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Question:

What are the structural differences between parallel and wedge valves?

What are the structural differences between parallel and wedge valves?

Answer:

The structure of globe valve and gate valve. What does this article introduce first?What is parallel gate valve?The sealing cover is parallel to the vertical center line, so the sealing surfaces of the valve body and the gate are parallel to each other. This gate valve is the most common double gate plate, in order to shut down, so that the valve and gate two sealing surface contact closely asked, often used in two ram double sided thrust wedge block. Thus, when the valve is closed, the double side thrust block is contacted with the bottom of the valve body and is gradually stressed.
The double gate is pushed aside so that the sealing surface of the valve gate is tightly sealed with the valve body. These double gate parallel gates are mostly used on low pressure pipelines such as small pipelines. Parallel gate valves are also available with single gates, but are rare.That the sealing surface has a certain angle with the vertical center line, bearing higher medium temperature valve, angle the greater the possibility to reduce the temperature when wedged gate rice.Wedge gate valve single, double all.
The advantages of dual gate plate is sealed and angle precision low temperature is not easy to make the wedge gate, the abrasion of the sealing surface and shim.The disadvantage is that the structure is complex, easy to stick in the dry medium, mainly the upper and lower baffles. After years of corrosion, the gate is easy to fall off. Although the single gate is sealed and angle accuracy requirements are relatively high, difficult processing and temperature change may make the gate wedge and other shortcomings, but has the advantages of simple structure, reliable use, especially to the flexible gate, can produce the micro elastic deformation to compensate for the deviation between the sealing surface angle processing, which is widely used at present.For more information about valves, please keep an eye on the valve knowledge section.

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