| 摘要 |
<p>A compressible anti-extrusion packing for sealing valve stems, shafts and rods having an interbraided, round braided or square braided outer layer disposed over a densified interbraided, round braided or square-braided core. In certain embodiments, the compressible packing includes a metal jacketed flexible graphite yarn interbraided as a core and an interbraided outer layer made of flexible graphite yarn with a carbon carrier. In one embodiment, the metal jacket is a knitted metal jacket. The core is densified by mechanical compression to control density and size.</p> |
