Hydraproducts Blog

Get in touch today to discuss your requirements

Call: (+44) 01452 523352

Hydraproducts Blog


All the latest news and information from Hydraproducts.

What Power Pack is right for me? ben lee

Which Power Pack is right for me?

Hydraulic power units are used for a broad range of applications from operating control valves in the outback of Australia to raising parking barriers in Siberia. To match this range of applications there are an equally large range of hydraulic systems and products.

Whether you are designing, specifying, manufacturing or purchasing a hydraulic power pack there are several pointers that will narrow down this range.

Firstly an assessment of the power that will be required. This does often require the use of appropriate hydraulic and mechanical design tools. Some useful tools can be found here http://www.hydraproducts.co.uk/hydraulic-calculators.aspx. When the power (kW) level is known this leads to second stage of deciding upon what power source might be available.

Power sources are typically electrical, combustion engines or mechanical drive. Electrical sources will divide into AC and DC, this will depend greatly on the application and location. Where electrical sources are not possible, such as trailers, petrol, diesel or gas combustion engines can form the centre of a hydraulic power pack. Common for vehicle based hydraulic systems a DC, or battery will give the motive power source.

Each of the power sources will have their practical and economic limits.

Typically DC Power available on the majority of vehicles is a maximum of 3kW. A small commercial vehicle or van would be 12VDC and a maximum battery power of 2kW. Whereas a larger heavy goods vehicle could have a 4kW 24VDC system. Forklifts and other goods handling equipment will often be 48 or 72VDC.

AC electrical power can generally be spilt into two camps, 1 phase and 3 phase. For domestic/office applications 220-240V 1phase will be available up to a limit of 2.2kW. Site work will often be operated at 110V 1 phase and this will be limited to 1.5kW. 3 phase power covers a much larger range from 0.09kW to over 100kW, and this will be common in all industrial applications.

Combustion engines cover a wide range, with small single cylinder petrol engines starting at 4HP and diesel engines starting slightly higher than this at 6HP up to over 100HP.

This chart summarises the maximum power source ranges:-





















100kW +



This chart is based on products that can be built economically, and not what is physically possible.

The next question to ask yourself might be what is the operating duty of the powerpack will have to work within.  This is important when selecting which type of powerpack as for example it may not be possible to specific features such as tank size or motor type that will ensure they can run continuously.  If we simply divide these into S1 (running 100% of a day) and S2 (running for a short operating time).

This chart will allow some division of our product range based on operating duty:-



Comments are closed.


hpu hydraproducts Hydraulic Equipment hydraulic fluid hydraulic oil hydraulic power Hydraulic power packs hydraulic power units Hydraulic Pumps Hydraulic System Maintenance Hydraulic Systems Hydraulic Troubleshooting ATEX reference numbers cavitation Electrohydraulic electrohydraulics History of Hydraulics hydraproducts hydraulic Hydraulic Circuit Design hydraulic circuit diagram hydraulic components hydraulic cylinder hydraulic cylinders hydraulic design hydraulic equipment hydraulic filters Hydraulic Fluid hydraulic fluid contamination Hydraulic fluids hydraulic hose failure hydraulic hoses Hydraulic machinery hydraulic machines hydraulic maintenance hydraulic mechanism Hydraulic motors Hydraulic oil hydraulic oil viscosity hydraulic parts hydraulic piston pumps Hydraulic Power hydraulic power pack hydraulic power pack uses hydraulic power packs hydraulic power systems Hydraulic power unit hydraulic power units hydraulic powerpacks hydraulic pump hydraulic pumps hydraulic reservoir design Hydraulic Seals hydraulic system hydraulic system design hydraulic system failure hydraulic system maintenance hydraulic system problems hydraulic system repairs hydraulic system safety hydraulic systems hydraulic tools Hydraulic Valves hydraulics Industrial Hydraulic Power Units maintaining hydraulic systems micro hydraulic power packs micro power packs Mini hydraulic power packs oil contamination remotely operated vehicles subsea equipment subsea hydraulic power units subsea hydraulics system maintenance troubleshooting hydraulic systems