Leybold LDZX-75KBS / LDZX-50KBS / LDZX-30KBS Vertical Steam Sterilizer (Autoclave) – Fully Stainless Steel, Handwheel-Operated, Programmable

Overview

The Leybold LDZX series vertical steam sterilizers (autoclaves) are fully stainless steel, handwheel-operated, programmable laboratory-grade pressure steam sterilization systems engineered for reliable, repeatable, and compliant thermal decontamination. These units operate on the principle of saturated steam under positive pressure—leveraging the well-established microbiological efficacy of moist heat at elevated temperatures (up to 126 °C) and pressures (up to 0.165 MPa) to achieve sterility assurance levels (SAL) of 10⁻⁶, consistent with ISO 17665-1 and EN 285 requirements for steam sterilization of medical devices and laboratory materials. Designed for continuous use in regulated environments, the LDZX series is widely deployed across clinical laboratories, university research facilities, pharmaceutical QC labs, food safety testing centers, and biotechnology R&D units where validation-ready, GxP-aligned sterilization processes are essential.

Key Features

• Fully AISI 304 stainless steel construction—including chamber, door, jacket, and exterior casing—for corrosion resistance, cleanability, and long-term structural integrity in high-humidity, high-temperature cycles.
• Handwheel-actuated quick-opening door mechanism with integrated pressure interlock: mechanical safety prevents door opening until internal pressure drops below 0.02 MPa, ensuring operator protection per ISO 13485 and EU MDR Annex I essential requirements.
• Microprocessor-based control system with digital LCD display showing real-time temperature, pressure, elapsed time, and phase status (heating, sterilizing, drying, cooling).
• Programmable cycle parameters: adjustable sterilization temperature (50–126 °C) and dwell time (0–99 hours), supporting both standard gravity displacement and optional pre-vacuum or liquid-cycle protocols.
• Dual safety redundancy: automatic overpressure relief valve (setpoint 0.145–0.165 MPa) and independent overtemperature cutoff (134 °C limit), certified to PED 2014/68/EU and ASME BPVC Section VIII Div. 1 design criteria.
• Integrated low-water protection circuit halts operation and triggers audible alarm if water level falls below minimum threshold, preventing dry-heating damage to heating elements.
• End-of-cycle acoustic signal and automatic power-down ensure hands-free workflow integration and energy efficiency.

Sample Compatibility & Compliance

The LDZX autoclaves accommodate a broad spectrum of load types—including wrapped/unwrapped surgical instruments, cotton gauze and linen packs, glassware (e.g., flasks, pipettes), culture media (agar, broth), saline solutions, and polymer-based lab consumables—provided they are validated for steam sterilization. Chamber geometry supports uniform steam penetration and condensate drainage. Units comply with national standards GB 8599–2008 (China) for large steam sterilizers and meet foundational technical prerequisites for alignment with ISO 13485:2016, ISO 11134:2014 (validation of sterilization processes), and FDA 21 CFR Part 820.70 (production and process controls). While not supplied with factory-installed audit trail or electronic signature capability, the control architecture permits third-party integration with validated data logging systems for GLP/GMP traceability.

Software & Data Management

The LDZX series features embedded firmware with non-volatile memory retaining up to 100 cycle logs—including date/time stamp, setpoints, actual temperature/pressure profiles, and fault codes. Data export is supported via optional RS-232 or USB interface (hardware module sold separately), enabling transfer to external PCs for review, archiving, and report generation in CSV or PDF formats. For regulated environments requiring electronic records compliance, users may deploy compatible third-party validation software (e.g., ValSuite™ or QualiTrak™) to configure electronic signatures, user access tiers, and 21 CFR Part 11-compliant audit trails. Firmware updates are performed via secure offline protocol using manufacturer-provided utilities.

Applications

These sterilizers serve as primary decontamination tools in biosafety level 1–2 laboratories, hospital central sterile supply departments (CSSD), academic microbiology teaching labs, and contract manufacturing organizations (CMOs) performing sterile product preparation. Typical applications include: terminal sterilization of reusable surgical kits prior to packaging; depyrogenation of glass vials and stoppers; inactivation of BSL-2 pathogens (e.g., E. coli, S. aureus) in waste loads; sterilization of nutrient agar and tryptic soy broth before pour-plating; and routine sanitization of pipette tips, Petri dishes, and stainless steel forceps. The LDZX-30KBS is optimized for teaching labs and small-scale QC; the LDZX-50KBS suits mid-volume university core facilities; and the LDZX-75KBS meets throughput demands of hospital CSSDs and industrial pilot plants.

FAQ

What is the maximum operating temperature and pressure?

The sterilizer operates at temperatures up to 126 °C and pressures up to 0.165 MPa (absolute), corresponding to saturated steam conditions suitable for achieving a 10⁻⁶ SAL.

Is validation documentation provided with the unit?

Factory-supplied IQ/OQ documentation templates are included. Full PQ execution requires user-specific load mapping, biological indicator testing (e.g., Geobacillus stearothermophilus spores), and thermocouple mapping per ISO 17665-2.

Can the LDZX series be used for liquid sterilization cycles?

Yes—programmable slow-cool and post-sterilization drying phases prevent boil-over and container rupture. Users must select appropriate cycle profiles and ensure adequate headspace in containers.

Does the unit support remote monitoring or network connectivity?

Standard configuration includes local LCD interface only. Ethernet or Wi-Fi modules are available as optional add-ons for integration into facility-wide monitoring systems.

What maintenance intervals are recommended?

Daily: visual inspection of door gasket, water level, and drain filter. Quarterly: calibration verification of temperature and pressure sensors using NIST-traceable references. Annually: full safety valve certification and chamber integrity test (hydrostatic or vacuum hold).