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原文:
隔膜阀是最早的调节阀之一,它有如下使用特点:
   (1)软的橡胶隔膜阀能切断介质做到不漏。
   (2)因橡胶有一定的耐蚀性,在60年代前,还没有更好的耐腐蚀材质,它通常又被当作耐腐蚀材料来推广应用,甚至还延续到今天。
   (3)流路简单,有“自洁”作用,可用于不干净介质。
   (4)开特性,但作为耐腐蚀调节阀用时,只好用快开特性的前部分,其有效行程短,调节品质差。
   (5)尤如一个疲劳试验件,强迫它上下折叠,容易破坏,因为隔膜是一个不可靠的零件,导致阀寿命较短,这是致命缺点。正由于此,作 者近几年都在强调:应该淘汰隔膜阀,用球阀、全功能超轻型阀取而代之。
   (6)关闭时,介质作用力把膜片往上顶,不平衡力较大,需要较大的执行机构推力,因此,必须选用特别大的又笨又重的执行机构,使阀 重量变得非常笨重,是球阀的2倍,是全功能超轻型阀的3—4倍。
   (7)尤其需要强调的是:耐腐蚀材质越来越多,尤其是80年代末衬氟塑料工艺得以解决,衬氟球阀问世。由于氟塑料比橡胶耐腐蚀、耐温 ,而球阀的球芯又远比隔膜阀隔膜的刚度强十倍百倍,所以建议在腐蚀介质的切断和调节场合,尽量不选用隔膜阀,选用耐腐蚀衬氟球阀、 蝶阀和全四氟单座阀。不妨举一个例子说明:在水处理系统中,脱盐水装置上使用的阀,10年前,无论是国外还是国内装置,都选用了衬氟 塑料的隔膜阀,其使用寿命长则一年左右,短则3~6个月,因此,不断地在更换隔膜。后选用我们推荐的水处理专用球阀后,此问题被很好 地解决了,寿命长达7~8年,一般也能用到3~5年。

更多隔膜阀产品,请登录 http://www.gemofa.org 中国隔膜阀网 ,我们将竭诚为您服务。隔 膜阀的使用及其特点。
以下是参考译文:

译文:
Diaphragm valve is one of the first control valve, it has the following characteristics:
(1) soft rubber diaphragm to cut off the media do not leak.
(2) the rubber have a certain corrosion resistance, in the 60 years before, there is no better corrosion-resistant materials, as it usually has been to promote the application of corrosion resistant material, and even until today.
(3) the flow path is simple, the "self-cleaning" effect, can be used for the medium is not clean.
(4) opening characteristic, but as a corrosion control valve, but with the first part of the features quick, effective stroke is short, poor quality regulation.
(5) such as a fatigue test pieces, forcing it to fold down, easy to destroy, because the diaphragm is an unreliable parts, resulting in a shorter valve life, this is a fatal drawback. Because of this, the authors have emphasized in recent years: should be eliminated diaphragm valves, ball valve, replace sb. full-featured ultra light valve.
(6) is closed, the media force the diaphragm up top, unbalanced force, require larger actuator thrust, therefore, must use the actuator particularly big stupid and heavy, the weight of the valve becomes very heavy, is 2 times the valve, is 3 - 4 times the full-featured ultra light valve the.
(7) especially need to be emphasized: more and more corrosion-resistant materials, especially the late 80's fluorine plastic process is resolved, the advent of lined ball valve. Fluorine plastic than rubber corrosion resistance, temperature, and the ball valve core and far more than the rigidity of the diaphragm valve diaphragm ten times, so that the cut in corrosive media and adjust the occasion, try not to use diaphragm valve, selection of corrosion-resistant fluorine ball valve, butterfly valve and PTFE single seat valve. Cite an example: in the water treatment system, desalination of water using the valve device, 10 years ago, both foreign and domestic 隔膜阀的使用及其特点。

原文标题:“隔膜阀的使用及其特点”

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