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ISO 22181:2021

Aerospace fluid systems and components — Variable displacement hydraulic motors — General specifications

Feb 9, 2021

General information

90.60     Jun 5, 2026

ISO

ISO/TC 20/SC 10

International Standard

49.080  

English  

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Scope

This document establishes the general requirements for variable displacement uni-directional and bi-directional hydraulic motors, suitable for use in aircraft hydraulic systems at pressures up to 35 000 kPa (5 000 psi).
These requirements include:
— design requirements;
— test requirements.
Primary and secondary function motors (see Clause 4) are covered in this document; however, actuators with internal rotation angle limits and low-speed motors are not covered.
This document is intended to be used in conjunction with the detail specification that is particular to each application.

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PUBLISHED
ISO 22181:2021
90.60 Close of review
Jun 5, 2026