800°C Vacuum Furnace with Lifting Platform

800°C vacuum furnace with metal liner and lifting platform system for precise heat treatment, brazing and annealing under controlled atmosphere.

The system adopts an externally heated, resistance-heated vertical structure, consisting of furnace body, heating system, insulation system and inner liner for reliable high-temperature vacuum operation.
Operating temperature reaches ≥800°C with adjustable heating rate from 5°C/min to 20°C/min, providing flexible process control for various heat treatment requirements.
Cold-state vacuum level is better than 5×10⁻¹ Pa, with pressure rise rate ≤0.6 Pa/h, ensuring excellent chamber sealing and stable vacuum environment during long cycles.
Inert gas can be introduced to maintain slight positive pressure inside the chamber, protecting workpieces from oxidation and contamination during heat treatment.
The furnace body and main structural components are designed for a service life of no less than 10 years, delivering long-term durability and reduced maintenance costs.
Heating elements and insulation layers are arranged to maximize thermal efficiency and temperature uniformity across the working zone, supporting consistent product quality.
Vertical structure saves floor space and facilitates easy loading and unloading of long or bulky workpieces through top or bottom access.
All key parameters including temperature, vacuum level and gas flow are monitored and controlled by the integrated PID system for automated and repeatable operation.

The furnace chamber is constructed from 316L stainless steel, offering excellent corrosion resistance and high-temperature strength for demanding vacuum heat treatment environments.
Upper and lower furnace bodies are made from carbon steel, providing robust structural support and cost-effective durability for the overall frame assembly.
The combination of 316L stainless steel chamber and carbon steel body optimizes both performance and economy, ensuring long service life in corrosive or high-humidity conditions.
316L stainless steel minimizes contamination risks during sensitive processes like brazing or annealing, maintaining clean chamber conditions for consistent product quality.
Carbon steel outer body withstands mechanical stress and thermal expansion, delivering reliable operation under repeated heating and cooling cycles with minimal maintenance.

Each vacuum furnace undergoes a strict 24-hour leakage test using compressed air at 0.098 MPa to verify chamber integrity before shipment.
During the test, the sealed chamber is pressurized and monitored for pressure drop over a full day, ensuring no detectable leaks exist in welds, flanges, or seals.
This extended duration test simulates real-world operating conditions more accurately than short-term checks, guaranteeing long-term reliability under vacuum or inert gas environments.
Passing the 24-hour leakage test confirms the furnace maintains stable vacuum levels during prolonged heat treatment cycles, preventing oxidation and contamination of workpieces.
All units are certified with a leakage rate report upon passing, providing customers with documented proof of quality and compliance with international standards.

Vacuum brazing of stainless steel and copper alloys in automotive and aerospace industries, requiring clean, oxide-free joints and precise temperature control.
Annealing of precision metal parts such as molds and tools under vacuum to eliminate internal stress and improve machinability without surface oxidation.
Sintering of ceramic and cermet materials in controlled atmosphere, utilizing the inert gas backfill function to maintain part purity and dimensional stability.