Peristaltic hose pumps are a type of positive displacement pump which operate on the principle of ‘peristalsis’. These pumps are used in a wide range of industries due to their pumping action and unique features.
Peristalsis refers to the pumping principle of peristaltic hose pump. These pumps consist of a casing that is partly filled with lubricant and coolant, as well as a flexible hose which is squeezed by alternating shoes to draw product in and then push it out of the pump.
They are a self-priming pump, which can run dry without damage and can also be reversed to clear any blockages within the hose. These pumps are suitable for dosing at pressures up to 16 bar or 230 psi.
Peristaltic pumps are commonly used with the following contents:
- highly viscous products
- liquids with high concentrations of solids
- abrasive of highly corrosive products
- sheer sensitive products
The pumps hose, which features fibre reinforcement, receives the liquid which is brought through the pump via a gentle pumping action. Contaminants are avoided as the fluid being pumped only comes into contact with the hose. Food grade standards are also available. The pumping action is created by the shoes as they alternately rotate, creating a vacuum which draws the fluid through the hose. The volume of product pumped is determined by the hose bore size, viscosity of the fluid and pump speed.
Peristaltic Pumps: Setup and Application