KJ GROUP VBF-1200X Vertical Tube Furnace (9 L, 1200 °C)
| Brand | KJ GROUP |
|---|---|
| Origin | Liaoning, China |
| Manufacturer Type | Authorized Distributor |
| Equipment Category | Domestic |
| Model | VBF-1200X |
| Instrument Type | Vertical Tube Furnace |
| Max Temperature | 1250 °C (≤1 h), Continuous Operation up to 1100 °C |
| Temperature Uniformity | ±1 °C |
| Power Supply | AC 220 V, 50/60 Hz, 3 kW |
| Heating Rate | Up to 40 °C/min |
| Heating Element | Mo-doped Fe–Cr–Al Resistance Wire with Zirconia Coating |
| Internal Chamber Dimensions | Ø240 mm × 260 mm |
| External Dimensions | 440 mm × 530 mm × 580 mm |
| Net Weight | 30 kg |
| Thermocouple | Type K |
| Certification | CE-compliant |
Overview
The KJ GROUP VBF-1200X is a vertically oriented, high-temperature tube furnace engineered for precision thermal processing in academic laboratories, materials research centers, and industrial quality assurance environments. Unlike conventional box-type muffle furnaces, its vertical geometry enables optimized sample loading/unloading via an upward-opening lid—minimizing heat loss and operator exposure during routine handling. The furnace operates on the principle of resistive heating using Mo-doped Fe–Cr–Al alloy wire elements coated with stabilized zirconia, delivering stable thermal output across extended dwell periods. Its maximum rated temperature of 1250 °C (for short-duration cycles ≤1 hour) and continuous service capability at 1100 °C meet ASTM E1112 and ISO 8573-1 requirements for high-temperature annealing, sintering, and calcination protocols. The dual-layer steel housing and alumina polycrystalline fiber insulation ensure surface temperatures remain below 60 °C under full-load operation—enhancing lab safety and energy efficiency.
Key Features
- Vertical tube configuration with top-hinged access door for ergonomic sample placement and reduced thermal inertia during cycling.
- Dual-shell construction with vacuum-formed alumina polycrystalline fiber insulation and proprietary U.S.-sourced alumina reflective coating to improve radiant efficiency and extend furnace life.
- PID-based 30-segment programmable temperature controller with real-time ramp/soak profiling and auto-tuning functionality.
- High-stability Type K thermocouple embedded in the hot zone for closed-loop feedback control; calibrated traceability available upon request.
- CE-certified design compliant with EN 61000-6-3 (EMC) and EN 61000-6-4 (immunity), supporting integration into GLP/GMP-regulated workflows.
- Integrated cooling water interface (purified or deionized water required) for external jacket circulation—enabling rapid cooldown without compromising element integrity.
Sample Compatibility & Compliance
The VBF-1200X accommodates standard crucibles including alumina (Al2O3) and quartz (SiO2), with internal dimensions (Ø240 mm × 260 mm) supporting sample volumes up to 9 L. It is designed for inert-atmosphere operation (e.g., argon ≥99.99% purity) using a 6 mm double-ferrule compression fitting; optional gas flow controllers and residual oxygen analyzers are available for enhanced process repeatability. While not vacuum-rated, the unit supports positive-pressure purging protocols aligned with ISO 14644-1 Class 8 cleanroom compatibility when installed with appropriate exhaust ducting. Note: Flammable, explosive, or highly corrosive gases (e.g., H2, Cl2, H2S) require prior consultation—customized corrosion-resistant lining treatments can be applied upon specification.
Software & Data Management
The furnace integrates with optional PC-based control software compatible with Windows 10/11, enabling remote monitoring, data logging at user-defined intervals (down to 1 s resolution), and export to CSV or Excel formats. Audit trails include timestamped setpoint changes, actual temperature profiles, alarm events, and operator IDs—supporting compliance with FDA 21 CFR Part 11 requirements when deployed with validated electronic signatures. All firmware updates are delivered via secure HTTPS channels and retain full backward compatibility with legacy configurations.
Applications
- High-purity metal and ceramic sintering (e.g., TiO2, Y2O3, SiC) under controlled inert atmospheres.
- Thermal annealing of thin-film substrates and semiconductor precursors requiring precise ramp rates and uniform axial temperature gradients.
- Residue ashing and LOI (Loss on Ignition) analysis per ASTM D3175 and ISO 5984 standards.
- Calibration of reference materials and inter-laboratory round-robin testing where thermal stability and reproducibility are critical.
- Pre-treatment of catalyst supports and battery electrode materials prior to electrochemical characterization.
FAQ
What is the recommended ambient operating environment?
The furnace must be installed at elevations ≤1000 m, in ambient temperatures of 25 °C ±15 °C and relative humidity of 55% RH ±10% RH. A dedicated 63 A circuit breaker (AC 380 V, 50 Hz) and verified earth ground are mandatory.
Can this furnace operate under vacuum conditions?
No. The VBF-1200X is not vacuum-rated and lacks sealed flange interfaces. It is intended for positive-pressure inert gas purging only.
How often does the furnace require maintenance?
Routine inspection of heating elements and thermocouple integrity is advised every 200 operational hours. Minor surface microcracking in the alumina fiber lining is normal and may be restored using supplied alumina repair paste.
Is argon the only acceptable process gas?
Argon (≥99.99%) is standard; nitrogen may be used for non-oxidizing applications below 1000 °C. Any reactive or corrosive gas requires engineering review and potential refractory modification.
Does the unit include data export capabilities?
Yes—via optional USB or RS485 interface with configurable logging parameters and export to industry-standard file formats for traceability and reporting.
