Flow Rate | Up to 44 m³/Hr |
Max Head (pressure) | Up to 32 M |
Max Temperature | Max. 100°C |
Max Viscosity | Up to 50,000 cP |
Outlet Sizes | ¾” up to 3” |
Flow Rate | Up to 44 m³/Hr |
Max Head (pressure) | Up to 32 M |
Max Temperature | Max. 100°C |
Max Viscosity | Up to 50,000 cP |
Outlet Sizes | ¾” up to 3” |
The Liverani bareshaft S/P and hydraulically driven MID flexible impeller pumps are a type of rotary positive displacement pump. Their working principle is similar to that of a centrifugal pump however the impeller vanes are made of a flexible and durable polymer, which deform slightly as they move the liquid. This action enables fragile, shear sensitive fluids including high viscosity mediums containing particles. The SP and MID flexible vane pump models are frequently used on trucks, tractors and boats for a variety of transfer and offloading applications.
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. PTO drives are available for the S/P models and the MID flexible impeller pumps can be supplied with an Orbital Hydraulic Motor (50 CC) or with a coupling suitable for a Hydraulic Motor.
Read our guide for more information on the operating principle of a flexible impeller pump and its typical uses.
Material options for the S/P & MID flexible impeller sanitary pumps:
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.
3. EPDM and NBR impellers are available with FDA certification.
The beauty of the S/P & MID flexible impeller pump is it's versatility. Thanks to the following features it is an option that can be applied to many application requirements.
Flexible impeller pumps are a versatile design of pump for relatively low pressure applications, mainly with thanks to their impellers being produced in a wide range of materials for fluid compatibility including food grade applications. As the impellers are made of a supple, rubber type material that is able to bend, flexible vane pumps are also able to handle viscous fluids and those with solid content without causing damage. They also apply little shear to the pumped medium, making them suitable for shear sensitive fluids and their ability to be operated in reverse makes them ideal for tank to tank transfer. These design benefits make them suited to many applications including:
Marine Applications | Industrial Applications |
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Castle Pumps are fully accredited to enable you to buy with confidence. Our accreditation includes: A division of the CTS Group, Part of Flow Max Ltd.