm @ 86°F)
	Control Cabinet Fans (2) (vents to room)	360 m3/hr @ 30°C (212 cfm @ 86°F)
Dimensions	Length	2.59 m (102 inches) / with 30-inch unload extension: 3.35 m (132 in.)
	Width	0.46 m (18 inches)
	Height	1.64 m +/- 0.0254 (62.25 inches +/- 1.0)
	Adjustable Conveyor Height	965 mm +/- 25.4 (38 inch +/- 1.0)
Weight	365 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:

POPULAR OPTIONS
Code	Description	Code	Description
NO	Nitrogen Operation, Dual Gas (N2 & FG)	OA	Oxygen Analyzer
LT	Process Ready Light Tower	MA	Moisture Analyzer
AFR	Coalescing Air Filter & Regulator	CB	Circuit Breaker