The Domin S4 Pro


S4 Pro

The Domin S4 Pro series of servo proportional valves are lightweight, high-performance directional flow control valves that cover a range of rated flows from 0.5 l/min to 18 l/min up to a maximum pressure of 350 bar per spool land.

Based on a miniature port circle of 12.2 mm and with a weight of less than 300g, the S4 Pro is suited to applications requiring superior performance, dynamics and reliability expected of a proportional valve in an ultra-compact package.

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S4 Pro

Key stats for the S4 Pro




<0.45 l/min



Frequency Response


Rated Flow

0.5-18 l/min

Response Time

<3 ms

S4 Pro Common Applications

Automotive / Motorsports
Marine Logo


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