Overview
EN ISO 8536-12:2021 - "Infusion equipment for medical use - Part 12: Check valves for single use" specifies safety and performance requirements for single‑use check valves used with infusion equipment (gravity‑feed and pressure infusion apparatus). The standard also covers the functional requirements for inline check valves and aligns connector requirements with the ISO 80369 small‑bore connector series.
Key topics and technical requirements
- Scope & designation
- Applies to single‑use check valves and inline check valves for infusion systems.
- Labelling must follow Clause 9 requirements.
- Materials & biocompatibility
- Materials must meet physical, chemical and biological requirements (see ISO 10993‑1 for biological evaluation).
- If rubber is used, ISO 8871‑1/2 requirements on extractables and characterization apply.
- Physical performance
- Particulate contamination: Manufactured and finished to minimize particles; tested per ISO 8536‑4 limits.
- Leakage: No air leakage when tested (see Clause A.2).
- Connector compatibility: Inlets/outlets without tube bond ports must use ISO 80369‑compatible connectors.
- Counterflow pressure resistance: Must withstand 200 kPa in the counterflow direction (Clause A.3).
- Flow rate: Minimum flow rate of 6 L/h when connected to infusion equipment (Clause A.4).
- Blocking performance: Valve must close at a counterflow pressure of not more than 2 kPa (Clause A.5).
- Opening pressure: Valve must open at not more than 2 kPa (Clauses A.6.1/A.6.2); higher opening pressure defines anti‑siphon valves.
- Sterility, labelling, packaging, disposal
- Sterility and pyrogenicity requirements included.
- Detailed labelling (unit and multi‑unit), packaging and disposal guidance are specified (Clauses 9–11).
Applications and users
- Primary users:
- Medical device manufacturers of infusion sets and components.
- Design engineers developing single‑use check valves and inline safety features.
- Quality & regulatory teams ensuring conformity with European and international standards.
- Test laboratories performing physical, chemical and biological verification.
- Procurement and clinical engineering selecting compliant infusion components.
- Practical applications:
- Preventing backflow and cross‑contamination in infusion therapy.
- Providing anti‑siphon protection in gravity feed and pressure infusion systems.
- Ensuring connector compatibility and patient safety in infusion lines.
Related standards
Keywords: EN ISO 8536-12:2021, check valves, infusion equipment, single use, inline check valves, ISO 80369, opening pressure, counterflow resistance, medical device standard.
