(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 –
(2) Stem –

• 螺纹长度直到托架
  Threaded to carrier
• 销钉和点焊
  Pinned and tack welded
• 具有稳定性
  Provides stability

(3) 压力密封 – 结构简单，配置分段扣环和镀银低碳钢垫圈，有助于拆卸和实现最好的阀帽密封。
(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 – 焊接阀座环垂直于流动通道，易于维护。
(4) Seat Ring – welded-in seat rings are perpendicular to the flow bore for easy maintenance.

(5) 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。
(5) 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.

(6) 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。
(6) Yoke – fully fabricated yoke is seismically qualified while offering easy maintenance and actuator mounting.

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

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

(9) 阀瓣 – 弹簧负载阀瓣能够自行调节，减少执行机构的扭矩需求。
(9) Discs – Spring loaded discs are self-aligning and reduce actuator torque requirements.

(10) 整体止动 – 整体铸造托架止动装置，定位组装的托架阀瓣，使得阀座更加稳定可靠。
(10) Integral Stop – Integrally cast carrier stop positions carrier disc assembly for reliable seating.

平行阀座闸阀
Parallel Seat Gate Valve

　　平行阀座闸阀和阀座环结构可以应用在高压差应用环境中，或者高管道负载，或可能导致楔形闸板闸阀卡住的热膨胀应用环境中。平行阀座闸阀由两个可互换弹簧负载阀瓣，一个全导向阀瓣托架和扣环销钉构成。
　　Parallel seat gate and seat ring construction can be furnished for high differential pressure services or where high piping loads or thermal expansion may cause sticking of a wedge type gate. The parallel seat gate assembly consists of two interchangeable spring loaded discs, a fully guided disc carrier, and retaining pins.
　　定位阀座消除了由于阀杆的热膨胀导致的应力和可能的弯曲。弹簧负载阀瓣有助于在压差较低的应用环境中产生更紧的密封。阀瓣都是可互换的，因此在线维护更加简单，避免了为阀瓣定制特殊的阀座的要求。内置的止动装置为动力执行机构提供行程保护，并且作为参考坐标在开启和关闭位置定位阀瓣。这种结构的优点在于阀座扭矩低，所需执行机构小，因此也降低了成本。硬面阀座表面使得阀门在很高的压差应用环境中具有更长的使用寿命。
　　Position seating eliminates stress and potential binding due to thermal expansion of the stem. Spring loaded discs help affect a tight seal in low differential pressure services. Discs are interchangeable which simplifies in-line maintenance and eliminates the need to custom fit the seats to the discs. Internal stops provide positive over travel protection for power actuated valves and act as a reference to position the discs in the open and closed positions. This design features low seating torque which reduces actuator size and cost. Hardfaced seating surfaces provide high cycle capability in very high differential pressure services.

优点
Features

• 自行调整可互换阀瓣
  Self aligning interchangeable discs
• 没有楔入的力量；阀瓣不受热变化的影响
  No wedging force; disc reacts freely to thermal changes
• 均匀一致的阀座磨损
  Uniform seat wear
• 有效的阀瓣行程止动装置模铸到阀体中
  Positive disc travel stops cast into body
• 扭矩低，因此所需的执行机构也可以较小
  Lower torque may allow smaller actuator
• 维护简易
  Ease of maintenance
• 用于关闭的定位阀座
  Position seated for closure