Understanding Spallation in Peristaltic Pumps

One of the most critical but often understated aspects of spallation is its variability. The rate of spallation generation and the size of the resulting particles can vary significantly, even within the same material family. For example:

• Not all Polyvinyl chloride (PVC) formulations exhibit the same spallation characteristics.
• Silicone tubing, despite being from the same material class, can perform drastically differently based on its specific formulation.
• Thermoplastic elastomers (TPEs) highly effective options for minimizing spallation, with performance metrics often surpassing those of PVC and silicone in demanding applications.

Factors such as polymer durometer, crosslink density, modulus, and catalyst systems for silicones, and the choice of plasticizers, stabilizers, and resin types in PVC, can all impact spallation profiles. In the case of TPEs, their unique composition allows for exceptional resistance to wear and particle shedding, making them ideal for applications requiring both cleanliness and durability.

Spallation is inevitable in peristaltic pumping, but understanding its implications is crucial for optimizing performance and safety across different applications:

Pharmaceutical Applications:

• Smaller particles may interfere with drug manufacturing processes, impacting the purity or efficacy of the final product.
• Larger particles are typically easier to filter out but still require monitoring to ensure compliance with quality standards.

Medical Procedures:

• Larger particles pose a greater risk in medical procedures where fluid directly interacts with patients, potentially leading to adverse health events.
• Smaller particles are less likely to cause immediate harm but must be a consideration for long-term patient safety.

Despite extensive research into spallation in medical procedures, much of the existing literature focuses on broad material classes rather than the nuances within each family. However, the performance of tubing in high-stress applications is deeply influenced by specific material formulations.

For example:

• Silicone Tubing: Variations in durometer, crosslink density, and curing systems can significantly alter spallation behavior.
• PVC Tubing: The choice of plasticizers, stabilizers, and resin types affects how the material wears and/or sheds particles under mechanical stress.
• TPE Tubing: These materials excel in spallation resistance and overall durability, delivering superior performance for critical applications where cleanliness and tubing longevity are paramount.

These differences highlight the importance of working with a knowledgeable tubing manufacturer who can tailor formulations to balance pump performance and spallation requirements for your specific application.

Why Collaboration Matters

If you rely solely on material families to assess spallation profiles, you may miss opportunities to optimize both pump performance and spallation characteristics. Collaborating with a tubing manufacturer who understands the interplay between material properties and application demands is essential. This collaboration enables you to:

• Select formulations that meet your spallation and performance needs.
• Address specific concerns related to particle size and generation rates.
• Ensure compliance with industry standards and enhance overall system reliability.

Spallation is more than just a byproduct of peristaltic pumping; it’s a critical performance metric that influences system efficiency, product quality, and patient safety. By understanding the variability in spallation within material families and working with an experienced tubing manufacturer, you can achieve a balance between optimal pump performance and minimized spallation. For industries where precision and reliability are paramount, taking a closer look at spallation isn’t just important—it’s essential.