OTF-1200X-S-VT-5 Vertical Quartz Tube Furnace with Vacuum-Sealed Stainless Steel Flanges
The OTF-1200X-S-VT-5 is engineered for laboratory applications requiring rapid and precise heating of samples within a controlled atmosphere. Its vertical quartz tube design supports vacuum or flowing gas environments, making it suitable for thermal treatments such as quenching and material modification. The furnace accommodates a 5-inch diameter fused quartz tube, providing a controlled environment for sensitive processes.
This model integrates stainless steel vacuum flanges equipped with vacuum gauges and valves, enabling secure sealing and monitoring of vacuum levels down to 10-5 Torr with appropriate pumps. The furnace’s temperature controller allows programming of up to 30 segments for heating, cooling, and dwell times, maintaining temperature stability within ±1°C. Its maximum temperature reaches 1200°C, with continuous operation up to 1100°C.
Key Features
- Vertical tube furnace with 5″ fused quartz tube (130 mm OD × 120 mm ID × 750 mm length)
- Maximum temperature of 1200°C with continuous operation at 1100°C
- Double-layer steel casing with air cooling and high-purity Al2O3 fibrous insulation for energy efficiency
- Stainless steel vacuum flanges with integrated vacuum gauge and valves for secure vacuum sealing
- Programmable temperature controller with 30 segments, PID auto-tune, and ±1°C accuracy
- Heating element made of Mo-doped Fe-Cr-Al alloy for reliable performance
- Optional accessories include different flange sizes, feedthrough ports, and advanced vacuum fittings
Technical Specifications
| Parameter | Specification |
|---|---|
| Maximum Temperature | 1200°C (reached in less than 1 hour) |
| Continuous Operating Temperature | 1100°C |
| Heating Rate | Up to 15°C/min |
| Tube Dimensions | Fused quartz tube, 130 mm OD × 120 mm ID × 750 mm length |
| Heating Zone Length | 300 mm (single zone) |
| Constant Temperature Zone | 100 mm ± 2°C |
| Power | 3 kW |
| Voltage | 208–240 VAC, Single Phase, 50/60 Hz |
| Temperature Controller | Programmable 30 segments, PID auto-tune, over-temperature protection, ±1°C accuracy (Eurotherm 3000 option ±0.1°C) |
| Heating Elements | Mo-doped Fe-Cr-Al alloy |
| Vacuum Sealing | Two stainless steel flanges with vacuum gauge and valves; hook ring inside top flange for sample suspension |
| Vacuum Level | 10⁻² Torr (mechanical pump), 10⁻⁵ Torr (turbopump) |
| Fitting Ports | Standard 1/4″ barbed fittings with needle valves; optional 304SS Swagelok® or KF25 adapters available |
Typical Applications
This vertical quartz tube furnace is well suited for quenching tests, thermal annealing, and material synthesis under vacuum or controlled gas atmospheres. It can be adapted for chemical vapor deposition (CVD) and physical vapor deposition (PVD) coating processes, as well as vapor phase polymerization and fluidized bed applications with additional modifications.
Configuration & Operating Notes
The furnace includes vacuum-sealed stainless steel flanges with integrated gauges and valves. Optional accessories such as smaller flanges with feedthrough ports, advanced vacuum fittings, digital vacuum gauges, and flow meters can be ordered separately to enhance functionality. For safe operation under vacuum and low-pressure conditions (below 0.2 bar), a two-stage pressure regulator must be installed on gas cylinders to limit pressure below 3 PSI. The quartz tube is rated for use up to 1000°C under vacuum pressures. The furnace casing features a double-layer steel structure with air cooling and high-purity alumina insulation for energy efficiency.
