Heating furnace L, LT 5/14

laboratorymufflestainless steel

Overview
Heating elements mounted on support tubes radiating freely into the furnace chamber enable particularly short heating times. The L / LT muffle furnace series is rated to a maximum temperature of 1400 °C and is designed for laboratory and light industrial thermal processes requiring fast heating or elevated application temperatures. This series is an alternative to the L(T) ../12 models when shorter cycle times or higher temperatures are required.

Standard equipment

• Maximum temperature: 1400 °C
• Dual-sided heating for improved temperature distribution
• Heating elements on support tubes for free radiation and long service life
• Insulating materials without classification under EC Reg. No. 1272/2008 (CLP)
• Double-wall stainless steel textured housing with additional cooling to limit external surface temperature
• Adjustable air inlet integrated in the door
• Exhaust outlet at rear of furnace
• Touch controller B510 (5 programs × 4 segments)
• Quiet heating operation using solid-state relays
• NTLog Basic for Nabertherm controllers: process data recording via USB stick

Optional equipment

• Exhaust chimney (with or without fan) or catalytic converter
• Adjustable over-temperature limiter to protect furnace and load
• Protective gas connection for purging with non-flammable process gases (non gas-tight; not combinable with certain exhaust configurations)
• Manual or automatic gas supply systems
• Process control and documentation via VCD software package

Technical specifications (excerpt)
Model | Tmax (°C) | Inner dimensions (mm) W / D / H | Volume (l) | Outer dimensions (mm) W / D / H | Temperature uniformity ±5 K | Connected load (kW) | Electrical connection | Weight (kg) | Heating time (min)
L, LT 5/14 | 1400 | 225 / 175 / 130 | 5 | 490 / 450 / 580+320 | 170 | 2.6 | single-phase | 42 | 45
L, LT 9/14 | 1400 | 250 / 250 / 170 | 9 | 530 / 525 / 630+350 | 180 | 3.5 | single-phase | 55 | 50
L, LT 15/14 | 1400 | 250 / 350 / 170 | 15 | 530 / 625 / 630+350 | 180 | 3.5 | single-phase | 63 | 70

Technical notes
Recommended working temperature for prolonged holding times: 1300 °C. External dimensions may vary with options; dimensions available on request. Heating times are approximate values for an empty, closed furnace up to Tmax −100 K (e.g., connected to 230 V 1/N/PE). Temperature uniformity ±5 K measured with air inlet closed in empty workspace according to DIN 17052-1 at working temperatures above 800 °C. Connected load refers to the standard configuration and may increase with additional equipment.

Applications

• Laboratory heat treatment and material testing
• Sintering, annealing and stress-relief cycles
• Ashing and conventional laboratory heating programs

Features / technical highlights

• Maximum operating temperature 1400 °C
• Fast response due to heating elements on support tubes and free radiation
• Dual-sided heating for improved homogeneity
• Double-wall stainless steel housing with cooling to limit surface temperature
• B510 touch controller with program segments and USB data logging (NTLog Basic)
• Optional exhaust systems, over-temperature protection, protective gas purge and gas supply systems