Thanks to their special design and lack of mechanical friction, peristaltic pumps are ideal for precise and sterile pumping of liquids. However, deposits in the tubing and the associated damage are a common problem. This article examines the mechanisms of deposit formation in peristaltic pump tubing and offers effective solutions for preventing this problem.
Introduction: The importance of hoses in peristaltic pumps
The hose is the heart of the peristaltic pump and plays an important role in performing the following functions:
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The only part that comes into contact with liquid.
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Create a flowing movement by contracting and expanding.
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Prevent cross-contamination
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Make sure you use the correct dosage.
When deposits build up in the hose, these functions are disrupted, which can lead to a number of problems.
Damage mechanism caused by deposits in peristaltic pump hoses
1. Low hose flexibility
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Internal deposits cause the hose walls to harden.
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reduced elasticity and deformation
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Increased mechanical stress at the bending point
2. Internal and external corrosion
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The sediment particles act as an abrasive.
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More friction between hose and cylinder.
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Causes minor scratches and cracks.
3. Change in the physical properties of a substance.
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Chemicals penetrate the polymer structure.
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low tensile strength
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great weakness
4. Blocking the flow
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Reducing the effective diameter of the hose
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Increased working pressure
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Reduce consumption and dosing accuracy
Types of deposits in peristaltic pump hoses
1. Mineral resources
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Calcium carbonate and calcium sulfate
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iron oxide
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Silicates
2. Biological deposits
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microbial biofilms
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Algae and fungi
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microbial metabolites
3. Chemical precipitation
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Polymer precipitation
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insoluble salts
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Chemical decomposition products
Factors that worsen the formation of deposits in hoses
1. Properties of liquids
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Insufficient pH value
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High concentration of precipitated ions
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Presence of suspended matter
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high viscosity
2. Operating conditions
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high temperature
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low consumption
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Long-term stay
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Irregular economic cycles
3. Hose type
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The material is not suitable for the specified purpose
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Long service life, no replacement required.
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Low quality of raw materials
Signs of sediment destruction in Khartoum
1. External signs
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The color of the hose has changed.
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Brittleness and surface cracks
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Low transparency of the transparent tube
2. Functional properties
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Reduce runoff
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increased noise and vibrations
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The need to increase work pressure
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Low dosing accuracy
3. Laboratory tests
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Particles in the outlet liquid
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Changes in the chemical composition of the liquid
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greater resistance to current
Solutions to prevent deposits
1. Choose the right hose.
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Compatible materials : nylon, thiogon , silicone or special PVC.
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Applicable fish : Suitable for working pressure.
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Smooth inner surface : reduces deposit points.
2. Improving working conditions
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Liquid temperature control : Avoiding critical temperatures
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Correct flow rate : prevents fluid stagnation
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Cleaning procedure : after every prolonged period of inactivity.
3. Liquid cleaning
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Adequate filtration : removal of suspended particles
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pH control : within acceptable range
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Use of inhibitors : for metal precipitation
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Fungicides : control the growth of microorganisms
4. Preventive maintenance plan
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Replace hoses regularly before their service life expires.
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Regular inspections : Look for early signs of deposits
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Write performance parameters : Gradual change detection
How to clean a clogged hose
1. Mechanical method
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Pressure cleaning : to remove loose deposits
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Soft brush : for removing sticky deposits
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Ultrasound : for cutting tubes
2. Chemical methods
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Dilute acid solution : for mineral deposits
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Alkaline solution : for organic deposits
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Special solvent : suitable for tank type
3. Survey methods
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Periods of chemical and mechanical cleaning
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Use a CIP (Clean in Place) system
Comparison of the deposit resistance of different hoses
| Khartoum material | chemical resistance | Anti-sediment | Best before [date |
|---|---|---|---|
| silicone | half | fewer | short |
| Teojun | Great | Yes | long |
| nylon | Yes | half | half |
| Polyvinyl chloride | half | half | half |
New technology for peristaltic tubes
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Nano coating : reduces the adhesion of deposits
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Composite materials : increased chemical resistance
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Antimicrobial surfaces : preventing the formation of biofilms
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Smart hose : changes color when deposits are present
Northridgepumps peristaltic pump brochure
Preventive maintenance program for hoses
a) Daily check:
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Visual inspection to detect changes in appearance
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Pump power control
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Pay attention to unusual noises.
b) Weekly check:
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Hose flexibility test
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Check for low pressure.
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Control of measurement accuracy
c) Monthly check:
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Detailed inspection of the interior surface
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Material strength testing
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preventive exchange
Safety tips for replacing and cleaning hoses
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Disconnect the pump from the power supply before carrying out any repair work .
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Use of personal protective equipment : gloves and safety glasses.
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Ensure adequate ventilation : When handling chemicals.
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Safe disposal of used hoses
Finally
Dirt buildup in peristaltic pump hoses is a serious problem that can impair performance, increase repair costs, and even lead to fluid contamination. Understanding the mechanisms of hose failure and taking preventative measures can significantly extend hose life.
Three basic principles of sludge management in hoses:
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Prevent limescale deposits by choosing suitable materials and conditions.
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Early detection of deposits and signs of damage
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Fast response and timely cleaning or replacement.
By following the recommendations in this article and implementing a preventative maintenance program, you can ensure optimal performance and longevity of your peristaltic pump tubing.