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闸阀
  ·排渣闸阀,排渣闸阀型号
  ·弹性座封闸阀,暗杆弹性座封闸阀,明杆弹性座封闸阀
  ·法兰闸阀,不锈钢法兰闸阀,国标法兰闸阀,美标法兰闸阀
  ·钢制楔式闸阀,不锈钢制楔式闸阀,手动钢制楔式闸阀
  ·铸铁楔式闸阀,铸铁楔式闸阀尺寸,铸铁楔式闸阀价格
  ·气动钢制排渣闸阀,PZ641H气动钢制排渣闸阀
  ·锥齿轮传动楔式闸阀
  ·暗杆楔式单闸板闸阀,暗杆闸阀,暗杆闸阀图片,暗杆闸阀尺寸,暗杆闸阀价格
  ·承插焊楔式闸阀,承插焊楔式闸阀尺寸,不锈钢承插焊楔式闸阀
  ·电动不锈钢楔式闸阀,电动不锈钢楔式闸阀原理,电动不锈钢楔式闸阀图片
  ·电动楔式闸阀,电动楔式闸阀原理,电动楔式闸阀尺寸
  ·电动楔式铸铁闸阀
  ·锥齿轮传动楔式闸阀,锥齿轮传动楔式闸阀尺寸
  ·法兰连接电动排渣阀
  ·高压电站闸阀
  ·平行式双闸板闸阀
  ·气动浆液阀,气动浆液阀型号
  ·美标闸阀,美标钢制闸阀,美标钢制闸阀图片,美标钢制闸阀尺寸
球阀
  ·内螺纹球阀_内螺纹球阀图片_内螺纹球阀尺寸
  ·广式球阀_法兰广式球阀_广式法兰球阀图片
  ·三片式球阀_三片式球阀尺寸_三片式球阀图片
  ·浮动式球阀_浮动式球阀型号
  ·自动复位球阀_弹簧自动复位球阀_自动复位球阀原理
  ·衬氟球阀-衬氟球阀型号-衬氟球阀尺寸
  ·锻钢球阀,锻钢球阀型号,锻钢球阀尺寸
  ·不锈钢球阀,不锈钢球阀型号,不锈钢球阀图片
  ·气动球阀,防暴气动球阀,气动球阀原理,不锈钢气动球阀
  ·法兰球阀,法兰球阀尺寸,不锈钢法兰球阀
  ·三通球阀,三通球阀尺寸,T型三通球阀,不锈钢三通球阀
蝶阀
  ·衬氟蝶阀,衬四氟蝶阀,衬氟蝶阀尺寸
  ·气动蝶阀,不锈钢气动蝶阀,气动软密封蝶阀
  ·对夹式蝶阀,对夹式硬密封蝶阀
  ·软密封蝶阀
截止阀
  ·柱塞截止阀,柱塞截止阀尺寸
  ·氧气专用截止阀,氧气截止阀原理,氧气专用截止阀尺寸
  ·锻钢截止阀,锻钢法兰截止阀,锻钢波纹管截止阀
  ·低温截止阀-不锈钢低温截止阀-低温截止阀尺寸
  ·衬氟截止阀,防腐截止阀,衬四氟截止阀
  ·保温夹套直流式截止阀,保温夹套直流式截止阀尺寸
  ·节流截止放空阀,节流截止放空阀图片
  ·Y型截止阀-Y型截止阀型号-Y型截止阀尺寸
  ·不锈钢截止阀,不锈钢截止阀图片,不锈钢截止阀型号
  ·衬氟角式截止阀,耐腐衬氟角式截止阀
  ·衬胶截止阀,衬胶手动截止阀,衬胶法兰截止阀
  ·国标低温截止阀,国标低温截止阀尺寸,国标低温截止阀标准
  ·法兰截止阀,法兰铸钢截止阀,不锈钢法兰截止阀
  ·高压对焊截止阀,高压对焊截止阀标准
  ·国标截止阀,国标截止阀图片,国标截止阀尺寸
  ·角式截止阀,角式截止阀型号,角式截止阀尺寸
  ·美标波纹管截止阀,不锈钢美标波纹管截止阀,美标波纹管截止阀尺寸
  ·燃气截止阀,液化气截止阀,天然气截止阀
  ·针型截止阀,不锈钢针型截止阀
  ·焊接针型截止阀♀J61Y高压高温针型截止阀
  ·承插焊截止阀,承插焊截止阀图片,承插焊截止阀尺寸
  ·多功能截止阀,CJ123H型号
  ·内外螺纹截止阀,内外螺纹截止阀尺寸
  ·内螺纹截止阀,内螺纹截止阀型号
  ·外螺纹截止阀,J23W外螺纹截止阀
  ·外螺纹截止阀,外螺纹截止阀图片,外螺纹截止阀尺寸
  ·美标截止阀,美标法兰截止阀,美标波纹管截止阀
  ·氨气截止阀,氨气截止阀尺寸
  ·高温截止阀,高温截止阀型号
  ·卡套截止阀,卡套式截止阀,卡套截止阀图片
  ·角座阀-气动角座阀-不锈钢角座阀-角座阀尺寸
调节阀
  ·气动调节阀,不锈钢气动调节阀,气动调节阀原理
电磁阀
减压阀
柱塞阀
止回阀
  ·不锈钢止回阀,泵房止回阀,不锈钢止回阀原理
  ·超薄型止回阀,超薄型止回阀原理,超薄型止回阀尺寸
  ·衬氟止回阀 -衬氟止回阀尺寸
  ·衬胶止回阀 防腐衬胶止回阀 橡胶衬里止回阀
  ·蝶形止回阀 蝶式止回阀 不锈钢蝶式止回阀
  ·内螺纹止回阀-内螺纹止回阀原理-内螺纹止回阀尺寸
  ·对夹式止回阀 弹簧对夹式止回阀 不锈钢对夹式止回阀
  ·单向阀,卡套式单向阀,内螺纹单向阀
过滤器
  ·手摇式过滤器
  ·T型过滤器
  ·Y型过滤器
  ·高低接管弧底型过滤器
  ·精细过滤器
  ·立式低进测出过滤器
  ·卧式过滤器
  ·直通弧底过滤器
  ·直通平底型过滤器
  ·压差自控过滤器
  ·不锈钢空气过滤器,不锈钢空气过滤器生产厂家
氧气阀门
  ·铜氧气阀,铜氧气阀尺寸,氧气专用截止阀
  ·氧气减压阀,不锈钢氧气减压阀,氧气专用减压阀
  ·氧气截止阀,氧气专用截止阀,氧气截止阀尺寸
  ·氧气截止阀,氧气专用截止阀,氧气截止阀尺寸
  ·氧气过滤器, 氧气Y型过滤器, 燃气Y型过滤器, 氧气专用过滤器
  ·氧气阀,角式氧气阀
  ·青铜闸阀,美标青铜闸阀,德标青铜闸阀
  ·青铜截止阀,美标青铜截止阀,德标青铜截止阀
  ·青铜球阀,美标青铜球阀,德标青铜球阀
美标阀门
  ·美标截止阀,美标法兰截止阀,美标截止阀标准
  ·美标闸阀,美标闸阀型号,美标闸阀尺寸
  ·美标止回阀,美标止回阀型号,不锈钢美标止回阀
  ·美标闸阀,美标闸阀尺寸,不锈钢美标闸阀
卫生级阀门
  ·卫生级蝶阀,卫生级快装蝶阀,卫生级卡箍蝶阀,气动卫生级蝶阀
  ·卫生级球阀,卫生级快装球阀,卫生级卡箍球阀,卫生级电动球阀
  ·卫生级安全阀,卫生级快装安全阀,卫生级卡箍安全阀
波纹管阀门
  ·德标波纹管截止阀,德标波纹管截止阀尺寸,德标波纹管截止阀标准
  ·波纹管球阀,波纹管球阀型号,波纹管球阀尺寸
  ·波纹管截止阀-波纹密封管截止阀-氢气波纹管截止阀
水利控制阀
  ·800X压差旁通阀♀800X压差旁通阀生产厂家♀800X压差旁通阀尺寸标准
  ·700X多功能水泵控制阀♀700X多功能水泵控制阀生产厂家♀700X多功能水泵控制阀尺寸
  ·600X水力电动控制阀♀上海600X水力电动控制阀生产厂家♀600X水力电动控制阀尺寸
  ·500X泄压阀♀500X泄压/持压阀♀上海500X泄压阀生产厂家♀500X泄压阀尺寸
  ·400X流量控制阀♀水泵流量控制阀♀上海400X流量控制阀生产厂家♀400X流量控制阀尺寸
  ·300X缓闭止回阀-缓闭止回阀尺寸标准-缓闭止回阀生产厂家
  ·200X减压稳压阀-上海200X减压稳压阀生产厂家-200X减压稳压阀尺寸
  ·100X遥控浮球阀 上海100X遥控浮球阀生产厂家 100X遥控浮球阀尺寸
  ·100X定水阀 上海100X遥控浮球阀生产厂家 水箱遥控浮球阀尺寸
保温阀_系列
仪表阀_针型阀
  ·卡套式球阀,双卡套球阀,单卡套球阀,卡套异径球阀,卡环式球阀
  ·三通卡套球阀,三通卡套式球阀,不锈钢三通卡套球阀
  ·仪表截止阀,仪表针形截止阀,焊接仪表截止阀,仪表针型阀
  ·卡套针阀,卡套式针阀,卡套针阀尺寸,卡套针型阀
  ·气源球阀,卡套式气源球阀,气动管路球阀
  ·J29W,压力计截止阀,不锈钢压力计截止阀
  ·J13W,内螺纹针型阀,不锈钢内螺纹针型阀
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    新闻中心 News 您的位置:首页>新闻中心>阀门的安装概要说明|阀门安装说明书
阀门的安装概要说明|阀门安装说明书
点击次数:1428 来源网站:http://www.wtfm.cc 发布时间:2019-07-11<

阀门的安装概要说明-由上海沃托阀门有限公司提供
概要:
务必记住所推荐的阀门的用途是什么,并对所应用的环境进行分析,这样才能决定最适合于安装什么样的阀门。在安装正确的阀门之前,为了防止损坏阀门,并保证充分发挥阀门的工作性能,请阅读一下安装指南。
1. 先沿着垂直方向切割管道,并修整、去除毛刺,测量管径。
2. 使用纱布或钢丝刷清除管道和切割部位,使其金属表面发光发亮。建议不要使用钢丝绒。
3. 在管道的外面和焊接罩的内部涂上焊剂,焊剂必须完全覆盖焊接表面。请有节制地使用焊剂。
4. 要确保阀门处于开启状态。先对管道加热。尽可能多的将热从管道传递到阀门。避免延长阀门本身的加热时间。
4a. 银钎焊的方法:
对需要进行钎焊的部件进行组装。如果允许涂上焊剂的部件处于直立状态,那么焊剂中的水分会蒸发掉,而干燥的焊剂很容易脱落,致使暴露的金属表面容易被氧化。在进行连接组装时,要将管道插入管套直到遇到阻挡为止。组装是要保证有稳固的支撑,使得整个钎焊操作过程中能够保持在直线位置。
注:对于1英寸或更大公称通径的阀门,一次性将连接部件加热到所需温度比较困难。为了在整个大面积上保持正常的温度,通常情况下需要两个焊枪。建议对整个管套区域进行适当的预热。建议采用乙炔火焰对连接部件进行加热。首先从离阀门1英寸的地方开始对管道进行加热,然后围绕着管道短距离上下交替对管道进行火焰烘烤,并以适当的角度旋转管道,避免烧穿管道。火焰要连续运动,不允许停留在某一点上。
在阀门的套筒底座用火焰进行烘烤。加热要均匀,用火焰对阀门及管道进行火焰烘烤的过程要延续到阀门上的焊剂不再发出声音。不要对阀门过度加热。
当焊剂变成液态并且在管道和阀门上呈现半透明状态时,开始将火焰沿着连接部件的轴线进行进退烘烤,以保持连接部件、特别是阀门套筒底座部位的热度。
5. 使用适量的焊料:如果使用线状焊料,那么对公称通径为3/4英寸的阀门就要采用3/4英寸的焊料,等等。如果使用的焊料太多,那么有些焊料可能会流过管道阻挡部位,并堵塞密封区域。在安装连接部件时,可以看到焊料和钎焊合金继续流动
5a. 银钎焊法:
将焊线或焊杆点在阀门里的管道套座上。当焊杆或焊线进入连接处时要将火焰从其上面移开。当合金流进连接处时,要前后移动火焰。达到适当的温度后,合金将迅速容易地流进管道外壳和阀门套管之间的空间。连接处被充满后,就会看到焊接合金的边缘。
6. 当焊料处于粘滞状态时,用刷子把多余的焊料清除干净。焊料冷却后,将一条嵌条环绕在阀门的端口。
银钎焊
如果采用不同的钎焊材料,其钎焊连接的强度并不见得很好,强度大小取决于管道外壳与阀门套管之间正常的、大范围的清洁维护工作。银钎焊的阀门套管的内部直径的机械公差和表面光滑度要求非常精确,以确保有足够的附着力。
注意:在清理和清除过程中,应该细心的观察清洗介质的残留物。在已经弄脏或不正确清洗的表面上进行钎焊,焊接效果就很难令人满意,因为银钎焊合金并不会流过或粘接在氧化物上,而油污的表面及暴露的、容易氧化和导致空隙和杂物排斥焊剂。
螺纹连接
硬渣、污物或任何外部物质在管道内积累都可能妨碍阀门的工作效率并严重损坏阀门的关键部件。必须用空气或蒸气对管道内部进行彻底清洗。当对管道进行攻丝时,要测定管道螺纹的尺寸和长度,避免将管道塞满阀座和阀瓣。彻底清洗螺纹末端,清除任何有害的钢或铁沉淀物。如果要时焊接更牢固,就要使用特氟隆带或管道粘接剂。在管道螺纹上只能少量使用管道粘接剂,但是在阀门螺纹上绝对不能使用管道粘接剂。不要让任何管道粘接剂流入阀体内,以避免损坏阀瓣和阀座。
安装前,切断通过阀门的流体,以使阀门工作正常。安装前要完全关闭阀门。将扳手套在靠近管道的六角螺栓头上避免可能产生的变形。安装阀门后,要支撑住管道:下垂的管道会使阀门产生变形而导致失败。
法兰连接
为了确保正确进行阀兰连接安装,需要遵循如下几个步骤。首先细心地清洗连接处,然后,在底座部松散地装上两个或三个螺栓。接着,小心的将垫片插入连接处。底部螺栓有助于对垫片进行定位,并保持恰当的位置。然后插入螺栓要采用交叉旋紧的方式,不要采用环绕旋紧的方式,这样有助于消除过于集中的压力)。在正常使用一段时间后,要检查核对所有的螺栓是否旋紧,并进行必要的再旋紧。
SOLDERING AND SILVER BRAZING

Analyze the application to determine which valve is best suited for installation, keeping in mind the service for which the valve is recommended. Before installing the correct valve, review the installation instructions to prevent damage to the valve and assure its maximum efficiency.
1.  Cut tube end square. Ream, burr and size.
2. Use sand cloth or steel wire brush to clean both tube and cut to bright metal. Steel wool is not recommended.
3.  Apply flux to outside of tube and inside of solder cup. Surfaces to be joined must be completely covered. Use flux sparingly.
4. Be sure that valve is fully open. Apply heat to tube first. Transfer as much heat as possible through tube into valve. Avoid prolonged heating of valve itself.
4a. Silver Brazing Method:
Assemble parts to be brazed. If fluxed parts are allowed to stand, the water in the flux will evaporate; and dried flux is liable to flake off, exposing metal surfaces to oxidation. Assemble joint by inserting tube into socket hard against the stop. The assembly should be firmly supported so that it will remain in alignment during the brazing operation.
NOTE: On one inch and large valves, it is difficult to bring the whole joint up to temperature at one time. It will frequently be found desirable to use a double tip torch to maintain the proper temperature over the large area. A mild pre-heating of the whole socket area is recommended. Apply heat to parts to be joined. The preferred method is by oxy-acetylene flame. Heat tube first, beginning one inch from edge of valve. Sweep flame around tube in short strokes up and down at right angles to run of tube. To avoid burning through tube, the flame should be in continuous motion and not allowed to remain on any one point.
Apply flame to valve at base of socket. Heat uniformly, sweeping flame from valve to tube until flux on valve becomes quiet. Avoid excessive heating of valve.
When flux appears liquid and transparent on both tube and valve, start sweeping flame back and forth along axis of joint to maintain heat on parts to be joined, especially toward base of valve socket.
5. Use just enougn solder: with wire solder, use 3/4" for a 3/4" valve, etc. If too much solder is used, it may flow past tube stop and clog sealing area. When joint is filled, a continuous run of solder or brazing alloy will be visible.
5a. Silver Brazing Method:
Apply brazing wire or rod at point where tube enters valve socket. Keep flame away from rod or wire as it is fed into the joint. Move flame back and forth as alloy is drawn into joint. When the proper temperature is reached, alloy will flow readily into space between tube outer wall and valve socket. When joint is filled, a continuous rim of brazing alloy will be visible.
6. Remove excess solder with small brush while plastic, leaving a fillet around end of valve as cools.

SILVER BRAZING

  The strength of a brazed joint does not vary appreciably with the different brazing materials, but depends to a large extent upon the maintenance of proper clearance between the outside of the tube and the valve socket. The interior dimensions of silver brazing valve sockets are machined to the closest tolerances and finished smooth to promote full capillary attraction.
NOTE: Care should be observed in cleaning and in removing residues of the cleaning medium. Attempting to braze a contaminated or improperly cleaned surface will result in an unsatisfactory joint. Silver brazing alloys will not flow over or bond to oxides. Oily or greasy surfaces repel fluxes, leaving bare spots which oxidize and result in voids and inclusions.

THREADING

  Grid, dirt or any foreign matter accumulated in the pipe can hinder efficient valve operation and seriously damage vital valve parts. Thoroughly clean pipe internally with air or steam.
When threading pipe, gauge pipe threads for size and length to avoid jamming pipe against seat and disc. Thoroughly clean threaded end to remove any harmful steel or iron deposits. For a good joint, use teflon tape or pipe dope. If pipe dope is used, apply sparingly on pipe threads, never on valve threads. Do not allow any pipe dope into valve body in order to avoid damage to disc and seat.
Before installation, check line of flow through valve so that valve will function properly. Close valve completely before installation. Apply wrench to hex next to pipe and guard against possible distortion. After installation of valve, support line; a sagging pipe line can distort the valve and cause failure.

FLANGED

  There are several steps to follow to make sure that a flanged joint will be properly assembled. First clean the joint carefully. Then loosely assemble the joint by putting in the bottom two or three bolts. Then carefully insert the gasket into place. The bottom bolts will help locate gasket and hold it in position. Then insert the rest of the bolts into place and tighten all of the bolts evenly - not in rotation, but by the cross over method to load the bolts evenly and eliminate concentrated stresses. The bolts should be checked for tightness after an appropriate interval of use and retightened if necessary.

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