A valve assembly comprises a closure element (14B) disposed in a flow control duct (16), a fluid-driven actuator assembly (20), a shaft (14C) operable to translate linear movement of the actuator assembly (20) into rotation of the closure element (14B), an...

An environmental control system (30) includes a higher pressure tap (134) to be associated with a higher compression location (134) in a main compressor section (254) associated with a gas turbine engine (210). A lower pressure tap (32) is associated with ...