Hydraulic power units


A hydraulic power unit is a group of different components that generate mechanical energy converted into pressurisation of the oil in a hydraulic circuit. Their main function is to apply the hydraulic pressure required to control the motion of cylinders, hydraulic motors or other parts of a specific system.

Duplomatic produces power units for a variety of pressure ranges and flow rates, capacities, materials and types of fluid compatibility. Hydraulic power units are designed with modern 3D systems with multiple interfaces and FEM simulation systems and are produced entirely in Italy at our dedicated facility in Lainate.

Duplomatic offers all of the necessary expertise (fluid dynamics, functional, electrical and build-related) to create the most appropriate solution for the requested application, establishing ongoing dialogue with our customers’ technical departments.


  • DNV, ABS, BV, RINA, Atex 2014/34/EU, Inmetro, IECEx, PED 2014/68/EU, SIL, UL-CSA, AUSTRALIAN MEPS (for electric motors), ASMEIX & ISO 9606-1:2017 for welding processes, 2006/42/EC Machinery safety.


Control processes:

  • WPS, PQR, NDT, PM.


Share | Contact us

Technical features

  • Tank dimensions:
    • Standard as per hydraulic power unit catalogue *from 8 to 150 dm³
    • Custom from 50 to 25,000 dm³
  • Pumps:
    • Fixed or variable cylinder
    • External gear – internal gear – helical gear – screw – vane – piston
    • Displacement from 1.3 cm³ a 600 cm³
    • Operating pressure up to 500 bar
  • Motor types:
    • Asynchronous – Direct Current – BRUSHLESS
    • Single-phase and three-phase voltages 220 – 400 – 440 – 690
    • Power from 25Kw to 500Kw
    • Asynchronous and brushless motors
  • Cooling systems:
    • air – oil
    • water – oil
    • types of heat exchanger: air – brazed plate – plate
  • Materials:
    • Carbon Steel
    • Stainless Steel 304-316L
  • Piping and connections:
    • Carbon Steel
    • Stainless Steel 304-316L
    • 6Mo
    • Swagelock (Installator certified)

Do you want to know more?

visit our Hydraulic Systems Business Unit

Find out more