LDZH-100KBS Vertical Steam Sterilizer with Manual-Lever Door, 100 L Capacity

Overview

The LDZH-100KBS is a vertical, manually operated steam sterilizer engineered for reliable, repeatable moist-heat sterilization in laboratory, educational, pharmaceutical, and biomedical settings. It operates on the fundamental principle of saturated steam under pressure—leveraging the well-established microbiocidal efficacy of steam at elevated temperatures (up to 134 °C) and corresponding absolute pressures (up to 0.208 MPa gauge). This thermodynamic process ensures rapid and complete inactivation of bacterial spores—including Bacillus stearothermophilus—as validated per ISO 17665-1 and aligned with EN 285 requirements for steam sterilization of reusable medical devices. The unit’s vertical orientation optimizes floor space usage while accommodating large-volume loads such as instrument trays, glassware racks, culture media bottles, and textile packs—making it especially suitable for centralized sterilization workflows in teaching labs, QC laboratories, and small-scale bioprocessing facilities.

Key Features

• Manual-lever quick-opening door: Robust, ergonomic lever mechanism enables secure, pressure-interlocked access without hydraulic or pneumatic assistance—ensuring mechanical simplicity, long-term reliability, and intuitive operation in high-traffic environments.
• Microprocessor-controlled sterilization cycles: Programmable logic controller manages temperature ramping, dwell time, exhaust rate, and drying phases with ±1 °C thermal stability and real-time digital feedback via backlit LCD interface.
• Full 304 stainless steel construction: Chamber, jacket, door gasket housing, and exterior panels are fabricated from corrosion-resistant, non-porous 304 stainless steel—meeting material compatibility requirements for repeated exposure to condensate, cleaning agents, and humid environments.
• Comprehensive safety architecture: Dual redundant pressure monitoring, mechanical pressure relief valve set at 0.145–0.208 MPa, automatic chamber depressurization prior to door release, and fail-safe interlock preventing door opening during pressurized operation.
• Flexible process parameter configuration: User-defined sterilization profiles support temperature ranges from 50 °C (for heat-labile item conditioning) to 134 °C (for rapid sterilization), with time settings adjustable in 1-minute increments up to 99 hours.
• Audible and visual cycle completion signaling: Integrated buzzer alerts operators at end-of-cycle; system automatically powers down after final exhaust and cooling phase—reducing energy consumption and operator oversight requirements.

Sample Compatibility & Compliance

The LDZH-100KBS accommodates a broad spectrum of load types, including wrapped and unwrapped surgical instruments, cotton gauze and linen packs, borosilicate glassware (e.g., Erlenmeyer flasks, pipettes), liquid media in sealed or vented containers, and polymer-based lab consumables compatible with steam exposure. Its chamber geometry (Φ500 × 550 mm) permits vertical stacking of standard autoclave baskets and allows unobstructed steam penetration across heterogeneous loads. While not certified to ISO 13485 or FDA 21 CFR Part 820 out-of-the-box, the unit’s design principles and performance envelope conform to foundational sterilization standards referenced in ISO 17665-1, EN 285, and national GB 8599–2008 (China) for large steam sterilizers. For regulated applications requiring audit-ready documentation, optional external data loggers compliant with GLP/GMP traceability protocols may be integrated via RS-485 or analog output interfaces.

Software & Data Management

The LDZH-100KBS employs an embedded microcontroller with non-volatile memory storing up to 99 user-programmable cycles and retaining last-run parameters—even during power interruption. All operational events—including start time, setpoints, actual chamber temperature/pressure curves, and fault codes—are logged in real time and displayed on the LCD panel. Though the base model does not include Ethernet connectivity or PC-based software, its serial communication port supports third-party data acquisition systems configured for CSV export, PDF report generation, and integration into centralized laboratory information management systems (LIMS). When used in environments governed by FDA 21 CFR Part 11, supplementary electronic signature and audit trail capabilities can be implemented externally through validated middleware solutions.

Applications

• Sterilization of reusable surgical tools and dental instruments in university teaching hospitals and clinical training centers
• Preparation of sterile growth media, buffers, and reagents in microbiology and molecular biology laboratories
• Decontamination of biohazardous waste prior to disposal in BSL-2 containment facilities
• Validation of sterilization processes for packaging materials and device components in early-stage medical device development
• Heat treatment of soil samples and agricultural substrates in plant pathology and food safety research
• Routine sanitization of glassware, stainless steel trays, and filtration assemblies in analytical QC labs

FAQ

What is the maximum operating pressure and corresponding temperature?
The sterilizer is rated for a maximum working pressure of 0.208 MPa (gauge), which corresponds to a saturated steam temperature of 134 °C under equilibrium conditions.

Is the chamber volume equivalent to usable load capacity?
The nominal chamber volume is 100 L; however, effective load volume must account for steam circulation clearance—typically limited to 70–80% of total chamber volume to ensure uniform heat distribution and complete air removal.

Does this model support gravity displacement or pre-vacuum air removal?
The LDZH-100KBS utilizes gravity displacement air removal only; it does not incorporate vacuum pumps or pulsing cycles. Optimal results require proper load arrangement and adequate preheating time for porous items.

Can liquid media be sterilized without boil-over or container rupture?
Yes—provided bottles are loosely capped or fitted with vented closures, and heating/cooling rates are programmed to avoid thermal shock. The controller supports slow exhaust modes specifically for liquid loads.

What maintenance intervals are recommended for sustained compliance?
Daily: Visual inspection of door seal integrity and chamber cleanliness.
Weekly: Functional test of pressure relief valve and interlock mechanism.
Annually: Calibration verification of temperature and pressure sensors by accredited metrology service provider.