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SAE AS 5440 Document Information:
Title
Hydraulic Systems, Aircraft, Design and Installation Requirements for
SAE International
Publication Date:
Apr 1, 1998
Scope:
1. SCOPE:
1.1 Scope:
This specification covers the design and installation requirements for
Types I and II aircraft
hydraulic systems.
1.2 Classification:
Aircraft hydraulic systems shall be of the following types and
classes, as specified:
1.2.1 Types:
Type I Maximum fluid operating temperature +160°F (+71°C).
Type II Maximum fluid operating temperature +275°F (+135°C).
1.2.2 Classes: The class of operating pressure shall consist of the
following:
a. Class 1500. 1500 psi nominal operating pressure
b. Class 3000. 3000 psi nominal operating pressure
c. Class 4000. 4000 psi nominal operating pressure
d. Class 5000. 5000 psi nominal operating pressure
e. Class 8000. 8000 psi nominal operating pressure
For multiple operation pressure level systems, such as 5000 psi and
3000 psi, the highest pressure
shall determine the pressure class. The pressure class shall be
annotated with a "V" to indicate
variable pressures (example: class 5000V)
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