Internal Gear Pumps

V volumetric internal gear pumps are used in applications where the management of clean fluids with high viscosities is required. They are used in all industrial applications where a delicate treatment of the pumped product is necessary, preventing chemical-physical alterations. Being volumetric rotary pumps, they ensure flow rates proportional to the rotational speed and provide constant, pulse-free flows, regardless of the back pressure.

Internal gear pumps are a type of positive displacement pump that are highly effective for handling high viscosity fluids. As a rotary positive displacement pump, they operate by trapping a fixed amount of fluid and moving it through the pump's internal gears. This design makes them particularly suitable for applications involving abrasive liquids, as the internal gear mechanism can handle such fluids with minimal wear and tear.

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Technical data

FLOW

Up to 240 m3/h

Connections

Up to 200 mm

Standard construction materials

Cast iron, treated cast iron, carbon steel, stainless steel

Viscosity

20 - 100.000 [mm2/s - cSt]

Pression

Up to 16 bar

Temperature

Up to 200°C

Advantages

  1. Constant Flow Rate: The flow rate is proportional to the number of revolutions, regardless of back pressure.
  2. Continuous Flow: Provides a pulse-free flow with no pressure peaks, eliminating system vibrations.
  3. Versatility: The rotor axis adjustment device allows the same pump to handle liquids with viscosities ranging from below that of water to high viscosity liquids.
  4. Reversibility: Changing the direction of rotation reverses the flow direction of the liquid, while maintaining consistent features and performance.
  5. Self-Priming: Achieves a high degree of vacuum, enabling fast self-priming at the maximum heights permitted by the physical properties of the pumped liquid.
Brochure Varisco V and SAXMAG V Series EN

Brochure Varisco V and SAXMAG V Series EN

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Filename
2959 0000 01_EN_Varisco Brochure Serie V - Saxmag V_LR_25-01.pdf
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3 MB
Format
pdf
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Varisco Manual V IT-EN-FR-DE-ES-NL-PT-PL 401 Rev11-2025

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Varisco Manual V-ATEX 2022 Rev04 IT-EN-FR-DE-ES-NL-PL

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Service Video Tutorial - V Series

Varisco V Pumps - Disassembly and Assembly By-Pass Valve
Varisco V Pumps - Mechanical Seal
Varisco V Pumps - Pin and Shaft Replacement
Varisco V Pumps - Bushes Replacement
Varisco V Pumps - Packing Gland Replacement
Varisco V Pump - Dismantling
Varisco V Pumps - Inverse suction - Discharge ports and rotation of the casing
Varisco V Pump - Assembly
Varisco V Pumps ATEX Certification

Varisco V Pumps ATEX Certification

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Filename
Varisco V ATEX.pdf
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220 KB
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pdf
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Varisco V Pumps Certification ICIM-MOC-009849-01

Varisco V Pumps Certification ICIM-MOC-009849-01

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Filename
Varisco MOCA 2025.pdf
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276 KB
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pdf
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Pump Configuration

Varisco offers the V Series internal gear pumps in various sizes and metallurgical configurations. Available as bare shaft pumps or as complete units with an electric motor, the V Series presents a large range of options. Designed for versatility, it adapts to diverse fluid management applications, including those involving high viscosity and abrasive liquids.

V

Bare shaft pump

This pump type features a compact, bare shaft design, making it adaptable to different motor and drive configurations for various industrial applications.

positive displacement internal gear pumps

V BASE

Base and joint pump

A base and joint internal gear pump is a robust and efficient pumping solution mounted on a sturdy base frame arrange with coupling.

v internal gear pump series

VERTICAL V

Vertical pump

A vertical internal gear pump is ideal for installations where space is limited. It can be easily moved around thanks to lifting lugs on the top, ensuring convenient mobility.

v internal gear pumps vertical installation

V SERIES

The operating principle of internal gear pump

V pumps are internal gear positive displacement rotary pumps. The flow is generated by two gears: the rotor and idler, one inside the other, separated by a crescent. As the gears rotate, liquid is drawn into the spaces created between the gears and the crescent. When the gears mesh, the liquid is forced out of the pump. The result is a smooth flow of liquid and high capacity combined with compact size.

v-series variso
Viscous fluids

Applications

To ensure correct pump operation, it is crucial to pick the right product with respect to the application and the chemical-physical characteristics of the fluid being treated.

Pump for adhesives
Adhesives

Glue, Epoxy resins

Pump for paints and inks
Paints and inks

Printing ink, Lacquers, Linings, Automotive paint, Additives

Industrial pumps
General Industries

Industries manufacturing painting machinery, Feed industry, Industries for the processing, Automotive industries, Steel plants, Tanneries, Paper factories, Mechanical processing industries, Protection of sites subject to floods, Oil mills

Pumps for petroleum products
Petroleum Products

Diesel, Fuel oil, Lubricating oil, Additives and crude oil

Pump for detergent
Soaps and cleaning products

Surfactants, Liquid cleaning products, Products for personal hygiene

Pump for glucose
Chemicals

Solvents, Acids, Alkalis, Polyols, Filled polyols, Isocyanates, Rubbers, Latex and polyester resins

Pump for glucose
Glucose

Glucose, also known as dextrose, is a simple carbohydrate often used as a quick energy source in the food industry and medicine. 

Pumps for resins
Resins

Resins are synthetic materials used in a wide range of applications, from the production of construction materials to paints, from adhesives and packaging products to rubbers.

Pumps for recicling
Bitumen

The Varisco positive displacement internal gear pumps for bitumen application is the perfect choice for moving most bitumen compounds.

Pumps for agricolture
Pet Food and Agricolture

Varisco pumps are used in ancillary applications for waters containing agricultural manure for the livestock, farming, dairy and agricultural sectors.

Chocolate pumps
Chocolate

The robust construction and easy maintenance of Varisco internal gear V pumps compliant with EC Regulation 1935/2004 make the series a reliable choice for chocolate processing industries. 

Continue reading

2023-08-31

Success story

Varisco pumps for ketone resins

A leading company active in the production of ketone resins has implemented Varisco internal gear and self-priming centrifugal pumps to transfer the chemical components used in the process.
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Resins pump application

2023-05-31

Success story

Glucose transfer pumps

Due to their heavy-duty design for viscous and very viscous fluids, V-series internal gear pumps are particularly suitable for glucose handling.
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Glucose production application

2022-05-31

Success story

Varisco pumps for chemicals

Varisco pumps have been installed for their ability to manage clean fluids with high viscosity and to maintain the chemical-physical properties of the pumped product unaltered.
read more
Varisco Sewage Pumps