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Flexible Impeller Pump Guide

Guide To: Flexible Impeller Pumps

Flexible impeller pumps, also known as flexible vane pumps, are a form of positive displacement pump. Here at TS Pumps we have a wide range of pumps suitable to an array of different applications across multiple industries.


What is a Flexible Impeller Pump?

A Flexible Impeller Pump is a type of Positive Displacement Pump.


How does a Flexible Impeller Pump work?

The Flexible Impeller Pump distributes the fluid being pumped in a positive manner. This is achieved thanks to the design of the pump which forces 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 a Flexible Impeller Pump?

Flexible Impeller Pumps can self-prime up to 6m. This allows the pump to be used for unloading sumps, tanks, drums and IBCs. Due to the positive displacement design of the pump, there is no need for the pump to be manually primed or to be fitted with a non-return valve.

The design of a Flexible Impeller Pump also allows for pulse-free operation due to the impellers within the pump rotating at a steady rate, meaning that a Flexible Impeller provides a smoother flow output than other pumps on the market.


What industries and applications can the Flexible Impeller Pump be used for?

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.

Flexible Impeller Pumps can be used in the following industries:


Important Information


Impeller Material Application
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



Is a Flexible Impeller Pump easy to maintain?

Absolutely, 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.

Self-Priming Flexible Impeller Pump

Self-Priming Flexible Impeller Pump

If your pump has a mechanical speed variator, we recommend that you replace the lubricating oil after 3000 working hours. Your Flexible Impeller Pump should be cleaned after use to preserve the mechanical and sanitary features of the pump.

Is it easy to change the port orientation of a Flexible 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.


At TS Pumps we specialise in the supply and service of industrial pumps and systems into key industries and markets, so if this pump isn’t quite right for you, you can read more about our full range of pumps here or contact our team today to discuss your business requirements.

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