Sealing is achieved when compression load is high and packing forms a mass of low porosity and permeability (4,000 psi for graphite).

• 大负载。密封安装是在很高的压缩负载下进行,这样填料就会形成一块低多孔性和渗透性的材料(对于石墨压力达4,000 psi)。