Anatomy of a Hydraulic Power Unit

Hydraulic power units are engineered to maximize pumping efficiency and fluid pressure stability

Anatomy of a Hydraulic Power UnitHydraulic systems can be complex, and the more separate components you have the more potential leak points and compatibility issues you may face. Purchasing a hydraulic power unit rather than using a standard pumping system can help improve the performance of your hydraulic system. Because hydraulic power units from quality name brands like Parker are meticulously engineered to provide stable fluid energy using multi-stage pressurization networks, you can count on them to deliver the reliable fluid pressure you need for efficient system operation, provided of course you select the best power unit for the parameters of your system.

What Makes Hydraulic Power Units Special

Large, durable power units for rugged hydraulic equipment have many design characteristics that differentiate them from your typical pumping system. Some of the primary design elements of hydraulic power units include:

Accumulators: These containers store pressurized fluid from the pumping mechanism and help the hydraulic system to maintain the correct fluid pressure required to operate the cylinders and other downstream parts.

Motor Pumps: Hydraulic power units can be single-pump or multi-pump systems. In either case, the motor may be electric or diesel/gas.

Tanks: Built-in tanks to store fluid are included within the unit.

Filters: The filters included in power units are typically located along the top of the tank, sometimes within a self-contained bypass unit with its own motor and pump. The filter helps to trap contaminants and keep them from damaging your system. The benefit of a filter with a self-contained bypass unit is that it can often be replaced even while the unit is on.

Temperature Regulation Equipment: An air cooler is typically located near the filter unit to help prevent damage from exceeding maximum operating temperatures. For cold-weather equipment, an oil-based heater may be used to achieve the necessary minimum operating temperature.

Power Unit Controllers: These parts consist of an integrated interface containing power switches, displays, monitoring features, etc. and are vital for integrating your power unit into the rest of your hydraulic system.

Choosing the Right Hydraulic Power Units

Obviously, in order to reap the benefits of a hydraulic power unit you must make sure that its pressure limits, power capacity, pumping strength, reservoir volume, etc. are compatible with your equipment. Respected hydraulic parts manufacturers such as Parker offer plenty of self-contained power units including standard and compact models. If you can’t find exactly what you need, you can always request a custom power unit. If you need help selecting or installing your new hydraulic power unit, please don’t hesitate to contact Bernell Hydraulics.