GRAPHITE PACKING SLEEVES AB22 AB28 GRAPHITE SEALING RINGS FOR BURNER BOILER

Packing sleeves are used in many brands of gauge cock. to prevent leakage and to ensure effective operation. They are made from 99.5% pure graphite, with stainless steel eyelets, the computer controlled compression, ensure a standard, quality product. ‘A popular application of graphite sleeve is to seal the drain cocks for level gauges (see. fig. below). The use of graphite sleeves provides smooth and reliable operation of the a cocks and high resistance to erosive action of the medium and pollution ‘Sealing rings are used in popular piston valves. In this type of valve instead of using seals. “socket - mushroom’ (used e.g. water taps), applied a solution, in which a cylindrical piston (usually steel) moves between two elastic sealing rings (usually graphite). Between two rings is placed a sealing bush with holes through which, upon exposure them by the piston, fluid flows. Thanks to its simple design, piston valves can be easily disassembled and replace worn parts - usually graphite sealing rings. This solution is characterized by good tightness, reliability and resistance to pollution and sediments. Due to its design, this type of valve can be operated (depending on the type of valve and the materials used) with a temperature of up to 550 °C (in the absence of pressure). With increasing fluid pressure (60 bar) allowable temperature is reduced (to 150°).