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Introducing The Yuken A3HG Pump

Yuken A3HG Pump Animation

Yuken A3HG Pump Animation

The new Yuken A3HG series variable piston pumps is a result of the enhanced development based on the exceptional performance characteristics, reliability and innate quality of our current existing A3H series pumps.

The Yuken A3HG series, now has an improved nominal pressure of 31.5 MPa (315 bar) from 28MPa (280 bar) and a maximum pressure of 35 MPa (350 bar) that is maintaining the high performance of the A3H series. We have widened the range and now have available pumps not only with JIS mounting but also ISO and SAE variants as standard depending on market needs.

With a wide flow range, varying from 16 cm3 /rev to 180 cm3 /rev, optional through drive – allowing, if required, both pumps to be the same size, we can offer a wide displacement with various control possibilities.

The Benefits Of The Yuken ELDFG Series


Previous models of the proportional valve highlighted reoccurring problems such as:

  • Costly: Valves are costly and difficult to service up the tower. The electronic lifespan needed to be improved.
  • Rotational Movement: Rotational (washer) movement inherently causes high levels of vibration causing the product lifespan to decrease.
  • Performance: Valves must perform when needed to maximise wind efficiency and prevent over-speed of the turbine to prevent further damages.

The Solution

Introducing the Yuken ELDFG Series – Proportional Valve with ruggedised OBE design & seamless integration.

The Benefits:

  • The ELDFG Valve is seamlessly integrated.
  • Equal or better performance than competitors.
  • Spool Cut/ Flow Rate.
  • Dither Rate.
  • More Robust Electronic Card & Housing Design.
  • Improved Driver Card Mounting.
  • Improved Driver Card Design Over Competitors.


Yuken releases Machine Tool Catalogue!

This year at Hannover Messe, Yuken released a new catalogue focusing on one of our key target areas, Machine Tools. We have made a number of innovations, which you can find in the catalogue below, which includes:

  • Up to a 70% reduction in Power Consumption on our DSG 01 (CETOP 3) Directional Valves!
  • The new ARL1 which has been developed with energy saving technology, and is 50% smaller than our AR pump series!
  • An updated DSG-005/007 Directional Control Valve which is now 60% smaller than our DSG-01 Valves


Click here, Hydraulic Equipment for Machine Tools, to download the new Catalogue!

New Product Guide!

We’re proud to release our ‘New Product Guide’ which documents a number of new and innovative products, as well as updates to our current product range. Some of these innovations include:

  • Our A3HG piston pump now conforms to international ISO and SAE mounting dimensions
  • A range of new explosion proof (flame proof) Directional Control CETOP 3 and CETOP 5 Valves
  • A new two stage, high response (450Hz), Linear Servo Valve with a flow rate up to 3800l/min
  • A range of Multi Station Solenoid Operated Directional Control Valves
  • A whole new range of Energy Saving, Standard Power Units

Click here, Yuken New Product Guide, to view the full catalogue



Choosing The Right Hydraulic Fluid

hydraulic fluid

Choosing the right hydraulic fluid


For every hydraulic system, there are a huge variety of options available when it comes to your choice of hydraulic fluid. It is important to not that, while many fluids will accompany the system just fine, they may not be optimum for the purpose. With hydraulics, the two most important aspects for consideration are the viscosity grade and the hydraulic oil type of the hydraulic fluid.


Hydraulic fluid has a lot of different roles within the hydraulic system – it acts as both a heat and power transfer medium, as well as lubrication for the different components. Hydraulic fluids can either come in synthetic forms to withstand wider ranges of temperature, or water-based fluids for use when there is a potential risk of fire. The synthetic versions of hydraulic fluids are perfect for systems that experience higher pressures, temperatures and generally more extreme conditions. The water-based fluids are generally less expensive that synthetic hydraulic fluids, however, they are more expensive than petroleum – they offer very good protection against any fire hazards, however, this means that their other modes of protection are slightly weaker than that of the synthetic fluids.


Does having the right fluid matter?

Choosing a hydraulic fluid that offers the optimum rate of performance also depends on the type of pump which powers the system. There are three different types; vane, piston and gear. If your system features vane pumps, then maintaining a steady flow will require a viscosity range of 15 to 160 cSt. For piston pumps, the range is similar but slightly higher – 15 to 160 cSt. Piston pumps are also perfect for systems which operate at a higher pressure – they can produce pressures of up to 6000 psi. Gear pumps can be divided into internal and external gear pumps, the former of which can function with up to 2200 cSt. External gear pumps can operate a system with a hydraulic fluid of up to 300cSt. Despite the external gear pumps lower viscosity capabilities, they can produce pressures of between 3000 and 3500 psi – second only to the piston pumps for higher pressure systems.


Choosing the right hydraulic fluid depends on a few different factors – the viscosity of said fluid and the conditions of the system being the two most important. It is vital to keep in mind that, even though a system may run just fine with a particular hydraulic fluid, it may not be the optimum fluid for your system – it’s always worth a check.

The differences between piston pumps and vane pumps

piston pumps and vane pumps


The differences between piston pumps and vane pumps

A hydraulic pump is the most important component of your hydraulic system – it is the driving force and power of the hydraulic fluid, allowing the system to work as it is meant to. They are capable of pushing huge amounts of oil through hydraulic cylinders and motors, which is useful for all sorts of functions, like lifting and lowering heavy objects or opening or closing components. Considering this, it is important that you know about the different types of pumps and to what functions they are best suited – two examples of the hydraulic pump are piston pumps and vane pumps.


Both piston pumps and vane pumps operate in the same way, by displacement. They both include sealed chambers within their mechanism which allows the fluid to be transported from inlet to outlet. These chambers act as a barrier to ensure that there are no connections between the inlet and the outlet and allow the pumps to function at high pressures.


Piston pumps

In general, piston pumps handle large volumes at very high pressures. There are a number of different functions for which these are useful, including construction, marine, offshore and industrial. These pumps have the highest pressure rating and the best overall efficiency and reliability while maintaining it’s call size. The pumps get their name from the pistons within, which slide back and forth to pump fluid through the outlet – these also act as great sealants, which prevents any leakages that would usually come hand in hand with such high pressures. Axial piston pumps feature a bent axis design that effectively acts as a motor and pump in one, and the displacement volume can be adjusted by changing the swivel angle. These piston pumps are hugely adaptable. Radial piston pumps are used in areas of high pressure and are the only choice of pump capable of working in high-pressure examples like presses.


Vane pumps

Vane pumps are perfect if you are looking for your system to be as low-volume as possible while still maintaining a good efficiency. Vane pumps with low flow pulsation which allows for less noise production – because of this, these pumps are best suited to systems of constant flow and pressure. They are used in industry and land and road construction, as the low noise level prevents the problem of a noisy workplace or disturbing locals. Despite their low noise levels, they are still able to operate at high speeds of up to 3000 rpm, which makes them a great choice for cost and flow systems.


Get in contact with us or you can take a look at our pumps here.