Large-Scale Tubular Atmosphere Vacuum Furnace

• Customization: Available
• After-sales Service: on-Line Service
• Warranty: One Year
• Model NO.: RJ-VAH1200-20TIF
• Application: Industry, School, Hospital, Lab
• Customized: Customized
• Structure: Desktop
• Material: Steel
• Type: Tubular Furnace
• Transport Package: Wooden Case
• Specification: Customized
• Trademark: RJ
• Origin: Zhengzhou, China

Product Description

Large-Scale Tubular Atmosphere Vacuum Furnace
The VAH Large-Bore Atmosphere Vacuum Furnace is designed for high-purity material preparation under controlled environments. It features annular heating elements uniformly arranged around a high-purity quartz vacuum chamber, ensuring high thermal efficiency, rapid heating, and excellent temperature uniformity. A protective gas circulation system (front-in/rear-out) and high-temperature-resistant seals (water-cooled stainless steel) guarantee safety and reliability. The system offers fully automated touchscreen operation with over-temperature, thermocouple failure, and low-water-pressure alarms.

 

Key Features

1. Double-Layer Insulation: Air-cooled interlayer for enhanced thermal management.
2. Energy Efficiency: High-purity Al2O3 fiber refractory lining minimizes heat loss.
3. Extended Lifespan: Alumina-coated refractory chamber resists degradation.
4. Customizable Gradient: High-purity quartz plugs enable user-defined temperature gradients.
5. Safety Protections: Over-temperature, thermocouple failure, cooling-water interruption, and leakage alarms.
6. Modular Design: Interchangeable thermocouple ports and observation windows (optional).

 

Technical Specifications

Category	Parameter	Details
Model	RJ-VAH1200-20TIF
Electrical	AC 220V, 4 kW
Max. Temperature	≤1150°C (reachable in <1 hour)	Long-term range: 300-1150°C
Heating Rate	1°C/h - 20°C/min	Programmable via touchscreen
Heating Zone	Ø190 mm × 200 mm	Double-layer partition
Temperature Uniformity	±1°C	Verified by thermal field curve (see diagram)
Vacuum Level	≤10 Pa (mechanical pump)
Net Weight	20 kg

 

Control System

• Touchscreen Interface: 7-inch color display with Chinese/English bilingual GUI.
• Programmable Profiles: Stores 15 temperature curves for repeatable processes.
• Real-Time Monitoring: Non-linear temperature correction and safety alerts.

Heating Elements

• Material: Mo-doped Fe-Cr-Al alloy heating rings.
• Advantage: Uniform thermal distribution, durable at high temperatures.

Gas & Vacuum System

• Gas Flow Control: Mechanical pressure gauge (sealed, corrosion-resistant) + rotameter (pre-calibrated).
• Sealing: High-temperature silicone O-rings with water-cooling for >1000°C operation.

 

Safety Guidelines

1. Pressure Limit: Chamber pressure must not exceed 0.15 MPa (absolute) to avoid structural damage.
2. Vacuum Use: Temperature ≤1000°C in vacuum mode.
3. Gas Supply: Always use a pressure-reducing valve (recommended range: 0.01-0.15 MPa).
4. High-Temp Caution:
   • Avoid vacuum state when >1000°C; maintain atmospheric pressure.
   • Quartz tube max. temperature: 1150°C (continuous use at ambient pressure).
5. Cooling Requirement: Water chiller mandatory for high-temperature sintering to protect seals.
6. Material Restrictions: Avoid alkaline-ion-containing samples to prevent chamber crystallization.

 

Service & Warranty

• 2-Year Limited Warranty: Covers non-consumable parts (excludes quartz tubes, O-rings, etc.).
• Lifetime Technical Support: Post-warranty assistance available.