Aviation Dictionary

Suction relief valve

A relief valve in an instrument vacuum system required to maintain the correct low pressure inside the instrument case for the proper operation of the gyros.

Dictionary Term

Suction relief valve

Definition

A relief valve in an instrument vacuum system required to maintain the correct low pressure inside the instrument case for the proper operation of the gyros.

References

Instrument Flying Handbook, Federal Aviation Administration, 2014
Pilot's Handbook of Aeronautical Knowledge, Federal Aviation Administration, 2023