上海工开阀门:闸阀的通径收缩

来源:闸阀知识 http://www.shgkvc.cn 发布时间:2011-03-08

工开阀门是上海地区专业的阀门生产厂家,主要生产产品有闸阀高压闸阀球阀、截止阀等,工程师皆有数十年专业经验,今天要为大家介绍的是闸阀的通径收缩:

如果一个阀体内的通道直径不一样(往往都是阀座处的通径小于法兰连接处的通径),称为通径收缩。
通径收缩能使零件尺寸缩小,开、闭所需力相应减小,同时可扩大零部件的应用范围。但通径收缩后。流体阻力损失增大。
在某些部门的某些工作条件下(如石油部门的输油管线),不允许采用通径收缩的阀门。这一方面是为了减小管线的阻力损失,另一方面是为了避免通径收缩后给机械清扫管线造成障碍。

Workers in Shanghai to open the valve is a professional valve manufacturer, main products are gate valve, high pressure valve, ball valve, globe valve, engineers Jieyou decades of professional experience, I will introduce today is the gate Path contraction:

If a channel diameter of the valve body is different (and often are the valve seat at the flange diameter is smaller than the diameter), called the path contraction.
Path shrink parts sizes shrink, open and close the required power is reduced, at the same time expand the scope of application components. However, the path contraction. Fluid resistance loss increases.
In some sectors certain operating conditions (such as the petroleum sector, pipeline), not allowed to use the path contraction of the valve. This aspect is to reduce the pipeline pressure loss, the other is to avoid the path contraction obstacle to the mechanical cleaning pipelines.