Boxun BXM-50M Vertical Steam Sterilizer
| Brand | Boxun |
|---|---|
| Origin | Shanghai, China |
| Model | BXM-50M |
| Instrument Type | Vertical |
| Max Temperature | 150 °C |
| Max Working Pressure | 0.22 MPa |
| Chamber Dimensions | Ø400 × 520 mm |
| External Dimensions | 750 × 800 × 950 mm |
| Chamber Volume | 50 L |
| Sterilization Temp Range | 105–135 °C |
| Drying Temp | 102 °C |
| Melting Temp Range | 40–100 °C |
| Holding Temp Range | 25–85 °C |
| Sterilization Time | 4–120 min |
| Drying Time | 0–999 min |
| Melting/Holding Time | 0–999 min |
| Delay Start | up to 99 h 60 min |
| Design Pressure | 0.25 MPa |
| Drying Residual Moisture | <1% |
| Heating Power | 5.1 kW |
| Supply Voltage | 220 V ± 22 V, 50 Hz ± 1 Hz |
| Ambient Operating Temp | 5–40 °C |
| Ambient Humidity | 20–80% RH |
| Chamber & Basket Material | SUS304 Stainless Steel |
Overview
The Boxun BXM-50M Vertical Steam Sterilizer is a CE-compliant, microprocessor-controlled laboratory-grade autoclave engineered for reliable thermal sterilization of medical instruments, glassware, culture media, and biohazardous waste in research laboratories, clinical diagnostics facilities, and pharmaceutical QC environments. It operates on the principle of saturated steam under elevated pressure—leveraging the established lethality kinetics of moist heat at temperatures exceeding 121 °C (corresponding to a minimum absolute pressure of ~0.11 MPa gauge) to achieve SAL (Sterility Assurance Level) of 10−6 per item, as defined by ISO 17665-1 and EN 285. The unit features a fully jacketed, double-walled stainless steel chamber with integrated vacuum-assisted air removal (pulse vacuum optional), ensuring uniform steam penetration and eliminating cold spots during cycle execution.
Key Features
- Robust SUS304 stainless steel chamber and dual-layer sterilization baskets—resistant to corrosion from repeated exposure to condensate, alkalis, and organic residues.
- Intelligent dual-channel automatic water replenishment system with independent inlet options for deionized water and municipal supply; includes low-water-level detection and fail-safe interlock.
- Integrated C.W.S. (Condensate Water Recycling System) that captures, cools, and recirculates sterilization condensate—reducing total water consumption by up to 40% per cycle.
- W.P.S. (Waste Purification System) comprising HEPA-filtered exhaust and activated carbon post-filtration, enabling safe discharge of non-condensable vapors and aerosolized organics in compliance with local environmental discharge regulations.
- 16 programmable cycle profiles with user-defined temperature/time parameters for sterilization, drying, melting, and holding—each stored with timestamped metadata and accessible via password-protected interface.
- Real-time monitoring via high-resolution capacitive touch LCD panel with graphical status display, cycle progress bar, fault diagnostics, and audible/visual alarm indicators.
- Mechanical self-locking door mechanism combined with electronic solenoid interlock and pressure-sensing safety circuitry—preventing door opening until chamber pressure drops to ambient and temperature falls below 80 °C.
- Active forced-air cooling system with variable-speed fan and thermal bypass ducting, reducing post-cycle cooldown time by approximately 35% compared to passive cooling methods.
- Standard single-point wired PT100 temperature probe for direct load monitoring; optional wireless validation sensors (calibrated at 0 °C, 60 °C, and 121 °C per ISO/IEC 17025-accredited certificate) support IQ/OQ/PQ documentation.
Sample Compatibility & Compliance
The BXM-50M accommodates standard laboratory loads including wrapped surgical kits, porous textile packs, liquid media in sealed bottles (with vented caps), and solid non-porous items. Its 50 L chamber volume supports up to two 360 × 200 mm trays stacked vertically. All cycles adhere to internationally recognized sterilization standards, including ISO 11134 (validation of moist heat sterilization), ISO 11140-1 (chemical indicator performance), and USP (sterilization principles). When configured with audit-trail-enabled software and electronic signature capability, the system meets FDA 21 CFR Part 11 requirements for electronic records and signatures in regulated GxP environments. Optional thermal mapping and biological indicator challenge studies may be conducted using validated wireless sensor arrays and Geobacillus stearothermophilus spore strips (ATCC 7953).
Software & Data Management
Data integrity is maintained through embedded non-volatile memory supporting ≥10,000 complete cycle logs—including start/stop timestamps, setpoints, actual temperature/pressure curves, alarm events, operator ID, and validation flag status. Logs are exportable via USB 2.0 port in CSV or PDF format compatible with LIMS integration. Optional thermal printer modules (thermal or impact ribbon) provide real-time hardcopy output with embedded cycle ID, operator name, and digital signature field. All data exports retain full traceability and are structured to satisfy GLP and GMP record retention mandates (minimum 5-year archival requirement). Remote operation is enabled via IR remote control or optional Ethernet/Wi-Fi module (not included), allowing supervised access from adjacent lab workstations without compromising physical security protocols.
Applications
- Sterilization of reusable surgical instruments and dental handpieces in university teaching hospitals.
- Preparation and terminal sterilization of microbiological growth media (e.g., nutrient agar, Sabouraud dextrose) in academic and industrial microbiology labs.
- Decontamination of BSL-2 waste streams prior to autoclave validation and off-site disposal.
- Moist-heat processing of polymer-based lab consumables requiring controlled ramp/soak/cool profiles.
- Validation of steam penetration efficacy in porous load configurations using calibrated wireless temperature sensors and biological indicators.
FAQ
What is the maximum allowable operating pressure and corresponding temperature?
The BXM-50M is rated for a maximum working pressure of 0.22 MPa (gauge), which corresponds to a saturated steam temperature of 134 °C under equilibrium conditions.
Does the unit support vacuum-assisted air removal for porous load sterilization?
Yes—the optional pulse vacuum function enables programmable evacuation cycles (2–99 pulses) to enhance steam penetration into wrapped or fibrous materials, meeting EN 285 Annex C requirements.
Can the sterilizer be integrated into a centralized laboratory monitoring system?
With the optional Ethernet/Wi-Fi communication module and Modbus TCP protocol support, the BXM-50M can transmit operational status, alarm states, and cycle summaries to SCADA or building management systems.
Is the internal chamber geometry suitable for validating temperature uniformity per ISO 17665?
Yes—the cylindrical chamber design (Ø400 × 520 mm) allows placement of ≥9 thermocouples in standardized grid positions across three axial planes, fulfilling spatial mapping requirements for routine qualification.
What maintenance intervals are recommended for the air filter and W.P.S. carbon cartridge?
The HEPA pre-filter should be inspected weekly and replaced every 6 months; the activated carbon core requires replacement after 500 sterilization cycles or annually—whichever occurs first—based on volatile organic compound breakthrough testing.
