How to Choose Silicone Tubing for Peristaltic Pumps: A Practical Selection Guide

Selecting the correct tubing is essential for achieving accurate and reliable performance in peristaltic pump systems. This guide explains how to choose silicone tubing for peristaltic pumps based on key technical and operational factors.

Inner Diameter and Wall Thickness

Tubing size directly affects flow rate and pumping accuracy.

• Inner diameter determines volume per rotation
• Wall thickness influences durability and compression recovery

Always match tubing dimensions to the pump head design.

Tubing Hardness and Elasticity

Silicone tubing hardness (often measured in Shore A) impacts:

• Pump efficiency
• Tubing lifespan
• Flow consistency

Softer tubing offers better sealing but may wear faster, while harder tubing lasts longer but requires higher compression force.

Chemical Compatibility

Although silicone tubing works well with many fluids, users should verify compatibility when handling:

• Oils
• Concentrated chemicals
• Solvents

Compatibility charts are useful references during tubing selection.

Operating Speed and Duty Cycle

Higher pump speeds increase tubing wear. For continuous operation:

• Use tubing rated for peristaltic applications
• Reduce speed where possible
• Implement scheduled tubing replacement

Maintenance and Replacement Tips

To maintain consistent performance:

• Inspect tubing regularly for fatigue
• Replace tubing before visible cracking appears
• Store spare tubing in a clean, cool environment

Conclusion

Choosing the right silicone tubing for peristaltic pumps involves more than material alone. By considering tubing size, hardness, chemical compatibility, and operating conditions, users can ensure reliable performance and extended service life.