pressurization and dump valve
pressurization and dump valve


At the beginning of engine start, the fuel control supplies a pressure signal to the pressurizing and valve, causing the dump valve to close the manifold drain and open a passage for fuel flow to the engine. On engine shut down, fuel flow is cut off, pressure signal drops, and dump valve opens. The flow divider allows fuel to flow to the primary and secondary manifold, depending on fuel pressure.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved