LDZX-50FA Vertical Steam Sterilizer with Automatic Control and Flip-Top Lid

Overview

The LDZX-50FA Vertical Steam Sterilizer is an electrically heated, fully automatic, flip-top lid sterilization system engineered for reliable saturated steam sterilization under controlled pressure and temperature conditions. It operates on the principle of moist heat sterilization—utilizing pressurized saturated steam at temperatures between 115 °C and 127 °C to achieve microbial inactivation through protein denaturation and nucleic acid disruption. Designed in accordance with GB/T 30690–2014 (General Requirements for Small Steam Sterilizers) and aligned with ISO 17665-1:2017 (Sterilization of health care products — Moist heat — Part 1: Requirements for the development, validation and routine control of a sterilization process for medical devices), the LDZX-50FA delivers consistent performance suitable for laboratory, educational, pharmaceutical, and food processing environments where validated thermal decontamination of reusable instruments, glassware, culture media, textiles, and liquid preparations is required.

Key Features

• Stainless steel sterilization chamber fabricated from high-grade SUS304 austenitic stainless steel—resistant to corrosion, thermal fatigue, and repeated autoclaving cycles
• Flip-top hinged lid design enabling rapid access and ergonomic loading/unloading without floor space compromise
• Microprocessor-based controller with independent digital setting for sterilization temperature (115–127 °C) and duration (0–60 minutes), supporting repeatable cycle programming
• Integrated safety interlock system that prevents lid opening during pressurized operation and halts heating if water level falls below minimum threshold
• Self-expanding silicone gasket seal ensuring leak-tight integrity across operational pressure range (up to 0.165 MPa gauge)
• Dual-scale Class II Bourdon tube pressure gauge providing simultaneous readout in MPa and psi for operational verification and regulatory documentation
• Automatic overpressure relief valve calibrated to activate within 0.145–0.165 MPa, compliant with ASME BPVC Section VIII Div. 1 safety margins
• LED status indicators for power-on, heating, sterilization, exhaust, and completion phases—supporting visual cycle monitoring without opening the chamber

Sample Compatibility & Compliance

The LDZX-50FA accommodates a broad range of load types including wrapped surgical instruments, cotton gauze, Petri dishes, Erlenmeyer flasks containing nutrient broth or agar media, borosilicate glassware, and sealed polypropylene containers rated for autoclaving. Its 50-liter chamber volume supports batch processing of up to 25 standard 500-mL media bottles or equivalent instrument sets per cycle. The unit meets national standards for small steam sterilizers (GB/T 30690–2014) and aligns with internationally recognized benchmarks for sterilization process validation, including ISO 11134 (Validation and routine control of industrial moist heat sterilization processes) and EN 285 (Steam sterilizers — Large sterilizers). While not FDA 510(k)-cleared as a medical device, its performance parameters satisfy GLP-compliant laboratory requirements for non-clinical sterilization applications.

Software & Data Management

The LDZX-50FA operates via embedded firmware with no external PC interface or data logging capability. All cycle parameters are set and monitored locally using front-panel push-button controls and LED feedback. For laboratories requiring audit trails or electronic records, third-party USB-connected temperature/pressure dataloggers (e.g., Omega OM-CP-HITEMP140) may be installed externally at the chamber’s auxiliary port (if equipped) to capture real-time thermodynamic profiles. The absence of network connectivity ensures electromagnetic compatibility in shared lab environments and eliminates cybersecurity concerns associated with IoT-enabled sterilizers. Cycle logs must be manually recorded in hardcopy or LIMS-integrated spreadsheets per internal SOPs referencing ISO/IEC 17025:2017 clause 7.10 on result reporting.

Applications

• Preparation of sterile microbiological growth media in academic and industrial research labs
• Decontamination of reusable glass and metal labware prior to aseptic handling
• Terminal sterilization of pre-packed surgical kits in veterinary clinics and field hospitals
• Heat-labile liquid sterilization in food safety testing facilities (e.g., buffer solutions, diluents)
• Validation of sterilization protocols for ISO 13485-certified medical device manufacturers’ ancillary equipment
• Training platforms for biosafety and sterilization technology curricula in university biomedical engineering programs

FAQ

What is the maximum operating pressure of the LDZX-50FA?

The chamber is rated for a maximum working pressure of 0.165 MPa (gauge), with mechanical overpressure relief activating between 0.145–0.165 MPa.
Can this sterilizer be used for liquid loads?

Yes—provided containers are vented or loosely capped to prevent boil-over; recommended cycle settings: 121 °C for 20–30 minutes with slow exhaust to minimize turbulence.
Is the chamber fully jacketed?

No—the LDZX-50FA employs direct electric heating elements surrounding the chamber wall, not a steam-jacketed design; this configuration reduces warm-up time but requires strict adherence to water level checks.
Does it support gravity or vacuum-assisted air removal?

It uses gravity displacement only; no vacuum pump or pulsing function is integrated, limiting its suitability for porous loads without supplementary pre-vacuum treatment.
What maintenance intervals are recommended?

Daily visual inspection of gasket integrity and water level; monthly cleaning of chamber drain filter; annual calibration of pressure gauge and temperature sensor by accredited metrology service per ISO/IEC 17025.