行业新闻

原文
Pneumatic diaphragm control valve selection according to application requirements Pneumatic control valve membrane from the spool and valve body (including the seat) of two parts, according to different application requirements into Globe valves, angle seat valve and pressure-regulating valve. Globe valves leak a small amount of fluid on a single valve seat formed by the unbalanced thrust force, and therefore the applications that require a small amount of leakage around the valve and pressure small diameter smaller occasions. Through two-seater body with upper and lower valve spool, spool up and down as the fluid acting on the thrust in the opposite direction and generally offset the imbalance in force so small two-seat valve, allowing a greater differential pressure valve before and after. However, two-seat valve body through a complex flow path, the pressure differential conditions, the erosion damage to the body more serious, should not be used for high viscosity, containing suspended particles or fibrous media. In addition, due to processing constraints, and down two spool valve seat is not easy while locked, so the large amount of leakage when closed, especially in the high or low temperature applications to use, due to different coefficients of thermal expansion, more serious leakage. Angle of high-pressure valve body is angled, simple flow path resistance of small, high-speed fluid by erosion is also small, especially for high-pressure differential, high viscosity and particulate matter suspended solids containing fluid, the gas can also be used to handle liquid mixed phase, easy flash vapor corrosion of the occasion, to avoid coking, bonding and clogging, easy cleaning and self-purification.
原文来自：http://www.gemofa.org

是由上海依耐泵阀有限公司提供的阀门新闻，中文译文仅供参考，以下提供站内导航搜索：

中国隔膜阀网隔膜阀产品隔膜阀知识隔膜阀厂商隔膜阀博客隔膜阀行业新闻

译文：
气动薄膜调节阀由阀芯和阀体（包括阀座）两部分组成，按不同的使用要求分为直通单座阀、双座调节阀和压角式调节阀等。直通单座阀泄漏量小，流体对单座阀芯的推力所形成的不平衡力很大，因此适用于要求泄漏量小管径小和阀前后压差较小的场合。直通双座阀阀体内有上下两个阀芯，由于流体作用于上下阀芯的推力方向相反而大致抵消，所以双座阀的不平衡力很小，允许阀前后有较大的压差。但由于直通双座阀阀体内流路复杂，在高压差状况下，对阀体的冲蚀损伤较严重，不宜用于高粘度、含悬浮颗粒或含纤维的介质。此外，由于受加工条件的限制，双座阀上下两个阀芯不易同时关严，所以关闭时泄漏量大，尤其是在高温或低温的场合下使用，因材料的热膨胀系数不同，更易引起严重的泄漏。角式高压阀阀体为直角式，流路简单，阻力小，受高速流体的冲蚀也小，特别适用于高压差、高粘度和含悬浮物颗粒状物质的流体，也可用于处理气液混相、易闪蒸气蚀的场合，可以避免结焦、粘结和堵塞，便于清洁和自净。

更多新闻：