選擇萊克電動球閥的依據(jù)是什么
原文:
進口電動球閥選擇的依據(jù)是什么?是控制元件,在流體管道系統(tǒng)的應(yīng)用中,是非常廣泛的,它的用途也非常多,對控制流量、壓力、回流等等,都有非常好的效果。由于電動球閥質(zhì)量的好壞,對管道的安全性,有很大的影響,所以在選擇電動球閥的時候,一定要按照一定的步驟和依據(jù)進行挑選。 電動球閥選擇的依據(jù)是什么?1、明確自己公司的管道的口徑,知道需要選擇什么樣口徑和連接方式的電動球閥。2、根據(jù)管道的需要,先確定電動球閥的一些常見參數(shù),比如排放能力、可以允許的流阻、閥座孔的通徑大小 等等,這些參數(shù)如果沒有選對,電動球閥控制流量的效果,就會大打折扣。3、根據(jù)管道的工作溫度,選擇合適的材質(zhì),當(dāng)然,管道的工作壓力,也是要考慮在內(nèi) 的。 另外,還要提醒的是,不要急著去挑選產(chǎn)品,要先了解現(xiàn)在流行的電動球閥產(chǎn) 品有哪些、性能如何,而了解這些的方法,就是聯(lián)系多家電動球閥的生產(chǎn)企業(yè),讓他們提供產(chǎn)品目錄、樣式等等,貨比三家,才能選擇到性價比的產(chǎn)品。
譯文:
What is the basis for the choice of electric valve? Is the cool element, in the application of fluid pipeline system, is a very broad, its use is very much also, to cool the flow, pressure, flow and so on, have very good results. Because the electric ball valve quality, safety of pipeline, have a great impact, so in the choice of electric valve, must be selected in accordance with the procedures and according to certain. What is the basis for the choice of electric valve? 1, clear the pipeline his company's caliber, know electric valve need to choose what kind of caliber and connection method. 2, according to the pipeline needs, to identify some common parameters of electric ball valve, such as discharge capacity, can allow the flow resistance, the valve seat hole diameter size and so on, these parameters if not elected to the electric ball valve, flow cool effect, will be greatly reduced. 3, according to the wong temperature of the pipeline, selecting suitable material, of course, the operating pressure of the pipeline, but also take into account. In addition, but also to remind is, do not rush to the selection of products, we should first understand the electric ball valve products popular now what, how performance, and know the best method, is much home electric ball valve manufacturing enterprises, allowing them to provide product catalog, style and so on, goods than three, we can choose to the highest cost- effective products.
電動裝置選型、確定功能要求時所須注意的要點
原文:
電動裝置選型、確定功能要求時所須注意的要點: 1.確定電動裝置的IP防護等級;
2.確定電動裝置的電源電壓;
3.確定電動裝置的90°運行時間;
4.確定電動執(zhí)行器的形式;
5.其他事項.
閥門電動裝置另有操作力矩、操作推力、輸出軸轉(zhuǎn)動圈數(shù)、閥桿直徑、輸出轉(zhuǎn)速及電動機功率等主要參數(shù)。該部分參數(shù)均應(yīng)由專業(yè)制造廠家確定。水系統(tǒng)閥門電動裝置工作的環(huán)境通常為常溫,而一般電動裝置的使用環(huán)境溫度是-20~120℃,所以可不提明確要求。
譯文:
Electric equipment type selection, to determine the functional requirements required to pay attention to the point:
1. To determine the electric actuator IP protection grade;
2. Determine the voltage of power supply electric actuator;
3. Determine the 90 ° running time of the electric device;
4. Determine the shape of electric actuators;
5. Other matters.
Otherwise operating the valve electric actuator torque, thrust operation, output shaft rotation circle number, stem diameter, main parameters, such as output rotational speed and power. This part of the parameters should be determined by the professional manufacturers.
Water system of valve electric device work environment is usually at room temperature, and general electric actuator using the environment temperature is 20 ~ 55 ℃, so don't make a clear request.
進口氣動球閥的特點及性能規(guī)范
特點
1、流體阻力小、球閥是所有閥類中流體阻力小的一種,即使是縮徑球閥,其流體阻力也相當(dāng)小。
2、止推軸承減小閥桿磨擦力矩,可使閥桿長期操作平穩(wěn)靈活。
3、閥座密封性能好,采用聚四氟乙烯等彈性材料制成的密封圈,結(jié)構(gòu)易于密封,而且球閥的閥封能力隨著介質(zhì)壓力的增高而增大。
4、閥桿密封可靠,由于閥桿只作反轉(zhuǎn)動運而不做升降運動,閥桿的填料密封不易破壞,且密封能力隨著介質(zhì)的壓力增高而增大。
5、由于聚四氟乙烯等材料具有良好的自潤滑性,與球體的磨擦損失小,故球閥的使用壽命長。
6、下裝式閥桿和閥桿頭部凸階防止閥桿噴出,如火災(zāi)造成閥桿密封破壞,凸階與閥體間還可形成金屬接觸,確保閥桿密封。
7、 防靜電功能:在球體、閥桿、閥體之間設(shè)置彈簧,能將開關(guān)過程產(chǎn)生的靜電導(dǎo)出。
執(zhí)行機構(gòu)采用新型系列GT型氣動執(zhí)行器,有雙作用式和單作用式(彈簧復(fù)位),齒輪齒條傳動,安全可靠;大口徑閥門采用系列AW型氣動執(zhí)行器拔叉式傳動,結(jié)構(gòu)合理,輸出扭矩大,有雙作用式和單作用式
1、齒輪式雙活塞,輸出力矩大,體積小。
2、氣缸選用鋁金材料,重量輕、外形美觀。
3、可在頂部、底部安裝手動操作機構(gòu)。
4、齒條式連接可調(diào)節(jié)開啟角度、額定流量。
5、執(zhí)行器可選帶電訊號反饋指示及各類附件以實現(xiàn)自動化操作。
6、IS05211標(biāo)準(zhǔn)連接為產(chǎn)品的安裝更換提供了方便。
7、兩端調(diào)的節(jié)螺釘可使標(biāo)準(zhǔn)產(chǎn)品在0°和90°有±4°的可調(diào)范圍。確保與閥門的同步精度。
附件的選項根據(jù)不同控制和要求可選擇下列附件:切斷型附件:單電控電磁閥、雙電控電磁閥、限位開關(guān)回訊器。
調(diào)節(jié)型附件:電氣定位器、氣動定位器、電氣轉(zhuǎn)換器。
氣源處理附件:空氣過濾減壓閥、氣源處理三聯(lián)件。
手動機構(gòu):ZTSD手操機構(gòu)
性能規(guī)范
公稱通徑mm DN15-300
材料代號
主要零件
閥 體 WCB ZG1Cr18Ni9Ti ZG1Cr18Ni12Mo2Ti 球 體 2Cr13 1Cr18Ni9Ti 1Cr18Ni12MoTi 閥 桿 2Cr13 1Cr18Ni9Ti 1Cr18Ni12MoTi
密封圈 增強聚四氟乙烯 對位聚苯 填 料 聚四氟乙烯 柔性石墨
適用工況
適用介質(zhì)
蒸汽、水、油品 硝酸類 醋酸類 適用溫度 -28℃ - 300℃
進口V型調(diào)節(jié)球閥的主要特點
V型調(diào)節(jié)球閥由于球芯帶有V型結(jié)構(gòu),對閥座具有剪切作用。因此適用于造紙、化工、冶金等工業(yè)企業(yè)中含有纖維或微小固體顆粒的懸濁液介質(zhì)中對有關(guān)工藝參數(shù)的控制,特別適用于制漿、造紙生產(chǎn)過程中的紙漿、白水、黑液、白液等懸浮顆粒的流體及濃、濁漿狀流體介質(zhì)的自動調(diào)節(jié)V型調(diào)節(jié)球閥主要特點
1、具有彈性負荷壓力輔助密封座保證閥座與球芯自努至終的緊密接觸
2、具有整體式的閥體結(jié)構(gòu),不存在產(chǎn)生潛在泄漏的可能
3、具有等百分比特性,有很寬的控制范圍和特別穩(wěn)定的控制過程,可廣泛用應(yīng)于多種工藝流程中
4、閥桿和球芯采用漸開線花鍵連接,當(dāng)齒廓受載時,齒上有徑向力能起自動定心作用,且各齒受力均勻使之強度高、壽命長
進口硬密封球閥的維修注意事項:
硬密封球閥在關(guān)閉狀態(tài)下,閥體內(nèi)部依舊存在受壓流體
維修前,解除管線壓力并使閥門處于打開位置
維修前,斷開電源或氣源
維修前,將執(zhí)行機構(gòu)與支架脫離
必須先查明球閥上、下游管道確已卸除壓力后,才能進行拆卸分解操作
分解及再裝配時必須小心防止損傷零件的密封面,特別是非金屬零件,取出○型圈時宜使用專用工具
裝配時法蘭上的螺栓必須對稱、逐步、均勻地擰緊
清洗劑應(yīng)與球閥中的橡膠件、塑料件、金屬件及工作介質(zhì)(例如燃氣)等均相容。工作介質(zhì)為燃氣時,可用汽油(GB484- 89)清洗金屬零件。非金屬零件用純凈水或酒精清洗
分解下來的單個零件可以用浸洗方式清洗。尚留有未分解下來的非金屬件的金屬件可采用干凈的細潔的浸漬有清洗劑的綢布(為避免纖維脫落粘附在零件上)擦洗。清洗時須去除一切粘附在壁面上的油脂、污垢、積膠、灰塵等
非金屬零件清洗后應(yīng)立即從清洗劑中取出,不得長時間浸泡
清洗后需待被洗壁面清洗劑揮發(fā)后(可用未浸清洗劑的綢布擦)進行裝配,但不得長時間擱置,否則會生銹、被灰塵污染
新零件在裝配前也需清洗干凈
使用潤滑脂潤滑。潤滑脂應(yīng)與球閥金屬材料、橡膠件、塑料件及工作介質(zhì)均相容。工作介質(zhì)為燃氣時,可用例如特221潤滑脂。在密封件安裝槽的表面上涂一薄層潤滑脂,在橡膠密封件上涂一薄層潤滑脂,閥桿的密封面及摩擦面上涂一薄層潤滑脂
硬密封球閥裝配時應(yīng)不允許有金屬碎屑、纖維、油脂(規(guī)定使用的除外)灰塵及其它雜質(zhì)、異物等污染、粘附或停留在零件表面上或進入內(nèi)腔
譯文: Hard seal ball valve maintenance Note:
hard seal ball valve in the closed position, the valve body remains pressurized fluid
repair, remove line pressure and the valve is in the open position
maintenance, disconnect the power supply or source
maintenance, the actuator and the support from
must identify the valve on the downstream pipeline pressure has indeed dropped after attempting to disassemble the operation
decomposition and re assembly must be careful to prevent damage to parts of the sealing surface, especially non-metallic parts, remove the O-type ring should use special tool
bolts on the flange must tighten the symmetry, gradually and evenly
cleaning agent should be with the ball in the rubber parts, plastic parts, metal parts and the wong medium (such as a gas) are compatible. Wong medium for the gas, the gas can be used (GB484-89) to clean metal parts. Pure water or alcohol to clean the with non metal parts
break down the individual parts can be cleaned using immersion method. Metal non metal still did not break down the left can be used to clean fine clean silk impregnated with cleaning agents (to prevent adhesion of fiber loss on the part) scrub. To be cleaned to remove all the adhesive on the wall of the grease, dirt, rubber product, dust and so on
non-metallic parts should be cleaned immediately removed from the cleaning agent, not soak a long time
need to be cleaned by washing the wall after volatile cleaning agent (cleaning agent can not dip silk rub) for assembly, but not a long time use, otherwise it will rust, the dust pollution
The new parts also need to be cleaned before assembly
use grease lubrication. Greases are compatible with the ball valve metal materials, rubber parts, plastic parts and the wong medium. Wong medium for the gas, can be used as special grease 221. Seals installed in the groove on the surface coated with a thin layer of grease on the rubber seal is coated with a thin layer of grease, valve stem sealing surface and the friction surface coated with a thin layer of grease
hard seal ball valve assembly should have metal fragments, fiber, fat is not allowed (except the requirement to use) dust and other impurities, foreign matter contamination, adhesion, or stay on the surface or in part into the cavity
球閥安裝注意事項
安裝前的準(zhǔn)備
⑴ 球閥前后管線已準(zhǔn)備好。前后管道應(yīng)同軸,兩法蘭密封面應(yīng)平行。管道應(yīng)能 承受球閥的重量,否則管道上必須配有適當(dāng)?shù)闹。?nbsp;把閥前后管線吹掃干凈,清除掉管道內(nèi)的油污、焊渣和一切其它雜質(zhì)。⑶ 核對球閥的標(biāo)志查明球閥完好無損。將閥全開全閉數(shù)次證實其工作正常。
⑷ 拆去球閥兩端連接法蘭上的保護件。
⑸ 檢查閥孔清除可能有的污物,然后清洗閥孔。閥座與球之間即使僅有微小顆 粒的異物也可能會損傷閥座密封面。
2、開始安裝球閥
⑴ 把閥裝上管線。閥的任何一端都可裝在上游端。用手柄驅(qū)動的閥可安裝在管 道上的任意位置。但帶有齒輪箱或氣動驅(qū)動器的球閥應(yīng)直立安裝,即安裝在 水平管道上,且驅(qū)動裝置處于管道上方。
⑵ 閥法蘭與管線法蘭間按管路設(shè)計要求裝上密封墊。
⑶ 法蘭上的螺栓需對稱、逐次、均勻擰緊。
⑷ 連接氣動管線(采用氣動驅(qū)動器時)。
3、球閥安裝后的檢查
⑴ 操作驅(qū)動器啟、閉球閥數(shù)次,應(yīng)靈活無滯澀,證實其工作正常。
⑵ 按管路設(shè)計要求對管道與球閥間的法蘭結(jié)合面進行密封性能檢查
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