Chu Ding Technology LDZX-50FBS Automatic Top-Opening Vertical Steam Sterilizer

Overview

The Chu Ding Technology LDZX-50FBS is an automatic top-opening vertical steam sterilizer engineered for reliable, repeatable moist-heat sterilization in laboratory, academic, pharmaceutical, and food processing environments. It operates on the fundamental principle of saturated steam under controlled pressure—leveraging the thermodynamic relationship between steam pressure and temperature to achieve microbial lethality. At 121 °C (corresponding to ~0.1 MPa gauge pressure), the unit delivers validated thermal energy sufficient to inactivate bacterial spores—including *Geobacillus stearothermophilus*—in accordance with internationally recognized sterilization benchmarks such as ISO 17665-1 and EN 285. Its vertical orientation optimizes floor space utilization while enabling efficient chamber loading and unloading, particularly for tall or stacked items including glassware, culture media bottles, surgical instruments, and textile packs.

Key Features

• Automated sterilization cycle control with programmable start, hold, and exhaust phases
• Digital LCD interface providing real-time monitoring of chamber temperature, pressure, and elapsed time
• Precise temperature regulation from 50 °C (for low-temperature pasteurization or drying) up to 126 °C (for accelerated cycles)
• Adjustable sterilization duration from 0 to 99 hours, supporting both standard and extended protocols
• Integrated low-water protection system preventing heater dry-firing and ensuring operational safety
• Pressure-actuated safety valve calibrated to release at 0.145–0.165 MPa, compliant with ASME BPVC Section VIII requirements for Class I pressure vessels
• Acoustic end-of-cycle alert followed by automatic power cutoff and natural cooling phase initiation
• Entire chamber, door gasket, and structural frame fabricated from corrosion-resistant 304 stainless steel—meeting ASTM A240 standards for biomedical equipment surfaces

Sample Compatibility & Compliance

The LDZX-50FBS accommodates a broad range of load types: liquid media (e.g., agar, broth), porous materials (gauze, cotton rolls), solid metal instruments, heat-stable plastics (e.g., polypropylene containers), and glassware. Load configuration must comply with ISO 11140-1 guidelines to ensure uniform steam penetration and avoid cold spots. The unit supports gravity displacement air removal, making it suitable for non-porous and moderately porous loads. While not equipped for vacuum-assisted pre-sterilization air removal (required for wrapped or lumened devices per ISO 17665-2), it meets minimum performance criteria for laboratory-grade sterilization under GLP-aligned workflows. Documentation includes CE-marked electrical safety certification (IEC 61010-1) and conforms to national medical device registration requirements for Class II sterilizers in China (NMPA Registration No. applicable per model variant).

Software & Data Management

This model features embedded firmware with non-volatile memory for storing up to 10 user-defined programs. Cycle logs—including setpoints, actual temperature/pressure profiles, and completion timestamps—are retained onboard and can be reviewed via the LCD menu. Though it does not include USB export or network connectivity, all operational events (e.g., door opening, water level alerts, pressure excursions) are timestamped and traceable for internal quality records. For laboratories operating under FDA 21 CFR Part 11 or EU Annex 11, optional external data loggers (e.g., certified thermocouple-based systems) may be integrated to support audit-ready validation reports. Routine maintenance intervals—such as gasket inspection, safety valve testing, and chamber calibration—are aligned with ISO 13485 preventive maintenance schedules.

Applications

• Sterilization of microbiological culture media, buffers, and reagents in academic and industrial R&D labs
• Decontamination of reusable labware including pipette tips, Petri dishes, and volumetric flasks
• Preparation of sterile substrates for tissue culture and fermentation processes
• Thermal validation of packaging integrity for low-acid food products (e.g., canned vegetables, sauces)
• Disinfection of PPE and non-critical medical tools in veterinary clinics and field laboratories
• Supporting ISO/IEC 17025-compliant calibration labs requiring documented thermal process control

FAQ

What is the maximum recommended working pressure for continuous operation?
The sterilizer is rated for sustained operation at 0.21 MPa (absolute), with safety relief activated between 0.145–0.165 MPa (gauge).
Can this unit be validated for use in GMP environments?
Yes—when paired with third-party IQ/OQ/PQ protocols, temperature mapping, and periodic biological indicator challenges (e.g., *G. stearothermophilus* spore strips), it supports compliance with EU GMP Annex 1 and USP <1211>.
Is distilled water required for operation?
Deionized or softened water is strongly recommended to minimize scale buildup and extend heating element life; tap water with >100 ppm hardness is not advised.
Does the unit support automatic drying cycles?
No—the LDZX-50FBS performs gravity-assisted exhaust only; post-sterilization drying requires manual venting or external hot-air ovens.
How often should the door gasket be replaced?
Under typical use (2–5 cycles/day), inspect quarterly and replace every 12–18 months—or immediately if cracking, compression set, or steam leakage is observed.