AS9120B, ISO 9001:2015, AND FAA AC 0056B ACCREDITED

Choosing the Appropriate Hydraulic Power Unit for Your Needs

When it comes to hydraulic systems, selecting the right hydraulic power unit (HPU) is crucial for the efficient operation of various equipment and machinery, especially in fields like ground support equipment and industrial applications. Whether you are working with hydraulic actuators, heavy machinery, or any other hydraulic-powered system, choosing the appropriate hydraulic power unit can significantly impact performance and reliability. In this blog, we will explore key factors to consider when selecting an HPU, ensuring that your choice aligns with your specific requirements.

Understanding the Basics

Before delving into the selection process, it is first essential to grasp the basics of hydraulic power units. HPUs are a cornerstone of hydraulic systems, responsible for generating the pressure needed to drive hydraulic actuators. They are often used in various industries, including construction, aerospace, agriculture, and more. Additionally, HPUs consist of a hydraulic pump, a reservoir for hydraulic fluid, a motor to drive the pump, and various control valves.

Defining Your Requirements

The first step in choosing the right hydraulic power unit is to clearly define your requirements. Start by assessing the demands of your hydraulic actuator or machinery. For example, what is the required flow rate and pressure? Moreover, it is vital to consider the duty cycle, which determines how frequently the system will be in operation. Furthermore, you should factor in environmental conditions, such as temperature and humidity, as they can affect the performance and longevity of your HPU.

Selecting the Right Pump Type

One of the most critical components of an HPU is the hydraulic pump. There are two common types: fixed displacement and variable displacement pumps. Fixed displacement pumps provide a consistent flow rate, making them suitable for applications with a steady workload. Variable displacement pumps, on the other hand, can adjust their flow rate, which is ideal for systems with varying demands. Therefore, your choice should align with the specific requirements of your hydraulic actuator and the system as a whole.

Fluid Selection

The hydraulic fluid used in your HPU plays a vital role in system performance. Different applications require varying types of hydraulic fluid, so it is essential to choose the right fluid to ensure the longevity of your HPU and hydraulic actuators. Notably, common hydraulic fluids include mineral oil, synthetic, and water-based options, the choice depending on factors like temperature, pressure, as well as compatibility with seals and components.

Consider Energy Efficiency

Energy efficiency is increasingly important in today's world, and choosing an energy-efficient HPU can reduce operating costs and minimize environmental impact. Look for HPUs that feature energy-efficient components and designs, such as variable-speed motors and advanced control systems that can adapt to varying loads. All in all, investing in an energy-efficient HPU can lead to significant savings over the long term.

Size and Mounting

The size and mounting of your HPU should also be considered. Depending on available space and your equipment's design, you may need a compact or custom-designed HPU. Additionally, consider how the HPU will be mounted–whether it is integral to your machinery or a standalone unit. Regardless, the mounting arrangement should ensure easy access for maintenance and service.

Reliability and Maintenance

Reliability is paramount when choosing an HPU, so ensuring that the manufacturer of the hydraulic power unit has a track record of producing durable and dependable systems is essential. Regular maintenance is also crucial, so make sure the unit is designed for easy access to key components, allowing for routine maintenance tasks, such as changing filters and inspecting hoses, to be performed efficiently.

Cost Considerations

While it is essential to select a high-quality HPU, budget constraints are a reality for most businesses. Consider both the upfront cost and the total cost of ownership over the life of the HPU. Sometimes, investing a bit more upfront in a reliable and energy-efficient unit can lead to substantial savings in the long run through reduced maintenance and operational costs.


Selecting the appropriate hydraulic power unit may take some time and research, but the benefits in terms of efficiency, performance, and longevity are well worth the effort. Whether you are working with ground support equipment, industrial machinery, or hydraulic actuators, your choice of HPU will significantly impact the success of your operations. So, take your time, consult with experts, and make a choice that sets you up for hydraulic success in the long run.

For all the hydraulic power unit parts and other similar items, you require for carrying out operations, look no further than Aviation 3Sixty. With our dedication to quality control and export compliance, we proudly conduct operations with AS9120B, ISO 9001:2015, and FAA AC 00-56B accreditation. We are also experts in tracking down parts with long lead times, finding solutions when other channels fail. Considering all that, see how we can present you with unrivaled solutions and competitive pricing when you get in touch with one of our specialists today.


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