Cleanable design.
No crevices.
Sanitary first.
Medical equipment must clean reliably between uses. Crevices, dead spaces, sharp internal corners harbor bacteria. Design for cleanliness from start.
Key principles.
Drain everything
Avoid crevices, dead corners, hidden cavities. Design fully drainable.
Cleanable Ra
Ra 0.4-0.8 µm typical for cleanability. Electropolished for highest tier.
No sharp corners
Internal corners radiused 3-5 mm minimum. Bacteria collect in sharp corners.
No gaps
Sanitary welds — orbital TIG, smooth profile. No discontinuity for bacteria.
No recessed slots
Minimize fastener heads with recesses. Use button-head, smooth caps. Or bonded assemblies.
Cleaning agents
Materials resistant to medical cleaning agents (alcohol, chlorhexidine, hydrogen peroxide).
FAQ
What's "medical clean"?
Defined per: ISO 17664 (sterilization processing), ISO 13485 (QMS), AAMI standards. Application-specific.
Reusable vs disposable?
Reusable: must withstand 100s of cleanings without degrading. Disposable: lower cleaning burden.
Sterilization compatibility?
Steam autoclave 121°C: most metals OK, most plastics struggle. Gamma radiation: most materials but check polymer effects.
Surface roughness?
Ra ≤ 0.8 µm general medical, ≤ 0.4 µm sterile applications. Electropolished for biopharm.
Gasket selection?
Silicone or Viton standard. Avoid gasket types that absorb fluids.
Disassembly for cleaning?
Yes — design for disassembly between uses. Snap fits or thumbscrews enable user disassembly.
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