译文：
隔膜阀由耐腐蚀的隔膜和内衬耐腐蚀材质的阀体组成，适用于强酸、强碱、强腐蚀性流体的切断控制或节流控制。隔膜阀的流路有堰式和直通式两种，堰式隔膜阀的阀体流路中有一个堰，当隔膜压紧到堰时，流体被阻断。直通式隔膜阀的阀体内是直通的，通过隔膜下移压紧阀体来阻断流体，由于阀体直通，因此阻断流体和密封能力不如堰式隔膜阀。受隔膜和衬里材质的影响，隔膜阀不能用于高温和高压等工况。一般工作压力不大于1．6MPa，工作温度不大于150℃。隔膜阀用隔膜将流体密封，因此，不需要填料，降低了死区限，避免了泄漏。但因隔膜的材质特性，它的复现性不高，有较大回差。它的流量特性近似为快开特性，即在60％行程内呈现线性特性，超过60％行程后，流量变化很小。 常用的隔膜材料是橡胶和聚四氟乙烯等。 由于隔膜阀的流量特性(近似快开)差，控制精度低，可调范围小，因此，国外已较少采用。随着耐腐蚀材料研究的深入，国外多数应用场合采用耐腐蚀材料做成阀芯、阀座和阀牛来改善控制阀的动态性能，并使流量特性满足控制要求。 隔膜阀的流动阻力小，结构简单，被控介质不会外泄，流通能力约是同样通径直通控制阀的1．5倍，价格比耐腐蚀材料制造的控制阀要低，因此，国内仍有一定市场。

“Type of control valve - Go Diaphragm Valves ”是由提供的国际阀门新闻，译文仅供参考。另外，中国隔膜阀网还提供相关产品搜索：、、、、等。

原文：
Diaphragm Valves from the corrosion resistance of the diaphragm and the lining of the body composition of corrosion-resistant material suitable for acid, alkali, strong corrosive fluid cut-off control or throttling control. Diaphragm Valve flow weir road type and straight through two kinds of weir-style diaphragm valves of the valve flow path, there is a weir, when the diaphragm pressed into the weir, the fluid is blocked. Straight-through diaphragm valves of the valve body is straight, and pressed down through the diaphragm valve to block fluid, due to valve through, so fluid and sealing ability than blocking weir type diaphragm valves. By the diaphragm and the lining material impact, diaphragm can not be used such as high temperature and high pressure conditions. Normal working pressure of not more than 1.6MPa, working temperature is not greater than 150 ℃. Diaphragm Valves with diaphragms to fluid sealing, therefore, do not need to fill, reducing the dead zone limit, to avoid leakage. But membrane material properties, and its reproducibility is not high, there is a larger backlash. It is similar to the flow characteristics of the fast opening characteristics, that is within 60% of stroke showed a linear characteristic, more than 60% of the stroke, the flow changes very little. Commonly used membrane materials such as rubber and PTFE. As the diaphragm valves of the flow characteristics (similar to Quick-open) poor control precision is low, adjustable range of small, therefore, has less foreign adoption. With the in-depth study of corrosion-resistant materials, the majority of foreign applications made use of corrosion-resistant materials, valve core, valve seat and valve cattle to improve the dynamic performance of control valves, flow characteristics and to satisfy the control requirements. Diaphragm Valves of the flow resistance is small, simple structure, is not accused of media leaks, flow capacity is about the same straight-pass-pass control valve 1.5 times the price of corrosion-resistant material than that of the control valve is lower, therefore, the domestic is still have a certain market.