设计和结构
　　Design and Consturction
　　美国Dezurik（德朱瑞克）双向刀闸阀配置独特的两级阀座，即使在终端应用场合，也能够实现双向气密性关闭功能。与其它设计不同的是，双向刀闸阀结合了密封面与圆周密封的双重优点。
　　The DeZurik Bi-Directional Knife Gate Valve provides a unique, two-stage seat allowing bubble tight shutoff in either direction, even on dead-end service. Unlike any other design, the Bi-Directional Knife Gate Valve provides a combination face and perimeter seal.
　　这种阀门专用于造纸、化工和电力行业的隔断和开启-关闭等应用场合，适用于处理清洁液体、浑浊液体、粘性液体和腐蚀性液体，淤泥，纤维泥浆，清洁和腐蚀性气体，以及干燥物质等流体介质。
　　The valve is designed for isolation and on-off applications in the paper, chemical and power industries. It is designed to handle clean, dirty, viscous and corrosive liquids; sludge; fibrous slurries; clean and corrosive gases; and dry materials.

　　双向关闭
　　Bi-Directional Shutoff
　　在完全150压力等级条件下，双向刀闸阀能够实现双向气密性关闭功能。没有预设流向，也不需要管线压力来实现密封。即使在最低压力条件下，闸板和阀座之间的交互界面也能够实现气密性关闭。双向刀闸阀的的任何一个方向都可以用在终端应用场合。
　　The Bi-Directional Knife Gate Valve provides bubble tight shutoff in both directions up to full 150 pressure rating. There is no recommended flow direction - and it doesn't require line pressure to seal. The interference fit between the gate and seats provides bubble tight shutoff, even under the lowest pressure. The Bi-Directional Knife Gate Valve can be used in either direction on dead-end service.

　　独特的阀座设计结构
　　Unique Seat Design
　　阀座采用独特的两级设计结构。第一级由用于阀门流道上部三分之二部分的闸板两侧的弹性密封面构成，支撑和引导闸板，并实现双向紧密密封。在流道下部三分之一部分采用月牙形弹性阀座，实现对闸板的全圆周密封，避免出现可能淤积杂质的空隙出现。
　　The seat is a unique, two-stage design. The first stage consists of a resilient face seal on both sides of the gate for the upper two-thirds of the valve port, which supports and guides the gate and provides tight sealing in both directions. The second stage is the perimeter seal. The resilient seat is crescent shaped at the bottom third of the port which seals off the perimeter of the gate and eliminates pockets where material can collect.

　　密封面与圆周密封的结合
　　Combination Face and Perimeter Seal
　　闸板的平面底部与阀座的下端部分能够实现完全圆周密封，避免阀座底部出现可能淤积流体介质、导致阀门无法完全关闭的空隙。阀座上部设计结构提供针对闸板的密封面，避免过分挤压密封橡胶及破坏口袋密封效果。这种独特的设计结构在阀门的任何一个方向均能实现气密性关闭功能。
　　The flat bottom gate provides full perimeter seating against the lower portion of the seat, eliminating pockets in the bottom of the seat that can trap process media and prevent the valve from fully closing. The upper portion of the seats are designed to provide a face seal against the gate without over stressing the rubber or disturbing the pocket seal. This unique design provides bubble tight shutoff in either direction.