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A swing check valve (or tilting disc check valve) is a check valve in which the disc, the movable part to block the flow, swings on a hinge or trunnion, either onto the seat to block reverse flow or off the seat to allow forward flow. The seat opening cross-section may be perpendicular to the centerline between the two ports or at an angle.
Modern aircraft with MSG-3-derived maintenance programs employ usage parameters — such as flight hours, calendar time, or flight cycles — for each required maintenance task included in the MRBR aimed to avoid and/or timely correct certain failures of an aircraft systems and parts thereof.
Active clearance control (ACC) is a method used in large aircraft gas turbines to improve fuel efficiency during cruise. This is achieved by setting the turbine tip clearance at more than one operating point and contrasts with passive clearance control which sets it for only one condition and is explained below.
A single-engine piston aircraft has a simple fuel system; a tanker (such as the KC-135), in addition to managing its own fuel, can also provide fuel to other aircraft. [ 1 ] Fuel is piped through fuel lines to a fuel control valve (usually known as the fuel selector).
In the event the OFV should fail closed, at least two positive pressure relief valves (PPRV) and at least one negative pressure relief valve (NPRV) are provided to protect the fuselage from over- and under- pressurization. Aircraft cabin pressure is commonly pressurized to a cabin altitude of 8000 feet or less.
It began making air compressors , [5] anti-g valves, [6] pressure reducing valves, stop valves and fuel system relief valves. [7] [8] Most well-known British aircraft in the 1950s and 1960s contained their valves and pneumatic equipment. It developed the fuel system for Concorde. [9] [10] Concorde carried around 22,000 gallons of fuel. Concorde ...
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