LIVERANI - Impeller pump (MID)

The LIVERANI MID pump is a self-priming impeller pump driven by a hydraulic orbital motor. Manufacturer: LIVERANI s.r.l. (Via De’ Brozzi 94, 48022 Lugo, Province of Ravenna, Italy). The company was founded in the 1950s and manufactures pumps and continuous presses for viscous liquids and media containing solid particles. The equipment is manufactured in accordance with CE standards.

The MID series consists of a pump unit without its own electric motor. Rotation is provided by an external hydraulic motor connected to the machine’s hydraulic system or a separate power unit. This distinguishes the MID series from the other LIVERANI series, which are electrically driven.

LIVERANI MID pump: technical specifications

The manufacturer specifies the values for head, temperature, viscosity, self-priming and reverse flow for the entire LIVERANI range of impeller pumps. The range as a whole covers flow rates from 0 to 72,000 litres per hour.

What does a drive from a hydraulic orbital motor mean?

The MID pump does not have an electric motor. In place of the drive, there is a flange for a hydraulic orbital motor with a Ø25 mm shaft and a Ø82.5 flange secured by eight M12 studs.

The rotation is provided by the hydraulic system of the machine on which the pump is mounted. This could be a tractor, a self-propelled platform, a tanker, a trailer or a stationary hydraulic power unit.

There are three practical implications. Firstly, the pump operates in places where there is no mains electricity supply. These include fields, vineyards, temporary sites and vehicles. Secondly, the speed is regulated by the hydraulic flow, meaning that the flow rate can be adjusted without the need for a frequency converter. Thirdly, the pump has no electrical components of its own, so the issue of explosion protection for the motor is eliminated.

The limitation is also obvious. The pump does not operate independently: it requires a hydraulic system with the appropriate flow rate and pressure. Without it, the MID is simply a pump unit without a drive.

If you require a unit powered by a 230 V or 400 V mains supply, LIVERANI has other ranges available for this purpose — see the list below.

Three MID sizes

The weight is specified for a pump with a hydraulic motor. The model size is determined by the required flow rate and the available hydraulic flow. The speed range specified in the manufacturer’s data sheet is from 150 to 900 rpm, depending on the model size.

How a flexible impeller works

The impeller is made of elastomer and has flexible blades. As the impeller rotates, the blades deform against the casing wall. Enclosed volumes are formed between them, which draw in the fluid at the inlet and carry it to the outlet.

This results in three characteristics. The first is self-priming up to 6 m without the need for priming. The second is volumetric flow: the flow rate is proportional to the speed. The third is gentle pumping: the product does not pass through a high-shear zone, so its structure remains intact and it is not aerated.

The pump is reversible and operates in both directions of rotation. For a hydraulic drive, this simply involves changing the direction of flow in the hydraulic line. It can be installed in any position.

This limitation is due to the elastomer. Prolonged dry running is not permitted: the blades come into contact with the casing wall and are damaged by friction in the absence of fluid.

Impeller material: NR, CR, NBR, EPDM or VMQ

The choice of elastomer is determined by the operating environment, not by the flow rate.

The housing is made from AISI 304 or AISI 316 stainless steel. Grade 316 is used for corrosive environments. The shaft seal is a mechanical face seal. The compatibility of the elastomer with the specific product is checked prior to ordering.

Where is the LIVERANI MID pump used?

LIVERANI targets its range of impeller pumps at the wine-making, food processing, pharmaceutical and marine sectors.

The hydraulic drive limits the application of the MID to mobile and off-site tasks. These include the transfer of wine or grape must from a transport tanker, operating from a trailer during the harvest, pumping from tanks at sites without electricity, transferring from road tankers, and marine applications where hydraulics are already on board.

For a fixed installation with a connected power supply, the LIVERANI electric series is the more logical choice. The industrial pumps supplied by Steiner Ukraine are listed in the section industrial pumps, equipment for food production — in in a separate section.

All nine LIVERANI series by drive type

The LIVERANI range of impeller pumps comprises nine series. The hydraulic components are identical across the range; the difference lies in the drive system.

Choosing a series means selecting a drive suited to the site conditions. If there is no electricity or the pump is mounted on a machine, choose the MID series. If there is mains power and flow regulation is required — MINIVERTER, INV BS or VA/INV. If you need to monitor the volume pumped — ALL IN ONE with a flow meter. If you have your own motor — SP. All the manufacturer’s products are available at the LIVERANI page.

How to choose a LIVERANI MID pump at Steiner Ukraine

Seven pieces of information are required for selection: the required flow rate in litres per hour, the head or pipework resistance in metres, the product name, its viscosity and temperature, the type and size of the connection, and the steel grade of the casing.

Separately, and most importantly, the hydraulic system parameters: available flow rate in litres per minute and operating pressure. These determine which hydraulic motor will be fitted to the pump and what speed it will operate at. Without this information, it is impossible to determine the correct model and size.

Steiner Ukraine supplies LIVERANI equipment together with design calculations, complete sets and spare parts, including impellers made from various elastomers. The scope is described in the section services. Sector-specific recruitment — in sector-specific solutions. The technical specifications of the original source are published at the LIVERANI website.

Frequently Asked Questions

What type of drive does the LIVERANI MID pump have?
Hydraulic orbital motor. This series does not have its own electric motor. Rotation is provided by the machine’s hydraulic system or a separate hydraulic power unit.

How many sizes are there in the MID range?
Three: the MINOR 40, weighing 11.7 kg; the MAJOR 60, weighing 16 kg; and the MAXI 80, weighing 22 kg.

Is it possible to fit an electric motor to a MID?
The pump mounting is designed for a hydraulic motor: shaft Ø25 mm, flange Ø82.5, eight M12 studs. LIVERANI offers separate series for electric drives: SP, EP, RID, GR, VA/INV, INV BS, MINIVERTER and ALL IN ONE.

Is the pump self-priming?
Yes. The manufacturer states a self-priming capacity of up to 6 m for this range of impeller pumps.

Can the pump be run in reverse?
Yes. LIVERANI impeller pumps are reversible. In the case of a hydraulic drive, this involves changing the direction of flow in the hydraulic line.

What are the maximum viscosity and temperature?
Up to 50,000 cP and up to +100 °C. These figures apply to the LIVERANI range of impeller pumps.

What is the maximum pressure drop?
4 bar for the family of impeller pumps.

Is it safe to run the pump dry?
Prolonged dry running is not permitted. The flexible blades come into contact with the casing wall and are damaged by friction when there is no liquid present.

What connection options are available?
DIN 11851, Garolla, BSP, Macon, Triclover, SMS and BSM/RJT.

How much does a LIVERANI MID pump cost?
The price depends on the model, the grade of steel used for the housing, the material of the impeller, the connection type and whether it is fitted with a hydraulic motor. Please send us the flow rate, product details and specifications of your hydraulic system — we will prepare a quote.