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SAE ARP490

(R) Electrohydraulic Servovalves

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Organization: SAE
Publication Date: 1 February 2008
Status: active
Page Count: 80
scope:

This SAE Aerospace Recommended Practice (ARP) provides definitions and background information for understanding the physical performance, and test procedures of electrohydraulic flow control servovalves.

The recommendations are confined to interface definition and input/output characteristics. 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, as for example, valve polarity, mounting bolt and fluid port locations.

The ARP provides extensive guidance for the preparation of Procurement Specifications and for functional testing. A sample Procurement Specification is provided in Appendix A. The primary focus of this ARP is on four-way valves. Three-way valves are discussed to a limited extent and terminology for pressure control valves is presented in Appendix B.

This ARP is applicable to fluid power systems in all types of flight vehicles, and it is applicable to Military, Civil and Space design/certification standards. Additional specifications or specialized test procedures may be necessary to define special requirements for specific control systems, and such considerations are beyond the scope of this ARP.

intended Use:

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

Document History

SAE ARP490
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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