结构特征：
DESIGN FEATURES:

• 阀体和阀盖。经过精密加工的铸件。有其独特的是：阀瓣轴并没有贯穿阀体。
  Body and cover. Precision machined castings. Exclusive: Disc shaft does not penetrate body.
• 阀体和阀盖的连接。经过精密机加工，全封闭密封垫（密封垫材料参阅第3页）。
  Body and cover joint. Accurately machined, fully enclosed gasket (gasket materials on page 3).
• 阀瓣。坚固的一体式结构能够承受止回阀工作期间所受到的剧烈冲击。
  硬面采用13 CR、钨铬钴合金6、316不锈钢或蒙乃尔，经过研磨抛光达到镜面光洁度。
  通径DN50-DN150可以配置实心CA15 (13 CR)阀瓣。也可提供钨铬钴合金6覆面的316不锈钢阀瓣。
  Disc. Robust one-piece construction to withstand the severe shock of check valve service.
  Hardfaced with 13 CR, Stellite 6, SS 316, or Monel, ground and lapped to mirror finish.
  Sizes 2 –6" (50–150 mm) may have solid CA15 (13 CR) disc. SS 316 disc with Stellite 6 facing also available.

• 阀瓣总成。通过一个锁紧螺母和开口销将阀瓣安全紧固在阀瓣支架上。阀瓣旋转自如，避免定位磨损。阀瓣支架由坚固的、具有高级轴承品质的阀瓣支架铰链销支撑。从顶部可以接触到所有部件，维修简易。
  Disc assembly. Disc is fastened securely to disc hanger with a lock nut and cotter pin. Disc is free to rotate to avoid localized wear. Disc hanger is supported on a sturdy disc carrier hinge pin of excellent bearing qualities. All parts are accessible from top for easy servicing.
• 法兰。
  150/300磅级：¹/₁₆" 凸面。
  600磅级：¹/₄" 凸面。
  抛光度： 125-250 AARH，所有阀门。
  Flanges.
  Class 150/300: ¹/₁₆" raised face.
  Class 600: ¹/₄" raised face.
  Finish: 125–250 AARH for all valves.