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SAE ARP490

(R) Electrohydraulic Servovalves

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Organization: SAE
Publication Date: 1 April 2020
Status: active
Page Count: 78
scope:

This SAE Aerospace Recommended Practice (ARP) provides definitions and background information regarding the physical performance and testing of electrohydraulic flow control and pressure control servovalves. This ARP also provides extensive guidance for the preparation of procurement specifications and for functional testing.

NOTE: An example of a procurement specification is provided as Appendix A.

Field of Application

This ARP is applicable to electrohydraulic servovalves that are used in fluid power systems in all types of commercial and military flight vehicles.

Although the primary focus of this ARP is on four-way servovalves, three-way servovalves are discussed to a limited extent.

Limitations

The requirements that are contained in ARP490 are confined to the interface definition and the input/output characteristics of electrohydraulic servovalves.

This ARP does not restrict or attempt to define the internal characteristics of servovalves. As such, the recommendations are equally applicable to valves having different internal functioning, different ratings, different physical size, and valves used with different fluids. In certain instances, standards for valve design are recommended for the purpose of interchangeability; for example, as valve polarity, mounting bolt, and fluid port locations.

intended Use:

The servovalve will be used to control the actuators in the flight control subsystem of an aerodynamic surface.

Document History

SAE ARP490
April 1, 2020
(R) Electrohydraulic Servovalves
This SAE Aerospace Recommended Practice (ARP) provides definitions and background information regarding the physical performance and testing of electrohydraulic flow control and pressure control...
February 1, 2008
(R) Electrohydraulic Servovalves
This SAE Aerospace Recommended Practice (ARP) provides definitions and background information for understanding the physical performance, and test procedures of electrohydraulic flow control...
September 16, 1993
Electrohydraulic Servovalves
This SAE Aerospace Recommended Practice (ARP) is intended as a guide to aid in the specification and testing of electrohydraulic servovalves. The recommendations contained in this ARP are confined to...
November 1, 1978
ELECTROHYDRAULIC FLOW-CONTROL SERVOVALVES
The recommendations contained in this ARP are confined to the input and output characteristics of electrohydaulic flow-control servovalves. The information presented should be useful in standardizing...
January 15, 1975
ELECTROHYDRAULIC FLOW-CONTROL SERVOVALVES
The recommendations contained in this ARP are confined to the input and output characteristics of electrohydaulic flow-control servovalves. The information presented should be useful in standardizing...
April 30, 1970
ELECTROHYDRAULIC FLOW-CONTROL SERVOVALVES
The recommendations contained in this ARP are confined to the input and output characteristics of electrohydaulic flow-control servovalves. The information presented should be useful in standardizing...

References

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