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Liverani GR Flexible Impeller Pump

Shear Sensitive Pump & Hygienic Pump

Liverani GR Flexible Impeller PumpLiverani GR Flexible Impeller Pump
Flow Rate Up to 44 m³/Hr
Max Head (pressure) Up to 24 M
Max Temperature Max. 100°C
Max Viscosity Up to 50,000 cP
Outlet Sizes 1” BSP F up to DN 100 mm


Flow Rate Up to 44 m³/Hr
Max Head (pressure) Up to 24 M
Max Temperature Max. 100°C
Max Viscosity Up to 50,000 cP
Outlet Sizes 1” BSP F up to DN 100 mm

The Liverani GR Flexible Impeller Pumps are a range of belt driven models, able to handle a wide variety of fluids. This is a cost effective means of operating the flexible vane pumps at different speeds without the use of an expensive gearbox. Furthermore, when using GR flexible vane pumps on viscous or solids laden fluids the belt drive will protect the motor from overloading by slipping, therefore avoiding potentially lengthy and costly downtimes. 

Flexible impeller pumps are part of the positive displacement pump family and are otherwise known as flexible vane pumps. These pumps are capable of dry self-priming making them a popular choice for applications where good suction lift capacity is needed. These flexible impeller pumps are commonly used for viscous fluids, slurries and liquids containing solids and gas in low pressure applications. Due to their hygienic construction they are also popular as a sanitary pump.

Flexible impeller pumps are similar in operation to a centrifugal model, but thanks to their flexible rubber impellers are able to bend and provide a smooth flow even when handling viscous fluids containing solids.

For more information on the design of flexible vane pumps and how they operate, read our guide

  • Belt driven flexible impeller pump
  • Gentle, pulsation free pumping mechanism ensures the handling of shear sensitive liquids.
  • Solids passage capability - 10mm (MINOR), 15mm (MAJOR), 25mm (MAXI)
  • Dry self priming up to 6m without the need of a non return valve.
  • Pumps can be operated in either direction via a reversing switch mounted on the pump.
  • Specific models are available with 2 speed operation, controllable via a rocker switch on the terminal box.
  • Pump head can be rotated and installed in a range of positions for versatility.
  • Wide range of connection types available including DIN, BSP Male & Female, Triclover, SMS, RJT, Friederich, Garolla, and Macron
  • Optional Stainless Steel AISI 304 Pipe Fittings for easy installation of the pump into existing pipework to match any of the above connection types.
  • Flexible vane pump heads are SS304 as standard. SS 316 available on request,
  • NOTE: units are supplied with Garolla connections as standard with hose fittings, clamps and seals included.
  • Unit can be supplied with or without a control panel as well as fitted with dry-run protection (50ºC is the standard set temperature however 70ºC & 90ºC options are available on request and must be pointed out at order stage). Selection of this is determined by the fluid temperature. 
  • Manual by-passes (MAJOR & MAXI) for manual adjustment of the flexible impeller pump capacity available on request. To maintain the self-priming abilities of the pump the by-pass must be completely closed on initial start-up.
  • Spring loaded by-pass for the MINOR for manual adjustment of the capacity and use with a nozzle.

  • Automatic barrel 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. 

Key Benefits:

      

  • GR MINOR 40 – 1.5Kw, 1-3 phase 230-400v, single speed operation. 300 rpm. Max Flow 2150 L/h, max head 16M.
  • GR MINOR 40 – 1.5Kw, 1-3 phase 230-400v, single speed operation. 470 rpm. Max Flow 3300 L/h, max head 18M.
  • GR MINOR 40 - 1.5Kw, 1-3 phase 230-400v, single speed operation. 700 rpm. Max Flow 4700 L/h, max head 20M.
  • GR MINOR 40 - 1.6Kw, 3 phase 230-400v, 2 speed operation. 470 rpm. Max Flow 3300 L/h, max head 18M.
  • GR MINOR 40 – 0.9Kw, 3 phase 230-400v, 2 speed operation. 235 rpm. Max Flow 1600 L/h, max head 12M.
  • GR MINOR 40 – 2.2Kw, 3 phase 230-400v, 2 speed operation. 700 rpm. Max Flow 4700 L/h, max head 20M.
  • GR MINOR 40 – 1.5Kw, 3 phase 230-400v, 2 speed operation. 350 rpm. Max Flow 2500 L/h, max head 16M.
  • GR MAJOR 60 – 1.5Kw, 1-3 phase 230-400v, single speed operation. 470 rpm. Max Flow 10500 L/h, max head 12M.
  • GR MAJOR 60 – 1.86Kw, 3 phase 230-400v, single speed operation. 700 rpm. Max Flow 15000 L/h, max head 16M.
  • GR MAJOR 60 – 0.9Kw, 3 phase 230-400v, 2 speed operation. 235 rpm. Max Flow 5100 L/h, max head 8M.
  • GR MAJOR 60 – 2.2Kw, 3 phase 230-400v, 2 speed operation. 700 rpm. Max Flow 15000 L/h, max head 16M.
  • GR MAJOR 60 – 1.5Kw, 3 phase 230-400v, 2 speed operation. 350 rpm. Max Flow 7800 L/h, max head 12M.
  • GR MAXI 80 - 4Kw, 3 phase 230-400v, single speed operation. 470 rpm. Max Flow 34200 L/h, max head 16M.
  • GR MAXI 80 - 4Kw, 3 phase 230-400v, single speed operation. 600 rpm. Max Flow 41400 L/h, max head 16M.

Material options for the GR flexible impeller sanitary pump:

Description Stainless Steel AISI 304 Stainless Steel AISI 316 Nitrile (NBR) Natural Rubber (NR) Neoprene (CR) EPDM Silicon (VMQ) St. St. / Graphite / NBR Tungsten Carbide / NBR Tungsten Carbide / Viton
Part List
Pump Body X X
Impeller X X X X X
Mechanical Seal X X X

** NOTES

1.Changes in Mechanical Seal Materials are at cost. All pumps are supplied with Ceramic / Graphite / NBR as standard.

2.Changes in Impeller Materials are Free of Charge. All pumps are supplied with Natural Rubber Impellers as standard.

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