DRETOP QVK-36-12P Box-Type Vacuum & Controlled Atmosphere Muffle Furnace
| Brand | DRETOP |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Box-Type Furnace |
| Maximum Temperature | 1200 °C |
| Temperature Control Accuracy | ±1 °C |
| Rated Power | 9000 W |
| Internal Chamber Dimensions | 400 × 300 × 300 mm |
| Nominal Volume | 36 L |
| Heating Element | Nickel-Chromium Alloy |
| Control System | Microcomputer-Based AI PID Controller with Programmable Ramp/Soak Profiles |
| Vacuum Performance | Ultimate Vacuum ≤ −0.1 MPa (100 Pa) |
| Operating Pressure Range | 10–1000 mbar (gauge), with positive pressure capability up to 0.5 atm (0.05 MPa) |
| Safety Features | Over-Temperature, Over-Pressure, Over-Current, Ground Fault, Thermocouple Failure Detection, Password-Protected Parameter Lock |
Overview
The DRETOP QVK-36-12P is a benchtop-scale box-type muffle furnace engineered for high-precision thermal processing under vacuum or controlled gas atmospheres. It integrates dual functionality—vacuum evacuation and inert/reducing gas purging—enabling oxidation-free annealing, sintering, brazing, degassing, and heat treatment of sensitive materials. Unlike conventional air-fired furnaces, the QVK-36-12P operates in sub-atmospheric environments (down to 100 Pa) or regulated partial pressures (10–1000 mbar), eliminating surface oxidation, decarburization, and contamination during thermal cycles. Its design conforms to fundamental principles of vacuum thermodynamics and gas-phase mass transport, supporting repeatable process outcomes in research-grade metallurgy, advanced ceramics, electronic component fabrication, and functional material synthesis.
Key Features
- Robust double-walled stainless steel construction with high-efficiency ceramic fiber insulation, limiting external surface temperature to <60 °C at maximum operating temperature—enhancing lab safety and energy efficiency.
- Precision-engineered vacuum chamber rated for continuous operation at 1200 °C, with optional pressure cycling between −0.1 MPa (vacuum) and +0.05 MPa (positive pressure) using integrated solenoid valves and digital pressure regulation.
- Microcomputer-based AI PID controller with auto-tuning, multi-segment programmability (up to 30 steps), and real-time profile logging; supports ramp rates from 0.1 to 30 °C/min with soak stability within ±1 °C over 24-hour holds.
- Integrated vacuum system includes a two-stage rotary vane pump (ultimate vacuum ≤100 Pa), analog vacuum gauge, and gas inlet manifold with mass flow controller (MFC)-compatible ports for N₂, Ar, H₂ (with external safety interlock), or forming gas (N₂/H₂).
- Comprehensive safety architecture: independent over-temperature cutoff (K-type thermocouple redundancy), pressure relief valve, ground-fault circuit interrupter (GFCI), short-circuit protection, and password-locked parameter access per GLP-compliant operational protocols.
Sample Compatibility & Compliance
The QVK-36-12P accommodates diverse sample geometries up to 400 × 300 × 300 mm (36 L volume), including crucibles (alumina, quartz, graphite), metal ingots, ceramic green bodies, battery electrode pellets, and semiconductor wafers. It supports ASTM F1529-22 (vacuum heat treatment of titanium alloys), ISO 10474 (steel product certification), and USP particulate matter testing prep via controlled ashing. For GMP/GLP environments, the system’s parameter lock, event-log timestamping, and audit-trail-capable firmware align with FDA 21 CFR Part 11 data integrity requirements when paired with validated software export workflows.
Software & Data Management
While the embedded controller provides standalone operation, optional RS485/Modbus RTU or USB-to-serial interface enables integration with LabVIEW™, MATLAB®, or custom SCADA systems. Process data—including setpoint, actual temperature, chamber pressure, and elapsed time—is logged at user-defined intervals (1–60 s) and exportable as CSV. Firmware supports configuration backup/restore and remote firmware updates via secure authenticated channels. All calibration constants (thermocouple offset, pressure zero drift) are stored in non-volatile memory with write-protection.
Applications
- Non-oxidizing annealing of Cu, Ag, Au, Pt, and Ni-based alloys (e.g., 300–650 °C for recrystallization without surface tarnish).
- Vacuum sintering of oxide ceramics (Al₂O₃, ZrO₂), carbides (SiC, WC), and metal matrix composites at 1100–1200 °C with density >98% theoretical.
- Controlled-atmosphere brazing of stainless steel and Inconel® components using N₂/H₂ mixtures (dew point <−40 °C).
- Thermal decomposition studies (TGA pre-screening), catalyst activation, and residual binder burnout in LTCC substrates.
- Pre-conditioning of reference standards for XRD, SEM-EDS, and dilatometry where surface purity directly impacts measurement fidelity.
FAQ
What is the maximum safe internal pressure during gas-purged operation?
The furnace chamber is rated for sustained positive pressure up to 0.05 MPa (0.5 atm); exceeding this requires external pressure regulation and certified burst discs per ASME B31.3 guidelines.
Can hydrogen be used safely in this model?
H₂ may be introduced only with external explosion-proof hardware (flame arrestors, H₂-specific MFCs, O₂ monitors), mandatory purge-before-heat sequencing, and adherence to NFPA 55 and IEC 60079-10-1 hazardous area classification.
Is the vacuum pump included in the base configuration?
Yes—the standard package includes a 2.5 m³/h two-stage oil-lubricated rotary vane pump with oil mist filter and vacuum hose kit.
How is temperature uniformity validated across the 36 L chamber?
DRETOP provides a factory-as-tested temperature uniformity report (per ASTM E2203) showing ±3 °C deviation at 1200 °C in the central 75% working zone, measured using 9-point thermocouple mapping.
Does the controller support 21 CFR Part 11 compliance out-of-the-box?
The embedded controller meets technical prerequisites (audit trail, electronic signatures, role-based access); full Part 11 validation requires site-specific IQ/OQ documentation and third-party software verification.
