閘閥通常用于啟閉應(yīng)用場合。不適用于節(jié)流應(yīng)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(shí)要求具有特殊的結(jié)構(gòu),取決于閥門通徑、應(yīng)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(shí),應(yīng)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(guān)閉閘閥后,應(yīng)該是閥桿稍微回轉(zhuǎn)一點(diǎn)(1/8至1/4轉(zhuǎn)),以減輕閥桿的負(fù)載。這將使得閥桿能夠稍微擴(kuò)張,不至于彎曲或損壞閥門,也不影響閥門的關(guān)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(jié)構(gòu)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(guān)閉時(shí)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(jì)劃應(yīng)用的領(lǐng)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(yīng)用場合。可以根據(jù)現(xiàn)存的管道來確定閥門的通徑,也可以根據(jù)實(shí)現(xiàn)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(biāo)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(shè)計(jì)條件范圍內(nèi)(參閱技術(shù)參數(shù)章節(jié))。 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(jié)構(gòu)溫度局限范圍內(nèi)使用。閥體/閥帽材料的局限,閥內(nèi)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(jié)構(gòu)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(yīng)用       壓力密封閥門具有寬廣范圍的閥體/閥帽材料和閥內(nèi)件供用戶選擇。特殊的材料應(yīng)該與應(yīng)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.