ISO 8536-12:2021

Overview

ISO 8536-12:2021 - Infusion equipment for medical use - Part 12: Check valves for single use defines requirements for single‑use check valves used with infusion equipment (both gravity‑feed and pressure infusion apparatus). The document also covers inline check valves and specifies functional, physical, chemical and biological requirements, plus labelling, packaging and disposal guidance. Normative physical tests are given in Annex A.

Key topics and technical requirements

• Scope and applicability: Single‑use check valves for infusion sets (gravity and pressure) and inline check valves.
• Materials and biocompatibility: Materials must meet chemical/biological requirements; rubber components follow ISO 8871‑1/2. Biological evaluation in accordance with ISO 10993‑1.
• Physical performance:
  • Leakage: No air leakage when tested (Annex A). Typical test pressures include +50 kPa (15 s) and a vacuum of −20 kPa (15 s); for pressure sets an additional +200 kPa test is required.
  • Counterflow pressure resistance: Must withstand 200 kPa in the counterflow direction.
  • Flow rate: Minimum flow rate ≥ 6 L/h when connected to infusion equipment (Annex A.4).
  • Blocking performance: Valve shall close at counterflow pressure ≤ 2 kPa.
  • Opening pressure: Valve shall open at pressure ≤ 2 kPa (note: anti‑siphon/high‑pressure valves may require >2 kPa).
  • Particulate contamination: Manufactured to minimize particulates; meet contamination index limits when tested as per ISO 8536‑4.
  • Protective caps: Must protect fluid pathways, prevent contamination and injuries; secure but removable.
• Labelling:
  • Unit label must include manufacturer, contents description, sterility and pyrogenicity indicators, LOT, expiry (year/month), single‑use designation, instructions/warnings and a clear “P” (pressure) or “G” (gravity) marker.
  • Shelf/multi‑unit labels require similar core information (manufacturer, contents, LOT, expiry, P/G and storage notes).
• Packaging & disposal: Packaging per ISO 8536‑4; provide disposal information for secure, environmentally sound handling of contaminated single‑use valves.

Applications and who uses this standard

• Medical device manufacturers designing single‑use check valves or infusion sets.
• Quality assurance & regulatory teams ensuring compliance with performance, sterility and labelling requirements.
• Procurement specialists & clinicians selecting compatible, standards‑compliant infusion components.
• Test laboratories performing Annex A physical tests and verification for product certification.

Related standards (normative references)

• ISO 80369 series (small‑bore connectors)
• ISO 8536‑4 (infusion sets for single use, gravity feed)
• ISO 10993‑1 (biological evaluation)
• ISO 15223‑1 (symbol labelling)
• ISO 8871‑1 / ISO 8871‑2 (elastomeric parts)
• ISO 7886‑1 (syringes)

Keywords: ISO 8536-12:2021, check valves, single use, infusion equipment, inline check valve, gravity-feed, pressure infusion, flow rate, opening pressure, counterflow resistance, labelling, ISO 80369.