Jihepu YX-18LM Portable Steam Sterilizer

Overview

The Jihepu YX-18LM Portable Steam Sterilizer is a gravity-displacement, manually operated autoclave engineered for reliable saturated steam sterilization under controlled pressure and temperature conditions. It operates on the fundamental principle that saturated steam at elevated pressure achieves temperatures above 100 °C—specifically up to 126 °C at 0.16 MPa—enabling effective microbial inactivation of vegetative bacteria, fungi, viruses, and bacterial spores. Designed for compact laboratory, clinical, and field-deployable use, this unit complies with core sterilization process requirements defined in 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). Its portable form factor and self-contained operation make it suitable for environments where centralized sterilization infrastructure is unavailable—including rural clinics, mobile laboratories, educational institutions, and small-scale bioprocessing facilities.

Key Features

• Full stainless steel construction (equivalent to AISI 304) ensures long-term resistance to corrosion from repeated exposure to condensate, cleaning agents, and biological residues—critical for GLP-compliant maintenance and regulatory audit readiness.
• Integrated dual-scale analog gauge displays both pressure (MPa) and corresponding saturation temperature (°C), enabling real-time verification of sterilization cycle thermodynamic equivalence without external calibration tools.
• Spring-loaded safety valve is factory-set to activate at 0.165 MPa, providing passive overpressure relief independent of electrical or user intervention—meeting mechanical safety requirements per EN 285:2015 Annex C for steam sterilizers.
• Immersed stainless steel heating element incorporates dry-run overheat protection, automatically de-energizing the system if water level falls below operational threshold—preventing thermal damage and ensuring repeatable heating profiles across cycles.
• Gravity displacement chamber design facilitates efficient air removal prior to pressurization, supporting consistent steam penetration into porous loads such as wrapped instruments, gauze, and cotton plugs.

Sample Compatibility & Compliance

The YX-18LM accommodates standard sterilization loads including metal surgical instruments, glassware (e.g., pipettes, flasks, Petri dishes), textile dressings, liquid media (up to 500 mL per container, with appropriate venting), and rubber stoppers. Load configuration must follow validated placement protocols to avoid cold spot formation. While not designed for porous load vacuum cycles or wrapped device sterility assurance levels (SAL) ≤10⁻⁶ per ISO 11134, it supports routine sterilization of non-critical and semi-critical items per WHO HTM 01-01 and CDC Guideline for Disinfection and Sterilization. Documentation of cycle parameters (time, temperature, pressure) is manually recorded; for regulated environments requiring electronic audit trails, integration with external data loggers compliant with FDA 21 CFR Part 11 is recommended.

Software & Data Management

This model operates via manual control interface only—no embedded microprocessor, touchscreen, or digital programming logic. Cycle execution relies on operator timing, visual gauge interpretation, and mechanical valve actuation. Consequently, it does not include onboard software, firmware updates, or network connectivity. All operational records—including batch number, load composition, start/end time, peak pressure/temperature, and operator initials—must be maintained in paper-based logbooks traceable to ISO 9001:2015 clause 8.5.2 (Identification and traceability) and ISO 13485:2016 clause 7.5.9 (Production and service provision — Control of monitoring and measuring equipment). For laboratories transitioning toward digital quality systems, external USB or Bluetooth-enabled pressure/temperature data loggers (e.g., compliant with NIST-traceable calibration standards) may be deployed alongside the unit.

Applications

• Routine sterilization of reusable labware in teaching laboratories and research cores where Class B or Class S autoclave functionality is not mandated.
• Field-deployable sterilization for public health outreach programs, especially in high-altitude regions where boiling-point depression necessitates pressurized steam generation for potable water treatment and basic instrument reprocessing.
• Pre-sterilization conditioning of culture media and buffer solutions in microbiology and molecular biology workflows—provided containers are vented during heating and cooled gradually post-cycle to prevent boil-over or container rupture.
• Supporting GMP-aligned ancillary processes in pilot-scale pharmaceutical manufacturing, such as sterilizing glass vials prior to aseptic filling trials (subject to supplementary validation).

FAQ

What is the maximum validated sterilization temperature and corresponding pressure?

The unit achieves a maximum operating temperature of 126 °C, which corresponds to a saturated steam pressure range of 0.14–0.16 MPa at sea level. Actual temperature-pressure correlation varies slightly with ambient barometric pressure.

Is this sterilizer suitable for sterilizing liquids?

Yes—when using appropriate vented containers (e.g., bottles with loosened caps or silicone-sealed closures), liquids such as nutrient broths and saline solutions can be sterilized. Recommended hold time at 121 °C is 15–20 minutes; extended exposure at 126 °C reduces required duration but increases evaporation risk.

Does the unit meet international regulatory standards for medical device reprocessing?

It satisfies basic mechanical and material safety requirements referenced in EN 285 and ISO 17665-1. However, formal validation for medical device reprocessing (e.g., per AAMI ST79 or EU MDR Annex I) requires site-specific IQ/OQ/PQ protocols conducted by qualified personnel.

Can the sterilizer be used at high altitudes?

Yes—the pressure-based temperature control compensates for reduced atmospheric pressure. Users must adjust cycle timing based on local boiling point elevation data and verify temperature uniformity using calibrated biological indicators (e.g., Bacillus stearothermophilus spore strips).

What maintenance is required to ensure long-term reliability?

Daily: Drain condensate after each cycle; inspect safety valve function weekly by lifting lever manually; clean chamber interior with neutral pH detergent monthly; verify pressure gauge accuracy annually against a certified reference standard.