A bleed valve (100, 200) for use in a gas turbine engine of an aircraft, the bleed valve (100, 200) comprising: a high-pressure cavity (110, 210) having an interior surface, an interior volume, an exterior surface, a first end and a second end opposite said first end; a valve housing having an exterior surface, a first end, a second end opposite said first end, and a plurality of apertures (127, 128), said second end of said high-pressure cavity (110, 210) being coupled to said first end of said valve housing; a bellows (140, 240) for alternatively capturing and releasing pressurized fluids, said bellows having an interior surface, an interior volume, an exterior surface (146, a first movable end (142, 242) and a second fixed end opposite said first movable end (142, 242), said second fixed end of said bellows (140, 240) being operably coupled to one of said interior surface of said high-pressure cavity (110, 210) and said exterior surface of said valve housing, at a position substantially adjacent the second end of said high-pressure cavity (110, 210); a shaft (152, 252) having a first end and a second end opposite said first end, said first end of said shaft being operably coupled to the first movable end (142, 242) of said bellows (140, 240), said second end of said shaft being coupled to a system poppet (150, 250) configured to seal a valve seat (160, 260) substantially adjacent the second end of said valve housing, said shaft (152, 252) being sealed relative to the interior surface of said bellows (140, 240) to preclude undesired entry and release of any of said pressurized fluids therefrom; at least one cavity air port configured to inject a first of said pressurized fluids into the interior volume of said high-pressure cavity (110, 210) about the exterior surface of said bellows (140, 240), so as to exert a first pressure against said exterior surface of said bellows (140, 240), thereby compressing said bellows (140, 240); and at least one servo air port configured to inject a second of said pressurized fluids directly into the interior volume of said bellows (140, 240), so as to exert a second pressure against said interior surface of said bellows, thereby expanding said bellows (140, 240), characterized in that, said bleed valve (100, 200) being configured such that when the bleed valve (100, 200) is in its closed configuration, said system poppet (150, 250) is oriented to be sealed against the valve seat (160, 260), with the bellows in its compressed position. a high-pressure cavity (110, 210) having an interior surface, an interior volume, an exterior surface, a first end and a second end opposite said first end; a valve housing having an exterior surface, a first end, a second end opposite said first end, and a plurality of apertures (127, 128), said second end of said high-pressure cavity (110, 210) being coupled to said first end of said valve housing; a bellows (140, 240) for alternatively capturing and releasing pressurized fluids, said bellows having an interior surface, an interior volume, an exterior surface (146, a first movable end (142, 242) and a second fixed end opposite said first movable end (142, 242), said second fixed end of said bellows (140, 240) being operably coupled to one of said interior surface of said high-pressure cavity (110, 210) and said exterior surface of said valve housing, at a position substantially adjacent the second end of said high-pressure cavity (110, 210); a shaft (152, 252) having a first end and a second end opposite said first end, said first end of said shaft being operably coupled to the first movable end (142, 242) of said bellows (140, 240), said second end of said shaft being coupled to a system poppet (150, 250) configured to seal a valve seat (160, 260) substantially adjacent the second end of said valve housing, said shaft (152, 252) being sealed relative to the interior surface of said bellows (140, 240) to preclude undesired entry and release of any of said pressurized fluids therefrom; at least one cavity air port configured to inject a first of said pressurized fluids into the interior volume of said high-pressure cavity (110, 210) about the exterior surface of said bellows (140, 240), so as to exert a first pressure against said exterior surface of said bellows (140, 240), thereby compressing said bellows (140, 240); and at least one servo air port configured to inject a second of said pressurized fluids directly into the interior volume of said bellows (140, 240), so as to exert a second pressure against said interior surface of said bellows, thereby expanding said bellows (140, 240), characterized in that, said bleed valve (100, 200) being configured such that when the bleed valve (100, 200) is in its closed configuration, said system poppet (150, 250) is oriented to be sealed against the valve seat (160, 260), with the bellows in its compressed position.