闸阀
GATE VALVE

截止阀
GLOBE VALVE

锥形阀座
CONICAL SEAT

结构特征：
DESIGN FEATURES:

• 更安全、更紧密地阀杆密封。
  Safer and tighter stem seal.
• 又短又窄的填料腔改善了密封性能。
  Short and narrow packing chamber improves sealing effectiveness.
• 配置双填料和无泄漏的长寿命防泄漏填料腔或单填料。
  双填料：经过4000 psi压缩的两套石墨填料密封环。也可选择一个套环和leak-off，用于消除泄漏现象。
  单填料：在编织环之间放置三个或四个石墨环，密度80-90磅/立方英尺。
  Long-life leakproof packing chamber with double packing and leak-off or single set packing.
  Double packing: two sets of graphite packing rings compressed to 4000 psi. A lantern ring and leak-off provide option for removal of leakage, if any, from lower packing set.
  Single set packing: three or four graphite rings between braided rings, 80-90 lbs./cu. ft. density.
• 动负载。
  两套免维护长期保持阀杆紧密性的Belleville弹簧。
  Live-loading.
  Two sets of Belleville springs keep stem tight for long periods of time without maintenance.
• 两件式阀杆驱动可在线更新。
  Two-piece stem drive is renewable in-line.
• 更有效的防泄漏阀体-阀帽连接。
  150磅级：石墨填充波纹钢板密封垫。
  300-600磅级：全封闭螺旋缠绕石墨填充不锈钢密封垫。
  Stronger leakproof body-bonnet joint.
  Class 150: Corrugated graphite-filled steel gasket.
  Class 300-600: Fully-encased spiral wound graphite-filled stainless steel gasket.
• 300，600，900和1500磅级配置圆形阀帽和封闭密封垫。
  Classes 300, 600, 900 and 1500 have round bonnet and encased gasket
• 钨铬钴合金6硬面的焊接装配阀座。
  Welded-in seats hardfaced with Stellite 6.
• 柔性一件式楔板，采用钨铬钴合金6或13 CR硬面（DN200以上采用实心13 CR）。
  Flexible one-piece wedge, hardfaced with Stellite 6 or 13 CR (solid 13 CR up to 8").
• 13 CR硬化的阀杆，接近镜面的抛光度，延长填料的使用寿命。
  13 CR hardened stem with mirror-like, burnished finish for longer packing life.

大多数通径和压力等级的阀门配置锥形阀座 Most sizes and pressure classes have conical seats. 平面阀座 FLAT SEAT

除非用户指定， 否则制造商将 自行选择采用 平面阀座或锥 形阀座。 Choice of flat or conical seat is manufacturer’s option unless specified by customer.