Tuesday, August 21, 2012

Introduction to the Stop Valve and Gate Valve

As we all know that the valve industry is in its prosperity and is supposed to develop further. And it is certain that there are various types of specified valves. The stop valve and gate valve is two types of them holding their own specifications. Now, characteristics of these two terms are introduced in the following.
The featured part of the gate valve is the wedge disc which also called as the gate segment. It is used to open or close totally to www.zdvalve.com control the flow as its moving direction is vertical with the flow direction. Commonly, the gate valve is not proper to be used to regulate the flow. And the seal is definitely necessary to ensure the operation, for which many kinds with specified specifications are available. The type of self-sealing refers to that the pressure from the medium is used to achieve the function of sealing. And the other type is the one which requires the external force to shut off the gate segment in order to ensure the good tightness. And in terms of the shapes formed by the two sealing faces, there are rigid gate and flexible gate available.
And it is certain that there exist required standards on many aspects. They aim to make the valve perform safely and effectively to withstand the available temperatures and pressures. And there are many applicable driving modes, such as the manual mode, bevel gear mode and such others. Similarly, many kinds of media can be controlled by the gate valve. Generally speaking, the gate valve is popular either in the industrial process or in the daily life. There are some appreciated advantages of this term, such as the fluid resistance, convenient opening and closing, unrestricted flow of medium, simple structure, good manufacturing process and wide range of the applications.
For the stop valve, it is proper for regulating the flow resulting from its specified structure and operating mode. The stop valve refers to the valve whose disc moves along the centerline of the valve seat. What else, due to the short distance within the affecting valve stem, the stop valve is able to cut off if it is necessary. Thus, it seems to be more popular than the gate valve not only because of the wider applications but also because of the better wear-resistance and easier maintenance. There is no doubt that it holds its own standards which should be strictly respected. And in terms of pipes which to transport medium with high temperature and pressure, the stop valve rises to be the better choice.

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