Here at Tapflo, we feel that Flexible Impeller Pumps might not always get the credit they deserve, so we’re here to give you a list of benefits, highlighting why we think you should consider using a Flexible Impeller Pump.

What is a Flexible Impeller?

A Flexible Impeller is a Positive Displacement Pump that is sometimes also known as a Flexible Vane Pump.

How does an impeller pump work

How does a Flexible Impeller work?

Inside the pump, the impeller rotates whilst the flexible vanes of the impeller bend to fit to the pump casing. As the impeller rotates, fluid is trapped between the vanes and pushed forwards towards the outlet port.

What are the Benefits of using a Flexible Impeller?

  1. 1. Flexible Impeller Pumps are customisable.

Each Flexible Vane Pump can be customised to your businesses particular operational requirement. This includes the execution style of the pump, as well as the material that the impeller can be manufactured from.  

One of the main advantages of a Flexible Impeller is that it can be fitted to a number of executions including with Geared Motors, Trolley Mounted with various controls or Hydraulically Driven. For a full list of pump executions, head over to our Flexible Impeller Pump product page.

Impeller materials can be chosen based on the application of your pump. For example, for a customer pumping a hot acid might require an EPDM Impeller, whereas a customer pumping oil might require a NBR Impeller. See below for a full list of materials and applications.

Impeller Material



 FDA approved with excellent resistance to oils and fats


 Best option for customers requiring chemical AND mechanical resistance


 FDA approved, ideal for hot fluids and CIP. Excellent with acids and alkalis


 Has the highest mechanical resistance and is ideal for water-based fluids at room temperature


 Ideal for high temperatures and low mechanical resistance


  1. 2. Flexible Impeller Pumps are extremely versatile.

The customisation of a Flexible Impeller means that it is extremely versatile.

Impeller Pumps are ideal for the following applications:

  • - Transferring
  • - Filling
  • - Emptying
  • - Recycling & Mixing
  • - Filtering & Separation
  • - Metering & Dosing

Flexible Impellers are typically used in the following industries:

  • Oenological
  • - Food
  • - Chemical
  • - Cosmetic and Pharmaceutical

Impeller Pumps are ideal for handling shear sensitive viscous products, as well as those with solids in suspension. The pumps can handle up to 50’000 cPs and the solids passage capability is up to 25mm, but please check this on our product pages for the specific maximum solid sizes. 

Flexible Impellers have reversible operation

An added benefit that highlights the versatility of a Flexible Impeller is the pump head’s ability to operate bi-directionally. The head can be reversed simply by the flicking a switch on the terminal box of the motor, making the pump ideal for cleaning purposes and refilling upon completion.

Rotation options for Flexible Impeller

Rotation of the Pump Head

Not only can the operating direction of the pump be altered, but also the rotation of the pump head itself can be changed into 5 different positions. The motor for the pump can be mounted below or above the pump head which, paired with the pump head’s possible 5 positions, enables a Flexible Impeller to be installed into a variety of pipework configurations.

  1. 3. Flexible Impeller Pumps are Self-Priming

These pumps can self-prime up to 6m from dry which allows Impeller Pumps to be used for emptying of sumps, tanks, drums and IBCs.

  1. 4. Flexible Impellers provide Pulse Free Pumping

The pump produces a steady flow which is ideal for applications such as filling, dosing and filtration.

Still have a few questions? Head over to our Flexible Impeller Pump FAQ.

If you require any additional information, you can open the chat in the bottom right hand corner of the screen where you can get instant access to the Tapflo Team.

Alternatively, you can get in Contact with the team via email or telephone.

E: [email protected]

T: 023 8025 2325




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