閘閥通常用于啟閉應用場合。不適用于節流應用場合。 Gate valves are normally used for on-off service. They are not recommended for throttling service. 閘閥通常安裝在水平管道上,其閥桿垂直向上。閘閥也可以安裝在垂直或水平管道上,其閥桿并不是垂直向上,但是此時要求具有特殊的結構,取決于閥門通徑、應用條件和材料等因素。如果訂購的閥門不是用于正常的安裝方式,則在訂購時,應該咨詢廠家并閥門的流向 Gate valves are normally installed in horizontal pipe runs with the valve stem vertically up They can also beinstalled in vertical or horizontal pipe runs with the valve stem other than vertical, but special construction maybe required depending on valve size, service conditions and material. When purchasing valves for other than thenormal installation, valve orientation should be specified when consulting the factor 在以足夠的力量關閉閘閥后,應該是閥桿稍微回轉一點(1/8至1/4轉),以減輕閥桿的負載。這將使得閥桿能夠稍微擴張,不至于彎曲或損壞閥門,也不影響閥門的關閉 After closing a gate valve with sufficient force to develop shutoff, the stem should be backed off slightly(1/to1 /4 turn)to relieve stem load. This will enable the stem to expａnd slightly without bending or damaging thevalye and will not affect valye shutoff 我們提供的閘閥的結構形式具有兩種:平行閥瓣和彈性楔形閘板。平行閥瓣為定位閥座密封;彈性楔形閘板在關閉時則是扭矩閥座密封 Gate valves are offered in two designs: Parallel Disc and Flexible Wedge. Parallel Disc are position seated; Flexible
選型 Selection 閥門種類和通徑 為計劃應用的領域選擇的閥門種類。閘閥具有各種楔形閘板或閥瓣和閥體的配置,適用于不同的應用場合。可以根據現存的管道來確定閥門的通徑,也可以根據實現最長使用壽命的流體條件來確定通徑。 TYPE AND SIZE Select the best type of valve for the intended service Gate valves are available with a selection of wedge or disc nd body configurations for different services. Valves may be sized to match existing lines, but they should also be sized according to flow conditions for maximum service life 額定壓力 所采用的閥門只能夠用在閥門所標注的針對閥門等級額定值和閥體/閥帽材料的ANS壓力溫度額定值的設計條件范圍內(參閱技術參數章節)。 RATINGS Valves must only be used in design conditions within the appropriate ANSi pressure-temperature ratings for valve class rating and body /bonnet material (see Technical Data section) 溫度局限 閥門只能夠在其結構溫度局限范圍內使用。閥體/閥帽材料的局限,閥內件、螺栓和填料及墊圈的溫度局限全都必須考慮到。如果需要,也可以提供特殊結構的、具有更廣泛溫度局限范圍的閥門。 TEMPERATURE LIMITATIONS Only use valves within the temperature limitations of their construction Temperature limitations of body/bonnet materials, trim, bolting and packing and gaskets must all be considered. Special construction for extended service temperatures are available on applicatio 材料和應用 壓力密封閥門具有寬廣范圍的閥體/閥帽材料和閥內件供用戶選擇。特殊的材料應該與應用場合相兼容 MATERIAL AND SERVICE Pressure Seal valves are available in a variety of body /bonnet materials and trims Specified materials should be compatible with the service.
