Experience of needle valve

Needle valve is a type of valve, because its round core is like the tip of a needle, so it is called needle valve. Its characteristic is to be able to adjust freely, generally all the valves are used to do blocking function, such as for water, oil, steam, etc. The use is very extensive, for example, in the welding work needs the needle valve to control the flame after heating, if the control is not good, it is easy to have problems such as welding is not firm, or desoldering.
Needle valve pressure is much greater than other valves, in addition, when choosing to use needle valve, we must consider several situations: the needle valve is installed in the use position, whether its pressure is appropriate, whether it can withstand high temperature when selecting materials, if it is used on the head of welding gun for welding, it must be resistant to high temperature.
In addition, its corrosion resistance should meet the standard. In the pipeline with gas, stainless steel, carbon steel and other extremely anti-corrosion materials should be adopted as far as possible to ensure safety. When the degree of corrosion is not too serious, when the temperature and pressure are not too large, the needle valve of non-metallic material can also be selected. For example, when the pipeline is filled with water, plastic materials can be used instead of stainless steel. Not only considering the hidden danger of appearance, but also protecting the outside. You can paint some pigment or paint as a new protective layer.
In determining the use of needle valve installation, to consider its appearance in your use is convenient, beautiful, the position is accurate, whether the installation is firm, these will affect the use of needle valve quality and effect, there is the most important installation to check whether it has sealing, such as improper sealing will also cause safety hazards and economic losses.
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