Specifications & Datasheet

  • Onboard electronics with spool position feedback
  • Rated flow of up to 18 lpm (at 70 Bar ΔP)
  • Maximum flow of up to 38 lpm
  • Bandwidth of > 300 Hz (-3 dB, up to ± 25% FS)
  • Chipshear capability of > 40 N
  • Low power consumption of < 2 W at rated flow
  • Valve mass 290 g

S4 Pro Hydraulic Servo Valves

Potential Applications

  • Aerospace
  • Automotive
  • Motorsport
  • Robotics


The Domin S4 Pro Direct Drive Servo Valve (DDV) represents a revolution in servo valve performance. Up to now the customer has been left with an uncomfortable choice between the large footprint and weight of a DDV and the pressure and reliability limitations of EHSVs. The compromise is particularly acute with low flow applications.

The S4 Pro is based around the miniature 12.2 mm port circle and weighs less than 300g with spool feedback for a rated 18 lpm. It delivers all the performance you would expect from a high performance EHSV but is able to deliver it without the parasitic flow and pressure demands of a two-stage servo valve. The S4 Pro is suited to sub actuator control systems where spool positioning needs to be achieved without supply pressure.

S4 Pro Flow 9-18 Lap 0-5 +/-20mA E Y Red Oil Centre Viton

Weight 290 g
Rated Flow 9-18 lpm
Power Off Position Centre
Connector EN 175201-804 6 + PE
Input Signal +/-20mA
Lap Condition 0-5 %
Seal Material Viton
Fluid Type Red Oil
Enable Mode Yes


Volume Discounts Available

1 - 9 Units100%
10 - 99 Units90% (-10%)
100+ UnitsPlease enquire


£1,679.00 ex VAT
Delivery: 10-14 weeks

Payment & Security

Your payment is procesed securely. We do not store card details or have access to your payment information. If you would like to apply for an account and are a new client, please setup an account and request this payment option or fill out the form below.

Worldwide Shipping

Domin ships all products around the world from our factory in Europe or from our Head Office in the UK. Following stringent product testing, all products are wrapped as carefully as possible and dispatched with insured guaranteed delivery by the most reliable method possible. The courier or delivery company will vary from region to region.

For most valve orders, the production turnaround is 3 weeks from order to being ready for dispatch. For more complex or unique products it can take longer. So, if your timing is more urgent, or your need a very specific solution, please contact us first before ordering.

In any event, once we have received your order, we will be in touch with you within 48 working hours. We will confirm and agree with delivery timing, and if there are additional costs, so you retain full confidence in trusting Domin with your order.

Valve Emission Savings

1.1 Tonnes CO2

Per Valve Per Year

*  Based on a S6 Pro Valve which will save 17 tonnes of Carbon Dioxide over 15 years.

Find out More

If you want to discuss your options

If you have a really specific requirement, or have any questions about Domin and our product range,
please call the team on 01761 252 650, or fill out the form below.

By submitting this form you are agreeing for us to contact you relating to your interest in hydraulic power systems.

Every Hydraulics product we ship
is fully tested for:

Supplied with
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