Automatic Reservoir Bleed (ARB) Valve

Air causes problems if it is present in pressurised hydraulic systems.

Normally, the maintenance ground crew purges the air from the hydraulic system using bleed ports conveniently located on the circuit-on the pressurized reservoir or another high point, for example.

The Pall ARB valve automatically bleeds the entrapped air or other gases from the hydraulic fluid reservoir as the system cycles through its pressure envelope.