Function of Sealing Air System Gas Turbine

Function of Sealing Air System Points : Function of Sealing Air System Gas Turbine Sealing Air System There are four main seating points in a mechanical seal. The primary sealing point is at the seal face, Point A, This sealing point is achieved utilizing two very hat, lapped surfaces, perpendicular to the shaft that create a very treacherous leakage path leakage is further minimized by the rubbing cot act between the rotating and stationary faces, In most causes these two faces are made of an hard material like tungsten carbide and relatively shaft material like carbon graphite. The carbon seal faces generally has the smaller contact area and is the hearing face. The O.D and ED of the measuring face represent the seal lace dimension and are also generally referred to as a seal face throughout. The second leakage path point B is along the shaft under the rotating seal face. This path is blocked by the secondary 0-ring, An additional secondary 0-ring is point C, is used to prevent leakage between equipment case and the gland.