Shen’an DSX-18L-I Portable High-Pressure Steam Sterilizer

Overview

The Shen’an DSX-18L-I is a compact, manually operated portable high-pressure steam sterilizer engineered for reliable terminal sterilization of heat-stable laboratory materials in resource-constrained or space-limited environments. Utilizing saturated steam under controlled pressure and temperature—principally operating at 121 °C (0.1 MPa) or 126 °C (0.142 MPa)—this Class N non-vacuum sterilizer achieves microbial inactivation through thermal denaturation of proteins and nucleic acids. Its design adheres to fundamental principles outlined 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) and aligns with national pressure vessel safety standards (TSG 21–2016) for structural integrity, pressure containment, and fail-safe operation. The unit is intended for use in academic teaching labs, field clinics, veterinary practices, and small-scale biotechnology facilities where consistent, repeatable sterilization cycles are required without reliance on centralized steam infrastructure.

Key Features

• Interlocked Quick-Opening Lid Mechanism: A cam-actuated, radial shift-type lid system ensures mechanical alignment before pressurization and prevents accidental opening during operation—meeting basic mechanical safety interlock requirements per GB/T 30690–2014.
• Dual-Scale Analog Pressure Gauge: Calibrated in both MPa and psi, enabling cross-verification of chamber pressure; integrated with overpressure relief via a certified spring-loaded safety valve (set point: 0.165 MPa).
• Self-Sealing Gasket System: High-temperature silicone elastomer gasket expands radially under steam pressure to ensure leak-tight sealing without manual torque adjustment.
• Auto-Lock Lid Assembly: Mechanical linkage engages only when internal pressure drops below 0.02 MPa, preventing premature lid release and ensuring operator safety.
• Digital Control Interface: LED-display microprocessor controller provides real-time monitoring of temperature, elapsed time, and cycle status; supports programmable setpoints across 50–126 °C and 0–99 hours.
• Dry-Run Protection: Integrated water-level sensor interrupts heating if chamber water volume falls below minimum operational threshold, preventing heater element damage.
• Compliance-Ready Construction: Fully austenitic stainless steel (SS304) chamber and jacket; wall thickness ≥2.0 mm; hydrostatically tested at 1.5× rated working pressure prior to commissioning.

Sample Compatibility & Compliance

The DSX-18L-I accommodates standard laboratory loads including wrapped instrument packs, glassware (e.g., flasks, pipettes), culture media in sealed containers, and porous textile items—provided load geometry permits uniform steam penetration and air removal via gravity displacement. It is not suitable for liquids in sealed vessels, heat-labile polymers, or vacuum-sensitive devices. While not validated for ISO 13485 or FDA 21 CFR Part 820 compliance out-of-the-box, its pressure vessel certification (TSG 21), documented material traceability, and configurable cycle parameters support integration into GLP-aligned workflows. Users must perform installation qualification (IQ), operational qualification (OQ), and periodic performance verification (e.g., biological indicators per ISO 11138-1) to meet institutional sterilization validation requirements.

Software & Data Management

This model operates via embedded firmware without external software dependency. All cycle parameters—including temperature setpoint, dwell time, and start delay—are stored in non-volatile memory and retain settings after power interruption. The controller logs last-run parameters but does not generate audit-trail data or electronic signatures. For laboratories requiring 21 CFR Part 11 compliance, third-party standalone data loggers with calibrated thermocouples (e.g., compliant with ASTM E2810–21) may be deployed alongside the unit to record temperature/pressure profiles. Raw cycle data can be exported manually via visual readout or photographed for record retention.

Applications

• Sterilization of reusable surgical instruments and dental tools in ambulatory care settings
• Preparation of agar plates, broth media, and buffer solutions in undergraduate microbiology labs
• Decontamination of biohazard waste (e.g., Petri dishes, tips) prior to disposal
• Heat treatment of soil samples in agricultural research
• Validation reference units in multi-chamber sterilization facility commissioning

FAQ

Is the DSX-18L-I certified for use in regulated pharmaceutical manufacturing?
No—it is not designed or validated to meet cGMP Annex 1 or EU GMP requirements. It is classified as a general-purpose sterilizer for non-critical applications.

Can I sterilize liquid media in bottles using this unit?
Yes, but only in vented containers with loosened caps; full sterilization of sealed liquid loads requires vacuum-assisted air removal, which this gravity-displacement model cannot provide.

What maintenance intervals are recommended?
Inspect and replace the silicone door gasket every 6 months or after 500 cycles; calibrate the pressure gauge annually against a certified reference standard; verify safety valve function quarterly.

Does it support automatic drying cycles?
No—this model lacks post-sterilization vacuum or heated drying functionality. Drying must be performed externally or via natural cooling and residual steam venting.

Is technical documentation available in English?
Yes—operation manuals, parts schematics, and pressure vessel certification documents are provided in bilingual (Chinese/English) format upon request.