Liverani VA Flexible Impeller Pump

Abrasive Solids & Food Grade Pump

Key Specifications
Max Flow Rate 690lpm
Max Head 24M
Max Temperature 100°C
Max Viscosity 50,000 cP
Solids 25mm
Size 1” to 4"
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The Liverani VA Flexible Impeller Pump is a mechanically controlled, low cost variable speed offering. With this option you able to vary the flow capability by means of manually adjusting the output speed on the gear box via a dial. With the VA flexible vane pump series, flow control is not quite as accurate as the INV flexible impeller pump, but offers a decent flow range adjustment. The wheel on the side of the adjuster displays a reference to the rotational speed.

Flexible impeller pumps are a very versatile in the applications that are suitable for thanks to several design benefits. Firstly, thanks to their supple vanes they are able to handle not only clean, light fluids, but also viscous, solid laden slurries. Secondly, the multiple materials the impellers are made out of mean they are compatible with many fluids e.g. NBR for fats and fuels, EPDM for chemicals and hot fluids and natural rubber for water based liquids. Flexible vane pumps with EPDM and NBR impellers are able to be supplied with FDA Certification, making them a popular electric food grade pump solution. Their low shear operation also makes the ideal for handling delicate fluids that can be altered by other pump designs.

Flexible impeller pumps are renowned for their dry self-priming capability, making them ideal for applications where good suction lift capacity is needed such as the emptying of tanks, sumps and other containers.

NOTE: The required speed must be preset before the flexible impeller pump is started and cannot be adjusted during operation.

For more information on the working principle and typical applications read our flexible impeller pump guide.

Features of the VA Series Flexible Vane Pump:

  • Flexible vane pump with mechanically controlled variable speed drive
  • Smooth, low pulsing flow for handling shear sensitive liquid
  • Solids passage capability - 10mm (MINOR), 15mm (MAJOR), 25mm (MAXI)
  • Self priming up to 6m without the need of a non return valve
  • Flexible impeller pumps can be run in both directions via a reversing switch mounted onto the panel
  • Pump head can be rotated and mounted in several positions
  • Wide range of connection types available including DIN, BSP Male & Female, Triclover, SMS, RJT, Friederich, Garolla, and Macron
  • Stainless Steel AISI 304 Pipe Fittings for easy integration of the pump into existing applications are available.
  • NOTE: units are supplied with Garolla connections as standard with hose fittings, clamps and seals included
  • Pump Heads are SS304 as standard. SS 316 available on request
  • Unit can be supplied with or without a control panel
  • Can be fitted with dry-run protection.
  • Automatic drum filling kits are available complete with stainless steel nozzle, non return valve & pressure switch
  • Accessories include inverter drive for variable speed operation, dry run protection, pressure switch for automatic pumping, level sensors, remote control & radio operation
  • Spring loaded by-pass for the MINOR for manual adjustment of the pump capacity as well as operation with a nozzle

VA Bullet Diagram.JPG

FAQs

Flexible impeller pumps are part of the positive displacement pump family. They consist of a rotating rubber impeller with supple vanes attached. As the casing is smaller than the vanes, they must bend and then straighten as the impeller turns to conform to shape of the pump internal walls. The vacuum created push the fluid round from the inlet to the outlet.

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