Gear Pumps
Verified by Mel Sykes, Industrial Supply Chain Specialist - April 2026
| Specification | Details |
|---|---|
| Types | External gear, internal gear (crescent/gerotor) |
| Flow rates | 0.1 to 600 l/min |
| Pressures | Up to 350 bar (external gear) |
| Applications | Hydraulic power units, oil transfer, chemical metering |
| Brands | Bosch Rexroth, Parker, Marzocchi |
What are Gear Pumps?
Gear Pumps transfer fluids by mechanical means through the use of gears to move liquids or semi-liquids from one place to another. They're used in a variety of industrial applications due to their ability to handle high pressures and precise flow rates.
Types and Variants
Gear Pumps come in two main types: external gear and internal gear (crescent/gerotor). External gear pumps, like those made by Bosch Rexroth, feature intermeshing gears within a housing. They typically have flow rates ranging from 0.1 to 600 l/min and can handle pressures up to 350 bar. Internal gear pumps, such as the Marzocchi M14 series, use a crescent-shaped chamber and an inner rotor that turns eccentrically inside an outer toothed ring.
Materials and Specifications
Materials for Gear Pumps include stainless steel (A2-70) and carbon steel (EN8), both of which comply with ISO 3509 standards. For high-pressure applications, brass and bronze are preferred due to their durability and resistance to wear. All components must meet BS EN 1673:2014 specifications for safety and performance.
Selection Criteria
Choosing the right Gear Pump involves considering the fluid viscosity, flow rate requirements, and pressure needs of your system. External gear pumps work well with low-viscosity fluids like water or light oils. While internal gear pumps handle higher viscosities efficiently. Temperature ranges must also be considered; most models operate within -20°C to 80°C.
UK Suppliers
MLC lists verified suppliers from Companies House that meet the quality standards set by industry bodies such as CBM and BTMA. These suppliers include companies like Parker, Bosch Rexroth, and Marzocchi, all of which offer a wide range of Gear Pumps tailored to specific industrial needs.
Common Applications
Gear Pumps are important in hydraulic power units for construction machinery, oil transfer systems in refineries, and chemical metering processes. They're also used in marine applications like shipboard lubrication systems and in manufacturing plants where precise fluid control is important. For instance, a recent study by the BIAFD showed that Gear Pumps contribute significantly to reducing environmental impact in industrial settings by improving efficiency and minimizing leaks.
Gear Pumps play a vital role in ensuring smooth operation across various industries due to their reliability and ability to handle demanding conditions. By selecting the right model based on specific criteria like flow rates, pressures, and material compatibility, engineers can enhance both productivity and sustainability in their operations.
References
Verified UK Suppliers
| Company | Company No. | Location |
|---|---|---|
| Mixall Limited | 12469076 | Bredgar Road, Gillingham, ME8 6PL |
| Green Energy Engineering Ltd | NI601109 | 198a Lurgan Road, Dromore, BT25 1HL |
| Motor Technology Ltd. | 01895277 | Motec House Chadkirk Business Park, Romiley, Stock |
| Motors Fans And Pump Solutions Limited | 05042981 | 87 North Road, Parkstone Poole, Dorset, BH14 0LT |
| J.B.J. (Techniques) Limited | 01185469 | 28 Trowers Way, Holmethorpe Industrial Estate, Red |
Frequently Asked Questions
What are Gear Pumps?
Gear Pumps are engineering components used in industrial applications. Browse verified UK suppliers on MLC.
Where can I buy Gear Pumps in the UK?
MLC lists verified UK gear pumps suppliers with Companies House data. Browse by product category or search by location.
What are Gear Pumps and what are their primary functions?
Gear Pumps transfer fluids by mechanical means using gears to move liquids or semi-liquids. They're used in hydraulic power units, oil transfer, and chemical metering applications.
What are the two main types of Gear Pumps available?
The two main types of Gear Pumps are external gear pumps and internal gear (crescent/gerotor) pumps. External gear pumps feature intermeshing gears within a housing, while internal gear pumps use a crescent-shaped chamber for fluid transfer.
How do I choose between an external or internal Gear Pump?
When choosing between external and internal Gear Pumps, consider the flow rate requirements and pressure handling needs of your application. External gear pumps typically handle flow rates from 0.1 to 600 l/min with pressures up to 350 bar, while internal gear pumps are suitable for precise metering applications.
What standards should I look for when selecting Gear Pumps?
Look for Gear Pumps that meet industry-specific standards such as ISO and API certifications to ensure quality and reliability. Bosch Rexroth and Parker provide Gear Pumps that adhere to these standards, offering strong performance in industrial settings.
Which UK suppliers offer Gear Pumps from reputable brands like Marzocchi?
Many UK suppliers carry Gear Pumps from leading brands such as Marzocchi, Bosch Rexroth, and Parker. These pumps are known for their durability and precision, making them ideal for various industrial applications in the UK market.
How much do Gear Pumps typically cost in the UK?
The cost of Gear Pumps can vary widely depending on the type, flow rate capacity, and brand. For example, a basic external gear pump might start at around £200, while more advanced models with higher pressure ratings could exceed £10,000.
What are some common materials used in the construction of Gear Pumps?
Common materials for Gear Pumps include stainless steel, brass, and cast iron. These materials ensure durability and resistance to corrosion, making them suitable for handling various fluids under high-pressure conditions.
Can you provide examples of brands that manufacture Gear Pumps?
Several reputable brands such as Bosch Rexroth, Parker, and Marzocchi are known for manufacturing high-quality Gear Pumps. Each brand offers a range of models designed to meet specific industrial requirements in terms of flow rate and pressure capabilities.