Dialysis Machine Clamp

The Dialysis Machine Clamp must retain medical-grade tubing under cyclic loading conditions generated by peristaltic pumps and negative pressure phases during ultrafiltration. Tubing materials such as DEHP-free PVC or platinum-cured silicone tend to exhibit elastic recovery, which can lead to positional drift if clamp force distribution is inconsistent. A Dialysis Machine Clamp designed with uniform pressure profiles and precision radii across its contact surfaces prevents lumen collapse while maintaining axial retention under pressure variations exceeding ±250 mmHg.  

Material Specification

Stainless Steel 316L (ASTM F138), Aluminum 6061-T6 (AMS 4025), Titanium 6Al-4V ELI (ASTM F136)

Dimensional Tolerance

±0.05mm (Critical Features), ±0.1mm (Overall Profile), Clamping Gap – ±0.02mm

Surface Finish

Ra ≤0.4µm (Contact Surfaces), Ra ≤0.8µm (Non-Critical), Electropolished (Optional, Ra ≤0.2µm)

Thread Specifications

M6–M12 (Metric), UNF Threads (5/16″-24 UNJF), Thread Pitch – ±0.01mm

Heat Treatment

Solution Annealed (SS, ASTM A967), T6 Temper (Al, AMS 2772), Stress-Relieved (Ti, ASTM F136)

Product Description

Each Dialysis Machine Clamp is subjected to thousands of open-close cycles due to routine setup and maintenance. High-cycle fatigue performance is essential to avoid stress-induced failures such as hinge cracking or arm deformation. A properly engineered Dialysis Machine Clamp utilizes materials like 30% glass-filled PEEK or polyetherimide, offering high tensile strength, chemical resistance, and minimal creep.  

Coating

Passivated (SS, ASTM A967), Anodized (Al, MIL-A-8625)

Certification Standard

ISO 13485, FDA 510(k), ISO 10993-1 (Biocompatibility), IEC 60601-1 (Electrical Safety)

Flatness/Parallelism

Flatness ≤0.05mm/m, Parallelism ≤0.02mm, Perpendicularity ≤0.03mm

Load-Bearing/Strength

Clamping Force – 50–200N, Fatigue Life – 10⁶ Cycles, Tensile Strength – ≥500MPa (SS)

Inspection Method

100% CMM (±0.01mm), Thread Gauge (Go/No-Go), Visual (10x Magnification, ISO 14971), Lot Sampling (AQL 1.0)

Technical Advantages

In automated dialysis modules, the Dialysis Machine Clamp must integrate seamlessly with motor-driven or solenoid-based occlusion mechanisms. This requires dimensional precision for actuation interface points, typically within ±0.15 mm, to ensure reliable clamp engagement without misalignment or excessive drag. The Dialysis Machine Clamp must also provide a predictable force-deflection response, maintaining 10–15 N of closing force under load with minimal hysteresis.  

Repeated sterilization through autoclaving, gamma irradiation, or ethylene oxide can degrade polymers through oxidation or hydrolysis. The Dialysis Machine Clamp must therefore be manufactured from sterilization-stable materials such as stabilized PPSU, modified PEEK, or high-Tg polyimides. These materials preserve mechanical properties post-sterilization and resist embrittlement, surface microcracking, or dimensional warping. 

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Industry Applications

Peristaltic Pump Tube Occlusion

Used to mechanically isolate flow paths in peristaltic pump loops, preventing reverse flow during system idle or emergency shutdown. 

Venous Line Flow Interruption Control

Applied to terminate venous blood return during alarms, priming, or disconnect procedures to maintain hemodynamic safety. 

Arterial Line Securement and Flow Cutoff

Used to occlude arterial lines when disconnecting extracorporeal circuits or initiating system pressure equalization protocols. 

Automated Clamp Integration in Hemodialysis Machines

Integrated into electromechanical actuators to provide precise, programmable occlusion timing during dialysis treatment cycles and automated self-tests. 

Dialysate Pathway Isolation During Priming

Employed to block dialysate lines during fluid priming sequences, ensuring air elimination and accurate volumetric displacement verification. 

Heparin Dosing Line Isolation

Prevents unwanted heparin flow by securing tubing during inactive dosing phases, ensuring compliance with controlled anticoagulation delivery. 

Dialysis Machine Clamp

System Integration and Assembly Compatibility

OEM system integration demands that each Dialysis Machine Clamp supports fast, repeatable assembly with minimal tolerance stack-up. Components must feature interface geometries such as indexed mounting flanges or keyed alignment tabs for precise placement within the machine chassis or tubing manifold. The Dialysis Machine Clamp’s overall dimensional envelope must conform to system-specific spatial constraints, typically within ±0.05 mm on mounting features.  

Precise control of fluid flow occlusion is fundamental to prevent retrograde flow, over-infusion, or inadvertent cross-contamination in dialysis systems. The Dialysis Machine Clamp must deliver highly repeatable occlusion behavior across its entire operational lifespan, maintaining full closure of compliant tubing without permanent deformation or leakage under negative pressure. Critical parameters such as clamp arm stiffness, jaw curvature, and closure velocity directly influence flow shutoff integrity. 

 

Dialysis Machine Clamp

Having Doubts? Our FAQ

Check all our Frequently Asked Question

How does Frigate ensure dimensional accuracy in dialysis machine clamps for automated assembly lines?

Frigate uses CNC-machined mold tooling and tight process control to maintain dimensional tolerances within ±0.05 mm on functional features. This precision allows direct compatibility with robotic assembly systems and automated occlusion modules. Coordinate Measuring Machines (CMM) are used for in-process and final inspection. Consistency across batches ensures reliable actuation and fit in high-volume production environments. 

What materials does Frigate use to improve fatigue resistance in high-cycle clamp actuation?

Frigate selects high-performance polymers like 30% glass-filled polyetherimide or modified PEEK for applications requiring over 20,000 open-close cycles. These materials exhibit high flexural fatigue strength and low creep under continuous load. Material selection is guided by thermal aging tests and simulated mechanical cycling. This results in clamps that retain force and alignment over long operational periods. 

 

How does Frigate validate the occlusion force range for different tubing types?

Frigate performs bench testing using medical-grade PVC and silicone tubing under simulated pressure and flow conditions. Clamp closure forces are calibrated to achieve full occlusion without damaging the lumen across a range of wall thicknesses. Force-displacement curves are generated to verify mechanical response. All force parameters are documented to support integration with OEM dialysis systems. 

 

What measures does Frigate take to prevent clamp failure during sterilization cycles?

Frigate tests clamp materials for thermal and chemical stability using accelerated aging protocols. Materials are selected based on their resistance to autoclave, ETO, and gamma sterilization without dimensional warping or brittleness. Post-sterilization parts are inspected for stress cracking and loss of mechanical function. This ensures long-term usability in clinical environments with repeated disinfection requirements. 

 

Can Frigate provide custom clamp designs for proprietary dialysis equipment?

Frigate supports custom clamp geometries, hinge designs, and mounting interfaces tailored to specific dialysis machine layouts. CAD models and prototypes are developed using OEM specifications and validated through functional testing. Tooling is built in-house to control critical dimensions and short lead times. Custom development includes full documentation for regulatory compliance and device integration. 

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LOCATIONS

Global Sales Office

818, Preakness lane, Coppell, Texas, USA – 75019

Registered Office

10-A, First Floor, V.V Complex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, India.

Operations Office

9/1, Poonthottam Nagar, Ramanandha Nagar, Saravanampatti, Coimbatore-641035, Tamil Nadu, India. ㅤ

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Dialysis Machine Clamp

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