There are many parameters to consider in choosing a hydraulic power unit. One of the most important to consider is the nominal force, which depends on the desired pressure and flow rate. The following three essential terms are defined as follows:

  • Nominal pressure. The nominal pressure refers to the maximum amount of force the unit can take, which is proportional to the engine’s capacity.
  • Nominal flow rate. Pertains to the volume of hydraulic fluid pumped into the system at any given time
  • Nominal power. This refers to the motor’s maximum capacity, which drives the function of the hydraulic pump.

In operating a fluid-driven system, it is crucial to calculate the unit’s force correctly. Excess energy and pressure are not always advantageous because it can damage the components of the system. On the other hand, if there is not enough energy produced, the system will not operate properly. In addition to these two factors, you also need to find the correct tank estimate so that it has sufficient capability to supply the system.

Hydraulic power pack use – intermittent or continuous

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If a hydraulic power pack is used beyond the specified operating rate, the system may overheat. The fluid within the system may also evaporate, resulting in engine damage.

Choosing the right hydraulic unit energy source

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Suppliers like www.hydraproducts.co.uk specify the type of motor that drives the pump. In most models sold by various suppliers today, a power pack is either fueled by an electric motor or a combustion engine.

  • Electric-powered hydraulic power pack. A unit fitted with electric motors are either AC-powered or DC-powered. DC motors are most suited for portable applications, such as hydraulics found in vehicles. On the other hand, AC-equipped motors that run on fluid pressure are usually found in stationary applications like factory machinery.
  • Combustion motor. In applications where there is no electricity source, these energy packs can be driven by a gas combustion engine. The options available in the market today are varied and cater to a wide range of applications.

If there is a pneumatic circuit, you can also consider an air-driven unit. This option is suitable for applications where there are dangerous particles in the atmosphere.

How to choose the right hydraulic power unit size

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There are three common categories of power units according to size:

  • Standard unit. In general, standard units can reach a maximum pressure of 4,500 bar. The largest among all types of portable energy packs, you can still achieve some mobility with a standard model provided that the machine chassis has wheels.
  • Micro hydraulic pack. Micro units are designed to be compact and portable. These devices are meant for small machines. What is most important here is not the capacity, but the convenience of portability.
  • Mini hydraulic pack. Next to the standard size is the mini-unit. It is also compact and portable but has a maximum pressure of up to 350 bar. These mini power devices are also suited for mobile installations such as in heavy construction machinery.

In addition to these considerations, cooling is also vital to prolonging the performance of the unit. Conversely, heating may also be necessary depending on the requirements of the installation.

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