This Aerospace Recommended Practice (ARP) provides design and test requirements for factory precharged, welded bellows hydraulic accumulators.

Purpose

The requirements contained in this ARP are recommended for inclusion in a Procurement Specification for this type of accumulator.

NOTE: Those requirements identified by the use of "shall" are considered to be essential requirements; those requirements identified by the use of "should" are considered to be optional requirements for inclusion in the Specification at the discretion of the Purchaser.

In addition, test methods for production acceptance and qualification purposes are also provided to permit a consistent approach for testing to be conducted for the different applications of this type of hydraulic accumulator.

Field of Application

The accumulator is intended for use in military aerospace hydraulic systems with rated pressures of up to 8000 psi (55 158 kPa) and the following types as specified in AS5440:

Type I: -65 to +160 °F (-54 to +71 °C) hydraulic fluid temperature

Type II: -65 to +275 °F (-54 to +135 °C) hydraulic fluid temperature

The accumulator is also intended for use in commercial aerospace hydraulic systems.