A handling bleed valve (HBV) is a coaxial shutoff valve used in gas turbine aircraft engines. It controls the inflow of bleed air into aircraft systems. Bleed air is hot, compressed air that is drawn out from the aircraft’s engine and used for purposes other than fuel combustion.

The HBV is used for starting, transient bleed, and surge control of the bleed air. The valve is either fully open or fully closed during operation, and is fail-safe, spring-loaded open. Solenoids managed by the engine electronic computer (EEC) are used to pneumatically control whether the vlave is open or closed.

Among other things, bleed air modulated by the HBV is used for driving cabin pressurization, air conditioning, and anti-icing/de-icing systems. The release of bleed air from the engine also prevents pressure surging in the engine which would lead to undeseriable power surges or engine stall.

APPLICATIONS: Commercial aircraft engines

FEATURES AND ATTRIBUTES:
• Air filters installed into the handling bleed valve (HBV) prevent contaminants from traveling any further into the aircraft
• Adjustment screws on HBV units allow for adjustment of the unit without the need for disassembly
• Carbon guides and bushings provide structural support and minimize assembly leakage
• Body construction is 17-4 PH CRES, Inconel 718
• Guides and seals are carbon graphite

At Parker, our pneumatic subsystem expertise complements our fluid conveyance abilities in the engine environment. Available for virtually any specification or application, our cost-effective subsystems and components are well proven and reliable.

Designed for extreme engine environments, our engine controls offer a wide range of seamlessly integrated and optimized selections using advanced designs, materials, and actuation technologies.