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Cole-Parmer Technical Library

Masterflex® Tubing Pump
Application Tips

The helpful hints listed below are to assist Masterflex users
when selecting or applying Masterflex tubing pumps.

Pumping Viscous Fluids
To Reduce Pulsation
Tubing Compatibility
To Increase Tubing Life
Pumping Abrasive Fluids
Tubing Selection Hints

 

Pumping Viscous Fluids

  • Peristaltic tubing pumps are ideal for pumping viscous fluids
  • Choose a larger tubing size than required for pumping water
  • Slow down the speed of your pump
  • Use adjustable occlusion pump
         — Over-occlude to prime
         — Reduce occlusion to increase life
  • Pressurize the inlet
  • Firm tubing (Norprene®, PharMed®, Viton®, and Tygon® LFL) works best
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To Reduce Pulsation

  • Use pulse dampener
  • Use adjustable occlusion pump
         — Reduce occlusion to increase life
         — Apply back pressure
  • Use dual heads with offset rollers
  • Add extra discharge tubing to your pumping system
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Tubing Compatibility

  • See Chemical Compatibility charts
  • Always pretest with unknown or marginal chemicals
  • Immersion test recommended:
    1. Cut samples of tubing.
    2. Weigh, measure length (use other characteristics also if possible).
    3. Immerse for 48 hours in closed vessel.
    4. Examine for swelling, brittleness, cracking, softness & other forms of breakdown. If no change in the tubing, try in pump.
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To Increase Tubing Life

  • Run larger tubing sizes at slower speeds
  • Reduce occlusion
  • Use Masterflex High-performance precision tubing
  • Select longer life material (Norprene, PharMed, Tygon LFL, BioPharm Plus platinum-cured silicone)
  • Reduce pressure in system
  • Stop pump periodically, move tubing 20-25 cm (8-10 in) forward
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Pumping Abrasive Fluids

  • Keep soft particle sizes ‹25% of tube ID
  • Keep hard particle sizes ‹5% of tube ID
  • Reduce the speed of your pump—the slower the better
  • Use adjustable occlusion pump
         — Over-occlude to prime
         — Reduce occlusion for increased life
  • Abrasion-resistant tubing such as Norprene/PharMed and Viton work best
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Tubing Selection Hints

  • Longest-life—Norprene/PharMed, BioPharm Plus silicone
  • Clarity— Tygon/Silicone
  • USP Class VI—PharMed/Silicone/C-Flex, Tygon LFL
  • High-purity— Silicone (Platinum-cured)
  • Pressure/Vacuum—High-Pressure Norprene, High-Pressure PharMed, Norprene/PharMed/Tygon
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Related Links: Printer-friendly page

Complete Selection of Masterflex Peristaltic Pumps

Fluid Fundamentals
General Pump FAQs
How to Read a Pump Curve
Hydraulic Fundamentals
Liquid Pumps General Information
Liquid Pumps—Viscosity Handling Characteristics
Masterflex® Tubing Pump Application Tips
Peristaltic Pumps—Matching the Tubing to the Fluid
Quick Couplings Selection Guide

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