Servo valves

Industrial hydraulic valves

Servo valves

Precise and reliable, Eaton Vickers servo valves provide closed-loop control with exact positional accuracy, repeatable velocity profiles, and predictable force or torque regulation, outperforming the competition in even the most demanding applications. Contact us to learn about our servo trade-up programme, with incentives for replacing competitors’ valves.

FREQUENCY RESPONSE

Over 100 Hz at the 90-degree phase lag

PRESSURE

Up to 350 bar (5,000 psi)

FLOW

Up to 151 L/min (40 gal/min)

The ultimate in system control

Subplate or manifold mounted, Eaton Vickers SM4 and SX4 servo valves have a symmetrical design that provides inherently dependable metering of control flow with minimum null shifts for more consistent machine operation. These two-stage modular flow control valves provide infinite cylinder position control to within 0.025 mm (0.001 in) or better, as well as infinite proportional flow control for real-time velocity/acceleration profiles when applied with servo hydraulic motors, tachometers and electronics.

Made to last

The spool and sleeve are hardened stainless steel to minimise wear and erosion. High-strength aluminium alloy parts are extremely durable yet lightweight. An integral 35-micron absolute filter reduces sensitivity to contamination.

Cost effective

The flexibility of a standardised port circle and mounting pattern, with available adapter manifolds, make SM4 and SX4 servo valves an affordable way to enhance hydraulic systems.

Do you need an SX4 or SM4 servo valve?

Our SM4 line features more variation to help you find the perfect fit for your application. The SX4 is our highest performance servo valve, which offers the following advantages:

Extended frequency response and improved stability in closed-loop systems
Greater stability in high-shock environments due to the six-screw mounting
The jewelled feedback ball receiver virtually eliminates the wear that can lead to loss of control
Jewelled openings extend valve life

Applications

Tilting trains
Presses
Primary metals
Plastic injection moulding, blow moulding

Pulp and paper
Test equipment and simulation
Turbine control (steam)
Wood processing

Trade up to Eaton and save

Need a new servo valve? Trade up to Eaton. Send us a qualifying competitor's servo valve to receive a 25% discount on your order. In addition, order a back-up valve and save 15% when ordering with any of the trade-up incentives. Download the brochure to learn more about the Eaton servo valve trade-up programme.

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Don’t forget the subplates and bolt kits

To install Eaton industrial valves, you need Eaton subplates and bolt kits. This hardware is engineered especially for Eaton valves and manifolds to give your systems the flat surfaces and stiffness required for a reliable seal.

Let's work together

Whether you’re designing a new system or retrofitting an existing machine, Eaton’s design and engineering experts and integrator partners are available for consultation and collaboration. We offer system design, analysis, build and project management services.

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Eaton’s mission is to improve the quality of life and the environment through the use of power management technologies and services. We provide sustainable solutions that help our customers effectively manage electrical, hydraulic, and mechanical power – more safely, more efficiently, and more reliably. Eaton’s 2020 revenues were $17.9 billion, and we sell products to customers in more than 175 countries.

Servo valves

The ultimate in system control

Made to last

Cost effective

Do you need an SX4 or SM4 servo valve?

Trade up to Eaton and save

Don’t forget the subplates and bolt kits

Let's work together

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