Peristaltic hose pumps are a type of positive displacement pump that move fluids through a flexible hose or tube, using rotating rollers or shoes to compress the hose in a wave-like motion. This “peristaltic action” mimics biological systems like the human digestive tract, delivering precise, low-shear, and contamination-free pumping.
Principle of Operation
A circular housing contains a reinforced rubber hose.
Rotating rollers or shoes compress the hose against the pump casing.
As the roller passes, the hose returns to its original shape, drawing in fluid.
This cycle creates a strong vacuum and pushes the fluid forward.
Key Characteristics:
- Only the inner hose surface contacts the fluid.
- No seals, valves, or glands in the flow path.
- Flow is created by compression and relaxation of the hose.
Advantages
- Dry-run capable: No damage from running without fluid.
- Self-priming: Suction lift up to 9m depending on model.
- Accurate dosing: ±1% flow repeatability in many models.
- Handles abrasives and solids: Ideal for slurries and viscous fluids.
- Gentle on shear-sensitive fluids: Great for food, chemicals, and biologicals.
- Reversible flow: Flow direction can be changed by reversing motor.
- Low maintenance: No seals, glands, or check valves to service.
Applications
Mining
Thickener underflow
Flocculant and reagent dosing
Tailings transfer
Grit/sludge pumping
Industrial
Ceramic slurry transfer
Pigments and paints
Lime slurry dosing
Waste handling and chemical neutralisation
Food & Beverage
Fruit concentrates
Yeast, mash, and culture transfer
Cleaning agents (CIP chemicals)
Viscous sauces or pastes
Water & Wastewater
Polymer dosing
Sludge transfer
pH adjustment chemicals
Selection Tips
Choose reinforced hoses for high pressure and abrasion.
Consider roller vs. shoe design based on duty cycle and hose life.
Use lubricated casings for heavy-duty industrial use.
Check compatibility between hose material and fluid (e.g., NR, EPDM, Hypalon).
Optional Add-Ons
Hose life monitoring sensors
Pulsation dampeners
VFDs for flow control
Quick-change hose assemblies