S4 Pro

The S4 Pro delivers unmatched control in the smallest package available. With a 12.2 mm port circle and weight under 300g, it enables precision control where every millimetre matters.
Trusted in robotics, motorsport and compact industrial systems, the S4 Pro brings proven Domin reliability and performance into space-constrained environments.
Available on S01 port pattern as standard.
S4 Pro Web

Key Stats

The world’s smallest direct drive valve, delivering unmatched precision in robotics and compact systems with proven reliability.

Hysteresis

< 1 %

Leakage

< 0.45 l/min

Mass

290 g

Frequency Response

>200 Hz

Rated Flow

0.5-18 l/min

Response Time

< 3 ms

S4 Pro Common Applications

A Detailed Look

Upgrades

Star 300
%
Lower Leakage
Bosch 4WRPEH6
0 %
Faster Step Response
Woodward 27A
0 %
Lighter
The hydraulic valves supplied by Domin have been instrumental in enhancing the speed and reliability of the hydraulic system in our race yacht, Britannia. The cyclists are certainly starting to see the rewards of the energy efficiency of the valves.
System Concept Engineer,
INEOS Britannia
High-Performance Sports
The hydraulic valves supplied by Domin have been instrumental in enhancing the speed and reliability of the hydraulic system in our race yacht, Britannia. The cyclists are certainly starting to see the rewards of the energy efficiency of the valves.
System Concept Engineer,
INEOS Britannia
Domin is an outstanding organisation to work with and the advancements they’re making with once “traditional” hydraulic servo products is a game-changer for the industry. Domin Valves are highly responsive, true to spec, easily tuned, repeatable, reliable and extremely robust.
Technical Specialist
Motion Industries
Animatronics
Domin is an outstanding organisation to work with and the advancements they’re making with once “traditional” hydraulic servo products is a game-changer for the industry. Domin Valves are highly responsive, true to spec, easily tuned, repeatable, reliable and extremely robust.
Technical Specialist
Motion Industries

Upgrades

Star 300
0 %
Lower Leakage
Bosch 4WRPEH6
0 %
Faster Step Response
Woodward 27A
0 %
Lighter

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