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Flexible Impeller Pump Guide

Flexible Impeller Pump Guide


What is a Flexible Impeller Pump?

A Flexible Impeller Pump is a type of Positive Displacement Pump that you might not have heard much about, they are also sometimes known as a Flexible Vane Pump.

How does a Flexible Impeller Pump work?

How does an Impeller Pump work?

The Flexible Impeller Pump distributes the fluid being pump in a positive manner. This is achieved due to the design of the pump forcing fluid forwards after being trapped between the impeller vanes of the pump. The impellers rotate within the pump which forces the liquid towards the outlet from the discharge port within the pump and allows for a discharge pressure of up to 4 Bar.

What are the benefits of using an Impeller Pump?

Flexible Impeller Pump rotatable operation

Flexible Impeller Pump for Viscous Fluid

What are the benefits of using an Impeller Pump?

 What can a Flexible Impeller Pump be used for?

Flexible Impellers can be used for a variety of applications as they are an extremely versatile design of pump capable of handling viscous fluids, up to 50’000 cPs that contain solids, and shear sensitive liquids, without causing damage to the pump or the product.

Impeller Pumps can be used in the following industries:

Important things to note

Impeller Material


NBR Oil & fat resistant, FDA approved
CR Best balance between chemical & mechanical resistance
EPDM Best for hot products, CIP, acid & alkalis. FDA approved.
NR Highest mechanical resistance, ideal for water-based fluids at room temperature.
VMQ Best for high temperature, low mechanical resistance



If you’re in the market for a Flexible Impeller Pump for your application, it’s important to know which one of the many out there will work best for your application. Below is a list of some of the most popular Flexible vane pumps that TS Pumps can supply worldwide.


Frequently Asked Questions


1. Is an Impeller Pump easy to maintain? Flexible Impeller Pump

The simple answer? Yes. The fluid being transferred through your pump and the pressure being used will affect the wear and tear of the pump and will differentiate the schedule of maintenance for your pump.

Check the oil level in your pump regularly using the indicator positioned on the side of the pump. If your pump has a mechanical speed variator, we recommend that you replace the lubricating oil after 3000 working hours.

Your Impeller Pump should be cleaned after use to preserve the mechanical and sanitary features of the pump.


The pump body leaking – O-Ring and or the mechanical seal are worn out and will need to be replaced

Loss of capacity – Problems with the impeller and the front cover of the pump, this may be the issue if the loss of capacity isn’t due to electric failure. The front cover can be dismantled easily to check the condition of the impeller wings and the cover.

2. Is it easy to change the port orientation of an Impeller Pump?

One of the benefits of using a Flexible Impeller Pump is the ease with which the port orientation can be changed. Typically when using other pumps with impellers, like Centrifugal Pumps, the motor needs to be above the impeller, however, with a Flexible Impeller, the pump motor can go in any fitting to suit your installation.


Interested in viewing the whole range? Visit the Flexible Impeller Pumps page.

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