overload valve

overload valve

A valve in the flap system that prevents the flaps from being lowered at speeds that may cause structural damage. The valve comes into operation by the excessive air loads on the flap if the pilot tries to lower them at higher than permissible speeds. Also known as a flap-overload valve or a blow-back valve
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
To protect hydraulic components, the hydraulic pump, reservoir and DC pump motor include an integrated overload valve. The trucks come in capacities of 6,000 and 8,000 pounds.