(1) 压力密封 – 结构简单，配置分段扣环和镀银低碳钢垫圈，有助于拆卸，并使阀帽密封达到最好状态。
(1) Pressure Seal – uncomplicated design has segmented retaining ring and mild steel silver plated gasket to aid disassembly and provide maximum bonnet seal.

(2) 内置阀瓣支架 – 独特的排列避免了销钉密封可能出现的泄漏，使维护更加简单。
(2) Internal Disc Hanger – unique arrangement eliminates pin seal leakage and simplifies maintenance.

(3) 阀座环 – 焊接阀座环经过硬面处理，使用寿命更长。
(3) Seat Ring – welded-in seat ring is hardfaced for long life.

(4) 阀体 – 流线形流道最大限度减小压降。端到端尺寸符合ANSI B16.10.
(4) Body – streamlined flow path minimizes pressure drop. End-to-end dimensions meet ANSI B16.10.

(5) 阀帽止动装置 – 维护简单，在拆卸期间保持阀帽不受干扰。
(5) Bonnet Stop – simplify maintenance by keeping bonnet from jamming during disassembly.

(6) 阀瓣 – 球形阀瓣，可以最大限度提升，并使压降减小到最小程度。经过硬面处理，最大限度延长使用寿命。
(6) Disc – spherical shape for maximum lift with minimum pressure drop. Hardfaced for maximum life.

主要结构特征
GENERAL DESIGN FEATURES

更高的效率
Highly Efficient

　　美国太平洋翻转式阀瓣止回阀在出现逆流时利用重力迅速关闭阀瓣。与其它大多数必须旋转90^o弧的翻转式阀瓣止回阀不同，美国太平洋翻转式阀瓣止回阀结构从全开到关闭只需旋转45^o弧。
　　The Pacific tilting disc check valve uses gravity to rapidly close the disc upon reversal of flow. Unlike most other tilting disc check valves which must swing through a 90^o arc, the Pacific design fully opens or closes through an arc of only 45^o.
　　绕轴旋转的阀瓣的重力中心距轴心较短，因此这种短弧的钟摆效应也比较小，从而确保能够迅速关闭。
　　This short-arc coupled with the low pendulum effect achieved by pivoting the disc through a point near its center of gravity assures rapid closure.

紧密式关闭
Tight Shutoff

　　圆锥形阀座与流向具有一定的角度，能够自行调整，在无流体状态下能够始终紧密关闭。甚至在垂直(流向朝上)管道上，这种阀门具有特别紧密地关闭特性。
　　Conical seating at an angle to flow is self aligning, tight and always closed in a no-flow situation. Even in vertical (flow-up) pipe runs, this valve provides exceptionally tight shutoff.

使用寿命
Long Life

　　经过硬面处理的阀座表面，大直径铰链销，以及防腐蚀轴承表面，有助于延长坚硬表面的使用寿命。在此没有可能断裂或扭曲的弹簧。一个有效的内置阀瓣止动装置避免了抖动现象的发生。
　　Hardfaced seating surfaces, large diameter hinge pins, and corrosion resistant bearing surfaces help lengthen operating life in tough surfaces. There are no springs to break or bind. A positive internal disc stop prevents flutter.

内置阀瓣铰链销
Internal Disc Hanger

　　具有可调整定位功能，避免阀体壳壁被穿透。独特的美国太平洋翻转式阀瓣止回阀内置阀瓣铰链销不但消除了穿透阀壳的铰链销可能出现的泄漏现象，而且由于经过机加工的支架平行于阀座表面，使得维修阀座时，能够调整阀瓣/阀座。通过安装或拆卸位于支架之间的、经过精加工过的不锈钢垫片，阀瓣可以“下落”到阀体内，以确保准确的对准和完全的关闭。其它结构都无法具备这种组合式功能。
　　Provides adjustable alignment, eliminates body wall penetrations. The unique Pacific tilting disc check valve internal disc hanger not only eliminates potential leakage through external hinge pins, but because the hanger shelf is machined parallel to the seating surface, it allows adjustment of the disc/seat if seat repair is ever required. By adding or removing precision stainless steel spacers between hanger and shelf, the disc can be “dropped” into the body so as to provide perfect alignment and shutoff. No other design offers this combination of features.