JB-Brookfield JB-4000 Oxygen Bomb Aging Test Chamber
| Brand | Jiubin Instruments |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | JB-4000 |
| Price | Upon Request |
| Power Supply | 220 V AC ±10% |
| Max Operating Pressure | 2.5 MPa |
| Burst Pressure | 2.7–3.3 MPa |
| Temperature Control Range | Ambient to 200 °C |
| Chamber Dimensions | 560 × 420 × 670 mm |
| Bomb Volume | 4000 mL |
| Heating Power | 2.4 kW |
| Temperature Alarm Range | 0–200 °C (adjustable) |
| Temperature Uniformity | ±0.5 °C |
| Display | Digital LED |
| Control System | Microprocessor-based Intelligent PID Controller |
| Bomb Construction | Inner chamber – AISI 304 stainless steel |
Overview
The JB-Brookfield JB-4000 Oxygen Bomb Aging Test Chamber is a precision-engineered accelerated aging apparatus designed for evaluating the oxidative thermal stability of polymeric insulating materials under elevated temperature and pressurized oxygen or compressed air environments. Based on the fundamental principle of accelerated oxidation kinetics—where reaction rates increase exponentially with temperature and partial pressure of oxygen—the JB-4000 enables standardized simulation of long-term service degradation in controlled laboratory conditions. It complies strictly with internationally recognized test protocols including GB/T 2951.12–2008 (Electric cables — Test methods for non-metallic materials of electric cables — Part 12: Methods for determining the mechanical properties of insulating and sheathing compounds), GB/T 5013–2008 (Rubber insulated cables — Rated voltages up to and including 450/750 V), and German VDE 0281–1. The system employs a sealed stainless-steel pressure bomb immersed in a thermally stabilized air bath, ensuring uniform heat transfer and minimal thermal lag across the sample volume.
Key Features
- High-integrity pressure vessel constructed from AISI 304 stainless steel for corrosion resistance and long-term structural integrity under cyclic thermal and oxidative stress
- Precision microprocessor-based PID temperature controller with digital LED display, offering setpoint resolution of 0.1 °C and real-time deviation compensation
- Thermally optimized air-circulating chamber with low-noise centrifugal fan and calibrated platinum RTD sensor (Class A accuracy)
- Integrated over-temperature and over-pressure safety interlocks, including dual-stage pressure relief valves and automatic power cutoff at preset alarm thresholds
- Compact footprint (560 × 420 × 670 mm) with ergonomic front-loading design and reinforced viewing window for visual monitoring without compromising seal integrity
- Low thermal mass heating system (2.4 kW) enabling rapid ramp-up to 200 °C with stable dwell performance and minimal overshoot
Sample Compatibility & Compliance
The JB-4000 accommodates standard cylindrical specimens of wire insulation, cable jacketing, elastomeric sheaths, and other cross-linked or thermoplastic polymer formulations—including PVC, PE, XLPE, EPR, silicone rubber, and TPU. Specimen geometry follows ASTM D573 and ISO 188 guidelines for dimensional consistency and surface-area-to-volume ratio control. All operational parameters are traceable to national metrological standards, and the instrument supports full audit trails required for GLP-compliant laboratories. While not inherently 21 CFR Part 11 compliant, its digital logging interface allows integration with validated LIMS or ELN platforms supporting electronic signature and data integrity requirements per FDA and EU Annex 11.
Software & Data Management
The JB-4000 operates as a standalone hardware platform with embedded firmware controlling all thermal and pressure cycles. Real-time temperature and alarm status are displayed locally; no proprietary software is bundled. However, the unit features an RS-485 serial interface (Modbus RTU protocol) for third-party SCADA or lab automation systems. Users may configure multi-step aging profiles (e.g., ramp-hold-cool sequences) via front-panel keypad navigation. Data export is achieved through optional analog voltage outputs (0–5 V DC proportional to temperature) or external dataloggers connected to the alarm relay contacts. Calibration certificates for temperature and pressure sensors are provided upon installation and recommended annually per ISO/IEC 17025 practices.
Applications
- Evaluation of insulation lifetime prediction models for low- and medium-voltage power cables
- Comparative aging studies of halogen-free flame-retardant (HFFR) compounds versus traditional PVC formulations
- Validation of crosslinking efficiency in irradiated or chemically cured polymer systems
- Prequalification testing of new elastomer blends intended for automotive wiring harnesses
- Supporting IEC 60811 series qualification for cable material submissions to certification bodies (e.g., UL, TÜV, SGS)
- Research into antioxidant depletion kinetics using gravimetric and FTIR post-test analysis
FAQ
What pressure media are supported by the JB-4000?
The chamber accepts both pure oxygen and compressed air as oxidizing atmospheres, with pressure regulation via external high-precision regulators meeting ISO 8573-1 Class 2 purity standards.
Is the bomb volume adjustable?
No—the 4000 mL internal volume is fixed and calibrated per GB/T 2951.12 Annex B requirements for standardized specimen loading density.
Can the unit be used for ASTM D3045 testing?
Yes, with minor procedural adaptation: ASTM D3045 specifies hot-air ovens, but the JB-4000’s pressurized oxygen environment provides accelerated equivalent aging; correlation studies must be performed per ASTM D573 Annex A.
What maintenance intervals are recommended?
O-ring inspection and replacement every 12 months or 200 cycles, pressure gauge calibration annually, and full system leak testing before each validation run.
Does the JB-4000 include a cooling mechanism?
No—it relies on passive air-cooling after power-off; active quenching requires external chilled gas purging systems compatible with stainless-steel bomb interfaces.
