Shean LDZM-60L / LDZM-60L-I Vertical Stainless Steel Autoclave, 60 L

Overview

The Shean LDZM-60L and LDZM-60L-I are vertically oriented, Class B-compliant steam sterilizers engineered for reliable, repeatable moist-heat sterilization in academic laboratories, clinical diagnostic facilities, pharmaceutical QC labs, and biomedical research environments. These autoclaves operate on the fundamental principle of saturated steam under controlled pressure and temperature to achieve microbial inactivation—including spores—via protein denaturation and nucleic acid disruption. With a nominal chamber volume of 60 L and a maximum operating temperature of 134 °C at 0.217 MPa (equivalent to ~2.2 bar gauge), the units meet internationally recognized thermal lethality requirements for sterilizing wrapped and unwrapped instruments, culture media, glassware, textiles, and porous loads. The LDZM-60L features microprocessor-based semi-automatic control with LCD-guided operation; the LDZM-60L-I extends this with fully automated cycle execution, integrated cold-air purge, real-time parameter logging, and programmable start delay—enabling unattended operation aligned with GLP and GMP workflow expectations.

Key Features

• Robust chamber construction from AISI 304 stainless steel (≥2 mm wall thickness), corrosion-resistant and compliant with GB/T 150 and TSG 21 pressure vessel standards.
• Dual-safety interlock system combining electromechanical lid-locking logic and mechanical overpressure release valves—ensuring automatic lid retention during pressurized cycles and fail-safe pressure relief at 0.24 MPa design limit.
• Self-sealing gasket design with automatic expansion under steam pressure, minimizing maintenance and ensuring long-term sealing integrity.
• LCD graphical interface with scroll-based menu navigation, supporting one-touch parameter entry for temperature (50–134 °C) and time (0–99 h), dynamic process indication, and audible/visual end-of-cycle alerts.
• Integrated air removal via gravity displacement or vacuum-assisted pre-vacuum (LDZM-60L-I), validated for efficient steam penetration into porous and hollow loads per ISO 17665-1.
• Forced-air cooling system with built-in fan reduces post-sterilization cooldown time, enabling faster access to sterilized materials without compromising thermal stability of heat-sensitive items.
• Comprehensive safety architecture: dry-run protection, earth leakage detection, overtemperature/overpressure alarms with automatic exhaust activation, and real-time deviation correction for temperature uniformity.
• Optional RS232 or USB data export interface supports traceability; printer module available for hard-copy records including date/time, chamber temperature, pressure, and cycle duration—facilitating 21 CFR Part 11-aligned documentation where configured.

Sample Compatibility & Compliance

The LDZM-60L series accommodates a broad range of load types: solid instruments, wrapped surgical kits, liquid media (with slow-cool function), pipette tips, Petri dishes, and textile packs. Chamber geometry (Φ350 × 550 mm) permits vertical stacking of standard labware while maintaining adequate steam circulation. All models conform to Chinese national pressure equipment regulations (TSG 21-2016) and incorporate mandatory safety certifications for Class I pressure vessels. While not CE-marked for EU market placement, the design principles align with core elements of EN 285 (large steam sterilizers) and ISO 17665-1 (moist heat sterilization validation). For regulated environments, users may perform IQ/OQ/PQ qualification using the provided validation port and documented cycle parameters.

Software & Data Management

Both variants utilize embedded firmware with non-volatile memory for storing up to 99 user-defined programs. The LDZM-60L-I adds event logging (start/end timestamps, fault codes, temperature/pressure profiles) and optional serial output for external data capture. When equipped with the thermal printer accessory, each cycle generates a tamper-evident record suitable for internal audit trails. Though native software is not PC-hosted, exported logs can be imported into LIMS or Excel for trend analysis. The system supports manual calibration offset adjustment for temperature sensors, aiding routine verification against reference thermometers per ISO 13485 and CLSI EP25-A guidelines.

Applications

These autoclaves serve critical roles across multiple domains: sterilization of reusable surgical tools and dental handpieces in outpatient clinics; preparation of agar plates and broth media in microbiology teaching labs; decontamination of biohazardous waste in BSL-2 facilities; conditioning of filtration membranes and chromatography columns in analytical labs; and routine sanitization of glassware and plastic consumables in chemistry and molecular biology workflows. Their reliability, capacity, and compliance-ready architecture make them especially suited for institutions requiring consistent, auditable sterilization outcomes without full-scale industrial infrastructure.

FAQ

What is the difference between LDZM-60L and LDZM-60L-I?
The LDZM-60L is a microprocessor-controlled autoclave with manual initiation and basic automation; the LDZM-60L-I adds full cycle automation, programmable start delay, vacuum-assisted air removal, and enhanced data logging capabilities.
Does this autoclave support validation protocols?
Yes—it includes a dedicated validation port for thermocouple insertion and supports temperature mapping per ISO 17665-2. Users must perform initial IQ/OQ with qualified third-party vendors.
Is the chamber suitable for liquid sterilization?
Yes, with configurable slow-cool mode to prevent boil-over. Maximum recommended fill level is 75% of container volume.
Can it be integrated into a laboratory information management system (LIMS)?
Via optional RS232/USB output, raw cycle data can be exported for ingestion into LIMS or custom databases—though no native API or middleware is supplied.
What maintenance is required for long-term reliability?
Monthly gasket inspection, quarterly chamber drain cleaning, annual safety valve testing, and biannual verification of temperature/pressure sensor accuracy against NIST-traceable references.