Liverani S/P & MID Flexible Impeller Pump
Abrasive Solids & Food Grade Pump
Key Specifications | |
---|---|
Max Flow Rate | 690lpm |
Max Head | 27M |
Max Temperature | 100°C |
Max Viscosity | 50,000 cP |
Solids | 25mm |
Size | 3/4" 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.
Features of the S/P & MID Series Flexible Vane Pump:
- Bareshaft (S/P) and hydraulic drive (MID) flexible impeller pumps
- Pulsation free pumping action ensures easy pumping of shear sensitive liquids
- Solids passage capability - 10mm (MINOR) 15mm (MAJOR) 25mm (MAXI)
- Self priming up to 6m without the need of a non return valve.
- Flexible impeller pump head can be rotated and mounted in several positions.
- Wide range of impeller materials to cover almost any application: NBR / Neoprene / EPDM / Natural Rubber / Silicon
- Twin Head System (2Q & 2H) can be fitted to the MAXI for doubling flow or head.
- 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.
- Pump can be ordered with the connections facing in the position required (V, 90D, 90S).
- Pump heads are SS304 as standard for MINOR, MAJOR & MAXI (SS316 for MINI). SS 316 available.
- Connections are Garolla as standard for MINOR, MAJOR & MAXI (BSP M for MINI & MIDEX). Others available.
- Optional manual By-Passes (MINI, MAJOR & MAXI) for manual adjustment of the flexible vane pump capacity available.
- Spring loaded bypass for the MINOR for manual adjustment of the pump capacity as well as operation with a nozzle.
- Automatic barrel filling kits with stainless steel nozzle, non return valve & pressure switch can be supplied for applications where barrel or container filling is required.
- Accessories include inverter drive for variable speed operation, dry run protection, pressure switch for automatic pumping, level sensors, remote control & radio operation.
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.