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Flexible Impeller

Our high-performance Flexible Impeller Pumps manufactured by Liverani use high-quality rubber impellers & housed vanes and are designed for gentle, low-pressure fluid transfer. They excel in handling a range of viscosities and shear-sensitive fluids and solids in suspension, ensuring suitability for emptying tanks, drums & IBCs. They consist of a simple construction & few moving parts for a pulsation-free flow.

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Filter Results (10)
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All-In-One Flexible Impeller Pump

All-In-One Flexible Impeller Pump

Max. Temp

100C

Max. Head

18m

Max. flow

43.8m³/h

Materials

Metal

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Bare Shaft & Hydraulically Driven Flexible Impeller Pump

Bare Shaft & Hydraulically Driven Flexible Impeller Pump

Max. Temp

100C

Max. Head

32m

Max. flow

43.8m³/h

Materials

Metal

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EP Flexible Impeller Pump

EP Flexible Impeller Pump

Max. Temp

100C

Max. Head

32m

Max. flow

43.8m³/h

Materials

Metal

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Gearbox Drive Flexible Impeller Pump

Gearbox Drive Flexible Impeller Pump

Max. Temp

100C

Max. Head

40m

Max. flow

72m³/h

Materials

Metal

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Inverter Drive Flexible Impeller Pump

Inverter Drive Flexible Impeller Pump

Max. Temp

100C

Max. Head

30m

Max. flow

22.5m³/h

Materials

Metal

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Miniverter Flexible Impeller Pump

Miniverter Flexible Impeller Pump

Max. Temp

100C

Max. Head

32m

Max. flow

5.76m³/h

Materials

Metal

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V-Belt Drive Flexible Impeller Pump

V-Belt Drive Flexible Impeller Pump

Max. Temp

100C

Max. Head

24m

Max. flow

43.8m³/h

Materials

Metal

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VA & INV Flexible Impeller Pumps

VA & INV Flexible Impeller Pumps

Max. Temp

100C

Max. Head

40m

Max. flow

72m³/h

Materials

Metal

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Pony Plus Batch Controller

Pony Plus Batch Controller

Max. Temp

- C

Max. Head

400m

Max. flow

- m³/h

Materials

-

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Flexible Impeller Pump Accessories

Flexible Impeller Pump Accessories

Max. Temp

- C

Max. Head

- m

Max. flow

- m³/h

Materials

-

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What is a Flexible Impeller Pump?

Flexible Impeller Pumps are characterised by their unique construction and impressive technical specifications. These pumps, also known as Flexible Vane Pumps, feature an impeller made from high-quality rubber, complemented by vanes housed within the pump. This design feature means the pump can effortlessly handle thin and viscous fluids, and solids in suspension. The simple construction features only a few moving parts which in turn reduces downtime thanks to the simple maintenance requirements.

What is a Flexible Impeller Pump?

Flexible Impeller Pumps are characterised by their unique construction and impressive technical specifications. These pumps, also known as Flexible Vane Pumps, feature an impeller made from high-quality rubber, complemented by vanes housed within the pump. This design feature means the pump can effortlessly handle thin and viscous fluids, and solids in suspension. The simple construction features only a few moving parts which in turn reduces downtime thanks to the simple maintenance requirements.

Advantages of Flexible Impeller Pumps

All Tapflo Flexible Impeller Pumps can be fitted with food-grade mechanical seals and impellers for enhanced hygienic standards. Some key benefits of using Flexible Impeller Pumps are:
  • Flexible Impeller Pumps are highly customisable and can be tailored to suit specific operational requirements
  • Ideal for shear-sensitive viscous products and those with solids in suspension
  • Reversible operation
  • Self-priming capabilities
  • Suitable for emptying sumps, tanks, drums, and IBCs
  • Delivers pulsation-free flow for filling, dosing, and filtration applications
  • While these pumps are not ATEX-rated a standard, ATEX-rated motors are available on request

Are Flexible Impeller pumps self-priming?

Yes, Flexible Impeller pumps are self-priming, meaning they can create their own suction without the need for additional liquid or air.

Can Flexible Impeller Pumps run dry?

Yes, Flexible Impeller pumps can run dry up to 6m, which means they can operate momentarily without the presence of liquid through the pump.

Common Industries & Applications

  • Oenological
  • Food
  • Chemical
  • Cosmetics
  • Pharmaceutical

What are your Fluid & Media Transfer Characteristics?

To choose the appropriate Flexible Impeller Pump for your application, ask yourself the following questions:
  • What media will be pumped? Consider the chemical composition of the media you will be pumping – is it chemically neutral or corrosive, shear sensitive etc.
  • What is the viscosity of the media you intend to pump? Consider viscosity limitations, shear sensitivity etc.
  • Do you need to pump fluids containing solids?
  • Is your environment or fluid explosive?
  • Do you require CIP/SIP?
  • Do you require self-priming capabilities

Impeller Materials Available

  • NBR: Excellent resistance to Oils & fats, FDA-approved
  • CR: Ideal for chemical and mechanical resistance
  • EPDM: Used for hot liquids and CIP, FDA-approved, ideal for acids and alkalis
  • NR: Best mechanical resistance, ideal for room temperature water-based fluids
  • VMQ: Used for high temperatures with low mechanical resistance
Some of our materials offer an ATEX option on request for explosive applications and environments.

Are Flexible Impeller Pumps suitable for hygienic applications?

Some Flexible Impeller Pumps are suitable for food and beverage applications, including breweries and wineries. We may recommend a different range for more complex hygienic applications.

What’s the difference between a Flexible Impeller Pump and a Centrifugal Pump?

Both pumps feature rotating impellers that displace fluids, however, the way they operate differs. Flexible impeller pumps feature rotating impellers that create a vacuum to transport the fluid. The impeller inside the Centrifugal Pump doesn’t create a vacuum but instead manually forces the product in and out of the pump. Your application will determine which pump is more suitable for your needs.

What accessories are available for a Flexible Impeller Pump?

Our range of Flexible Impeller pumps can be equipped with stainless steel trolleys for ease of transportation, batch controllers, dry-run protection, by-pass valves and more. These accessories are designed to enhance efficiency, versatility and ease of use.

Maintenance Required to Keep your Flexible Impeller Pumps Running

  • Visual inspections of the casing, impellers and vanes to check for signs of leaks or damage
  • Ensure proper alignment of the shaft
  • Ensure the shaft seals and gaskets are replaced if worn or damaged
  • Grease/lubricate bearings and shafts
  • Inspect electrical wirings and connections for signs of damage
  • Ensure flows and pressures are accurate
  • Listen for excessive noise as this could indicate a mechanical issue
Depending on the size of your pump and the fluid you are pumping, a more detailed maintenance schedule may be required.

Additional Factors to Consider

  • Will your pump be stationary, or do you need it to be portable? If you require portability, Flexible Impeller Pumps can be fitted to trolleys of any size to suit your needs.