Permeability of the tube material is relevant to peristaltic pumping when handling fluids or gases that are to be analysed for their gas content, or where there is a chance of a gas permeating into the fluid and causing a reaction.
Note that the higher the value, the more gas will permeate through the tube wall. Silicone is the most permeable material in the range and Tygon the least.
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Low |
High |
Bioprene® |  |
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STA-PURE PFL |
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Fluorel® |
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Marprene® | |
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Neoprene |
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Pumpsil® | |
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PVC |
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Silicone | |
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STA-PURE PCS | |
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Style 400® | |
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The information in the table below was supplied by the manufacturer of the base material. There may be variations caused by compounding and the extrusion process of the final product.
| Gas | Bioprene | Marprene | Neoprene | Pumpsil | PVC | Fluorel |
| Units cc / cm2 / cm / s / atm at 23C |
Air | 2.78 x 10-8 | 2.78 x 10-8 | 1.4 x 10-8 | 2.39 x 10-6 | 2.28 x 10-10 to 3.65 x 10-9 | 5 x 10-9 |
N2 | 2.24 x 10-8 | 2.24 x 10-8 | 1 x 10-8 | 1.85 x 10-6 | 1.52 x 10-10 to 2.28 x 10-9 | 3 x 10-9 |
O2 | 5.83 x 10-8 | 5.83 x 10-8 | 3 x 10-8 | 4.1 x 10-6 | 5.32 x 10-10 to 9.12 x 10-9 | 1.1 x 10-8 |
CO2 | 3.47 x 10-7 | 3.47 x 10-7 | 1.9 x 10-7 | 2.2 x 10-5 | 1.29 x 10-10 to 5.59 x 10-8 | 6 x 10-8 |
Helium | | | 1 x 10-7 | | | 16 x 10-8 |
Methane | | | 2 x 10-8 | | | |
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