一种价廉的高压往复运动密封圈已成功地用于1758大气压(25,000磅/英寸~2)。它由一个含石墨的聚四氟乙烯密封环,一个嵌入弹簧和一个支承环组成,摩擦较小,寿命长。密封环的横截面大,使其能承受高压和获得良好的密封效果;支承环的材料中含有尼龙,使其能耐挤压;弹簧用302型不锈钢 A cheap high-pressure reciprocating seal has been successfully used at 1758 atmospheres (25,000 psi). It consists of a PTFE-containing graphite seal ring, an embedded spring and a support ring, friction, long life. The cross-section of the seal ring is large, so that it can withstand high pressure and obtain good sealing effect; the material of the support ring contains nylon to make it resistant to extrusion; the spring is made of Type 302 stainless steel