Advantages of Digital Displacement® Technology

This page describes some of the benefits Digital Displacement® has over traditional hydraulic power technology.

Hyperlinked entries in the list have dedicated pages describing them further.

Digital Displacement® (DD) uses high speed poppet valves controlled by power electronics. DD machines have a bandwidth of around 20Hz and can produce full output flow in around 25ms.

Unbeatable Controllability

DD machines have a modular construction that allows a multiplicity of independent services to be supplied by a single compact machine without recourse to either flow divider valves or priority systems.

Unparalleled Efficiency

DD machines are well over 90% efficient, even at part load and high pressures. There are outstanding efficiency gains at the system level too due to its completely independent outputs and ability to efficiently reclaim energy from high pressure services and route it to other services.

DD technology is surprisingly low cost, due to its modular construction and relaxed component tolerances compared to other variable flow machines. System costs are also typically much lower than possible using conventional hydraulics - for more information see the Efficiency page.

DD machines inherit the extreme ruggedness of other poppet machines and the ability to operate on low lubricity fluids such as biodegradable emulsions, water and fuel

A very high power density, three to ten times higher than electrical machines.

A potential power range from 1 kilowatt to over 10 megawatts.

Reliable load holding due to seating valves. There is absolutely no leakage at zero flow.

Water pump

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