PSU Hemodialysis Component | Precision Machined Crescent Corner with Thin-Wall

We successfully delivered a precision machined PSU (polysulfone) component for a medical device manufacturer specializing in hemodialysis equipment. Machined from medical-grade transparent PSU, this compact part measures approximately 22mm × 8mm × 4mm thick and features a distinctive crescent-shaped corner with a precision thin-wall section. The component functions as a fluid channel cover and alignment feature within the dialysis machine's disposable cartridge interface, requiring exceptional dimensional accuracy and biocompatibility.

Project Overview

Key Technical Highlights

• Crescent-Shaped Corner with Thin-Wall Section: Precision-machined crescent geometry with a controlled thin-wall section (0.3-0.5mm) provides a flexible sealing or alignment feature for disposable cartridge interface.
• Medical-Grade PSU Material: Transparent PSU offers excellent biocompatibility (ISO 10993, USP Class VI), hydrolytic stability, and resistance to repeated sterilization cycles.
• Micro-Feature Precision: Achieved ±0.02mm tolerance on the delicate crescent feature, ensuring consistent engagement with mating components in the dialysis system.
• Transparent for Fluid Visualization: Material transparency allows visual confirmation of fluid presence or air bubbles during dialysis machine operation.
• Hydrolytic Stability: PSU maintains mechanical properties in continuous contact with dialysate fluids, heated water, and sterilization steam.
• Stress-Free Thin-Wall Machining: Specialized toolpath strategies prevent material stress or deformation in the delicate crescent thin-wall section.

PSU Material Properties for Medical Applications

Quality Verification

100% inspection performed using high-resolution vision measurement system and ZEISS CMM with 1.2μm repeatability. Crescent corner geometry verified against CAD model. Thin-wall thickness measured with non-contact laser micrometer. Surface finish verified on fluid contact areas. Material certification including biocompatibility documentation provided with each batch. Sterilization validation samples available upon request.

Medical Device Applications

✓ Hemodialysis machine components
✓ Disposable cartridge interfaces
✓ Fluid channel covers and seals
✓ Blood contact surfaces
✓ Sterilization trays and cassettes
✓ Surgical instrument handles
✓ Diagnostic equipment housings
✓ Laboratory fluidic devices
✓ Pharmaceutical processing equipment
✓ Wound therapy system components

Why Partner With Us?

• Expertise in medical-grade PSU Precision machining
• Specialized in thin-wall and micro-feature components
• Understanding of biocompatibility and sterilization requirements
• Cleanroom-compatible manufacturing available
• Material certification and full traceability
• Experience with ISO 13485 medical device quality systems
• Fast prototyping to production scaling with validation support