ARP490B: Electrohydraulic Servovalves - SAE International
Browse Standards ARP490B
Historical REVISED 1970-04-30

Electrohydraulic Servovalves ARP490B

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.
ARP490F
2008-02-08
Latest
Revised
ARP490E
1993-09-16
Historical
Revised
ARP490
1993-09-16
Historical
Revised
ARP490D
1992-07-01
Historical
Reaffirmed
ARP490C
1975-01-15
Historical
Revised
ARP490B
1970-04-30
Historical
Revised
ARP490A
1965-04-20
Historical
Revised

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