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原文:
The corrosion-resistant lining diaphragm valve and corrosion resistance diaphragm valve assembly instead of using, regulate the movement of the diaphragm. Diaphragm valve body materials made of cast iron, cast steel, or cast stainless steel, and lined with a variety of corrosion or abrasion resistant materials, rubber and PTFE membrane material. Corrosion resistant lining of the diaphragm, regulation suitable for acid, alkali and other strong corrosive media. Other types of valve diaphragm valve of simple structure, small fluid resistance, flow capacity than the same specification; no leakage, can be used to adjust the high viscosity and suspended particles in the medium. Diaphragm to the media and the stem cavity isolation, so there is no packing medium does not leak. However, due to the diaphragm and the lining material limit, pressure resistance, temperature resistance is poor, generally applies only to 1.6MPa nominal pressure and 150 ℃. The flow characteristics of the diaphragm close to the features quick, in 60% of stroke is approximately linear, 60% of the traffic changes. Pneumatic diaphragm valve can still be attached to the form of feedback signal, limiting device and a positioning device, in order to meet the needs of automatic control, control or regulate the flow. Non contact sensing technology pneumatic diaphragm valve feedback signal. This product uses the film propulsion cylinder, replace the piston cylinder, ruled out the piston rings are easily damaged, resulting in leakage caused by the drawbacks that can not push the valve opening and closing. When the gas supply failure, can open and close the valve handwheel.隔膜阀的组成及工作特点介绍。
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译文:
隔膜阀用耐腐蚀衬里的阀体和耐腐蚀隔膜代替阀芯组件,利用隔膜的移动起调节作用。隔膜阀的阀体材料采用铸铁、铸钢,或铸造不锈钢,并 衬以各种耐腐蚀或耐磨材料、隔膜材料橡胶及聚四氟乙烯。衬里的隔膜耐腐蚀性能强,适用于强酸、强碱等强腐蚀性介质的调节。       隔膜阀的结构简单、流体阻力小、流通能力较同规格的其他类型阀大;无泄漏,能用于高粘度及有悬浮颗粒介质的调节。隔膜把介质与阀杆 上腔隔离,所以没有填料介质也不会外漏。但是,由于隔膜和衬里材料的限制,耐压性、耐温性较差,一般只适用于1.6MPa公称压力和150℃ 以下。     隔膜阀的流量特性接近快开特性,在60%行程前近似为线性,60%后的流量变化不大。气动形式的隔膜阀尚可附装反馈信号、 限位器及定位器等装置,以适应自控、程控或调节流量的需要。气动隔膜阀的反馈信号采用无触点传感技术。该产品采用薄膜式推进气缸,替 代活塞气缸,排除了活塞环易损坏,造成泄漏而导致无法推动阀门启闭的弊端。当气源发生故障时,尚可操作手轮使阀门启闭。隔膜阀的组成 及工作特点介绍。