QP40A Hydraulic
Power Unit

Complete Comfort and Roll Control Solutions

Quantum Marine Stabilizers


The QP40A is a compact hydraulic power unit (HPU) complete with one submersible 30kW /40hp electric motor, close coupled to a variable displacement pump and vertically mounted in the oil reservoir. Also available in 45kW / 60hp and 75kW / 100hp.



The QP40A is a single function, self-contained hydraulic power unit, specifically designed for the operation of stabilizing systems equipped for Zero Speed™ applications. Quantum has tailored this HPU for either single or dual pressure configurations. This HPU has multiple pump options, as the quietest pump is selected for individualized applications. The submersible design boasts a 50% noise reduction over a conventional unit. Cooling is via two dual pass, dedicated salt water heat exchangers, mounted in the oil reservoir.  Ideal for areas with low overhead clearance. Also available with a output of 45kW / 60hp and 75kW / 100hp.


Key advantages of the
QP40A Hydraulic Power Unit


Simple Installation

The QP40A is designed to incorporate maximum hydraulic function within a single “plug and play” assembly. Thus, straight-forward connections for mechanical installation, as well as hydraulic and cooling pipe work are at the heart of the QP40A design.


The power unit only draws the minimum power necessary to operate the hydraulic components on demand, thus reducing the load on the vessel’s electrical power and cooling systems.

Minimal Noise

To minimize structural borne noise, the power unit is fitted with two independent mounting systems for reciprocating components and to minimize hydraulic ripple in the discharge oil. The QP40A is 50% quieter than a conventional unit.


The durable high gloss paint finish rivals the finish presented in public spaces of even the highest quality yachts. Details such as polished stainless steel tubing and black anodized manifolds make this unit a work of art as well as a practical marine grade solution.


Rollover buttons for details
  • Large cover designed for easy access to all internal components
  • Pressure manifold-customizable parameters
  • Submersed - ultra quiet pump & motor
  • High efficiency in-tank cooler

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