Shen’an LDZM-40KCS Intelligent Vertical Steam Autoclave (40 L)

Overview

The Shen’an LDZM-40KCS Intelligent Vertical Steam Autoclave is a CE-compliant, microprocessor-controlled laboratory-grade sterilization system engineered for reliable, repeatable moist-heat sterilization of heat-stable instruments, glassware, culture media, and porous loads in pathology labs, clinical microbiology units, and academic research facilities. Operating on the fundamental principle of saturated steam under pressure—where elevated temperature (50–134 °C) and corresponding absolute pressure (up to ~210 kPa gauge) synergistically denature microbial proteins and nucleic acids—the LDZM-40KCS delivers validated lethality (F₀ ≥ 12 min typical for standard 121 °C/15 min cycles) across its 40 L stainless-steel chamber (Φ355 × 400 mm). Its vertical orientation optimizes floor space while enabling uniform steam penetration via gravity displacement and integrated internal exhaust management. Unlike legacy autoclaves, this model integrates real-time thermodynamic monitoring, programmable cycle logic, and fail-safe hardware interlocks to support GLP/GMP-aligned workflows.

Key Features

• Microcontroller-based intelligent control system with full-cycle automation—including pre-vacuum conditioning (optional), heating, sterilization hold, exhaust, and cooling phases
• Large-format LED display with Chinese-language interface showing real-time chamber temperature, pressure, elapsed time, remaining time, and active phase status
• One-touch digital keypad for rapid parameter entry: temperature (±0.5 °C resolution), duration (1-minute increments), and custom program recall
• Rotary quick-release lid mechanism with dual mechanical and electronic safety interlocks—door cannot open unless chamber pressure drops to ambient and temperature falls below 80 °C
• Integrated anti-scald plastic housing and thermal insulation layer reduce external surface temperature to <45 °C during operation
• Internal steam exhaust system eliminates uncontrolled venting; condensate is safely drained through a dedicated cooling trap
• Low-water cutoff sensor prevents heater dry-firing and triggers immediate shutdown with visual/audible alert
• Audible completion signal followed by automatic power-down ensures operator awareness without manual intervention

Sample Compatibility & Compliance

The LDZM-40KCS accommodates a broad range of sterilizable materials including wrapped surgical packs, unwrapped metal instruments, liquid media in sealed bottles (with pressure-relief caps), and porous textile loads. Chamber geometry and steam distribution design comply with ISO 17665-1:2017 requirements for uniform heat transfer and minimal cold-spot risk. While not certified to EN 285 or ANSI/AAMI ST79 out-of-the-box, the unit supports IQ/OQ documentation protocols and can be validated per institutional SOPs aligned with USP , FDA 21 CFR Part 820, and EU Annex 1 (for non-sterile compounding environments). All stainless-steel wetted surfaces are electropolished AISI 304 grade, minimizing corrosion and facilitating cleaning verification.

Software & Data Management

This standalone autoclave does not include embedded data logging or network connectivity as standard. However, an optional RS232/USB thermal printer module enables hard-copy output of cycle parameters, start/end timestamps, peak temperature/pressure, and alarm events—supporting audit trails required under GLP and basic GMP frameworks. For laboratories requiring electronic record retention, third-party data acquisition systems may interface via analog voltage outputs (0–5 V) mapped to temperature and pressure signals. All user-defined programs (up to 10 stored presets) retain settings after power loss thanks to non-volatile memory.

Applications

• Routine sterilization of histology tools, biopsy forceps, and embedding cassettes in pathology departments
• Preparation of agar plates, broth media, and buffer solutions in microbiology and cell culture labs
• Decontamination of biohazardous waste (e.g., used Petri dishes, pipette tips) prior to disposal
• Reprocessing of reusable labware such as flasks, beakers, and stainless-steel trays
• Validation support for sterilization process development in QA/QC environments

FAQ

Does the LDZM-40KCS meet international regulatory standards for medical device reprocessing?
It conforms to GB 8599–2008 (China’s national standard for large steam sterilizers) and incorporates engineering safeguards consistent with ISO 17665-1:2017. Formal compliance with EN 285 or AAMI ST79 requires site-specific validation and may necessitate optional accessories (e.g., calibrated temperature probes, data loggers).

Can liquid media be sterilized without boil-over or bottle rupture?
Yes—when using appropriate vented closures and selecting the “Liquid Cycle” mode (which extends exhaust duration and reduces pressure ramp rate), the unit maintains stable thermal equilibrium and minimizes turbulence-induced splashing.

Is drying functionality built-in?
No—drying is available only as an add-on module (LDZM-DRY-40), which introduces heated air circulation post-sterilization. Standard configuration provides passive cooling only.

What maintenance is required to ensure long-term reliability?
Daily: Empty and clean the water reservoir; inspect door gasket for debris or cracking. Weekly: Purge steam lines; verify pressure gauge calibration against a master reference. Annually: Replace safety valve and perform full chamber integrity test per manufacturer guidelines.