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  楔形闸板闸阀的特点
Wedge Gate Valve Features

美国太平洋阀门

(1) 轭架套管 – 铝青铜轭架套管配置针形止推轴承,最大程度减少操作扭矩。
(1) Yoke Sleeve – aluminum-bronze yokesleeve has needle type thrust bearings to minimize operating torque.

(2) 阀杆 – 所有美国太平洋楔形闸板闸阀都配置T形头阀杆。这种结构使得楔形闸板能够自行调整,消除了阀杆弯曲影响楔形闸板的可能性。
(2) Stem – all Pacific wedged gate valves are provided with T-head stems. This design allows the wedge to self-align, eliminating the possibility of a bent stem jamming the wedge.

(3) 压力密封 – 结构简单,分段扣环和镀银低碳钢垫圈有助于拆卸,也使得阀帽的密封效果最好。
(3) Pressure Seal – uncomplicated design has segmented retaining ring and mild steel silver plated gasket to aid disassembly and provide maximum bonnet seal.

(4) 阀座环 – 硬面阀座环焊入阀体内。锥形结构不会使阀道受阻。
(4) Seat Ring – hardfaced seat rings are welded to body. Tapered design provides unobstructed flow path.

(5) 阀体 – 流线形流道最大限度减少压降。端到端尺寸符合ANSI B16.10的要求。大多数通径可以配置API 600壁厚的管道产品。
(5) Body – streamlined flow path minimizes pressure drop. End-to-end dimensions meet ANSI B16.10. Most sizes can be furnished with API 600 wall thickness.

(6) 执行机构 – 这些阀门可以配置电动、液动或气动执行机构。DN300以下配置标准手动手轮,DN350以上配置斜齿轮操作机构。
(6) Actuators – valves can be supplied with any type of electric, hydraulic or pneumatic actuator. Standard manual handwheels on valves 12" and smaller with 14"and larger bevel gear operated.

(7) 轭架 – 完全装配式轭架通过抗震测试,易于维护和安装执行机构。
(7) Yoke – fully fabricated yoke is seismically qualified while offering easy maintenance and actuator mounting.

(8) 压盖 – 两件式,自调节压盖,避免被弹出。
(8) Gland – two piece, self-aligning gland eliminates cocking.

(9) 请参阅细节A
(9) See Detail A

(8) 整体后座 – 硬面,使用寿命最长。
(8) Integral Backseat – hardfaced for maximum life.

(11) 楔形闸板 – 一件式,柔性楔形闸板,配置全程导向,预防由于热膨胀导致的粘附或弯曲;配置硬面阀座表面,延长使用寿命。也可提供平行阀座或实心楔形闸板。
(11) Wedge – one-piece, flexible wedge is fully guided, resists sticking or binding due to thermal expansion, has hardfaced seating surfaces for long life. Parallel seat or solid wedge also available.

 

柔性楔形闸板
Flexible wedge

  柔性楔形闸板为一件式、全程导向铸件楔形闸板,配置一个中心轮毂,使得阀座面可以进行各自相对移动,因此可以补偿由于热膨胀或管道负载所产生的阀体阀座扭曲。阀座环和楔形闸板阀座表面与垂直线成5度角,这样在开启和关闭过程中,楔形闸板与阀座环的滑动接触摩擦力降到最小。楔形的作用有助于在低压差应用中产生紧密的密封。柔性楔形闸板结构有助于防止在阀门热状态下关闭,或冷状态下开启应用中的楔形闸板的粘附或弯曲。阀座表面经过硬面处理,在很高的压差应用环境下具有更长的使用寿命。
  The flex wedge is a one piece, fully guided cast wedge with a central hub to allow the seating faces to move relative to each other thus compensating for distortion of the body seats due to thermal expansion or piping loads. Seat ring and wedge seating surfaces are set on a 5 degree angle from vertical to minimize sliding contact of the wedge and seat ring during opening and closing.Wedging actions help affect a tight seal in low differential pressure services. Flexible wedge construction resists wedge sticking or binding in services where the valve may be closed when hot and opened when cold. Seating surfaces are hardfaced to provide high cycle capability in very high differential pressure services.

 

 


细节A
Detail A

*在可适用的地方
*Where applicable
(1) 分段环
(2) 止推环*
(3) 垫圈
(4) 阀体
(5) 阀帽
(1) Segment Ring
(2) Thrust Ring*
(3) Gasket
(4) Body
(5) Bonnet
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