GLF Series Electric Box Furnace
The GLF series electric box furnaces are capable of reaching 2,500°F (1,371°C). These medium-sized furnaces are designed for high-temperature applications involving high speed tool steels and technical ceramics. With SCR controlled heating elements and rapid heat-up times, the GLF series offers precise control and uniform temperature distribution, making it a reliable choice for high-temperature processing.
- Power Type:Electric
- Available Models:10
- Customizable: Yes

What Makes the GLF Series Unique?
The GLF Series Series Electric Box Furnace is designed to deliver unmatched performance and reliability for a variety of demanding heat-treating processes.
- Multiple Processes •
- With silicon carbide elements capable of reaching up to 2500°F, this furnace is perfect for a variety of demanding applications, including high-speed tool steel heat treatment and advanced ceramic processes.
- Even Heating •
- This furnace provides even heating from both above and below the workpiece using silicon carbide elements. This design ensures uniform temperature distribution, making it ideal for applications that require consistent and precise heat treatment throughout the entire load.
- Refractory Vestibule •
- The refractory vestibule provides excellent protection for the heating elements while ensuring a tight door seal. This design minimizes heat loss, enhances energy efficiency, and extends the lifespan of the furnace components, making it perfect for high-temperature applications.
Comprehensive Features for Optimal Performance
The GLF Series comes equipped with a robust set of standard features, carefully selected to ensure efficient and reliable heat treatment processes. For more specialized applications, optional features are available to enhance the machines capabilities and meet your specific requirements.
Standard Features
All standard features included on GLF Series
- Furnace Type
- Box
- Chamber Size
- Medium
- Max Temperature
- 2500ºF / 1371ºC
- Chambers
- Single
- Chamber Circulation
- Natural Convection
- Chamber Insulation
- Firebrick
- Roof Insulation
- Ceramic Fiber Modules
- Door Type
- Horizontal
- Element Type
- Silicon Carbide
- Hearth Type
- Ceramic Plate
- Hearth Support
- Firebrick Piers
- Atmosphere Type
- Ambient Air
- Control Panel Type
- Free Standing
- Control Voltage
- 120 VAC
- Temperature Controller
- Single Temperature
- Element Power Controller
- Digital SCR Control
Optional / Upgrade Features
Optional and upgraded features available on GLF Series
- Door Type
- Vertical (Electric), Vertical (Pneumatic)
- Atmosphere Type
- Inert
- Atmosphere Control
- Manual Rotameter, Automatic Rotameter, Mass Flow Control
- Atmosphere Seal
- Basic
- Control Voltage
- 24 VDC
- Temperature Controller
- Basic Programmer, Advanced Programmer, PLC
- AMS Compliance
- AMS2750
- Data Recorder
- Addon
- Signal Tower
- Addon
- High Powered Heating Elements
- Addon
- Heat Shields
- Addon
GLF Series Standard Model Sizes
The GLF Series is available in a range of standard sizes to accommodate various load dimensions and production requirements. As with most L&L furnaces, custom sizes are available upon request. To inquire about custom sizes, please contact our sales team .
| Model Name | Working Dimensions | Interior Dimensions | Exterior Dimensions | Max Power | Max Load | Total Weight | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| W | H | D | W | H | D | W | H | D | kW | Lbs | Lbs | |
| GLF 524 | 15 | 15 | 24 | 17 | 27 | 26 | 70 | 61 | 50 | 30 | 175 | 2,000 |
| GLF 814 | 18 | 12 | 24 | 21 | 24 | 26 | 73 | 58 | 50 | 30 | 225 | 2,200 |
| GLF 824 | 18 | 18 | 24 | 21 | 30 | 26 | 73 | 64 | 50 | 37 | 225 | 2,600 |
| GLF 836 | 18 | 18 | 36 | 21 | 30 | 38 | 73 | 64 | 62 | 47 | 325 | 3,200 |
| GLF 236 | 24 | 18 | 36 | 27 | 30 | 38 | 79 | 64 | 62 | 54 | 450 | 3,800 |
| GLF 244 | 24 | 24 | 24 | 27 | 36 | 26 | 79 | 70 | 50 | 50 | 300 | 3,600 |
| GLF 248 | 24 | 24 | 48 | 27 | 36 | 26 | 79 | 70 | 74 | 80 | 600 | 5,500 |
| GLF 3636 | 36 | 36 | 36 | 39 | 58 | 38 | 91 | 82 | 62 | 95 | 675 | 7,000 |
| GLF 3648 | 36 | 36 | 48 | 39 | 48 | 50 | 91 | 82 | 74 | 114 | 900 | 8,200 |
| GLF 3672 | 36 | 36 | 72 | 39 | 48 | 74 | 91 | 82 | 98 | 180 | 1,350 | 9,600 |
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