Working principle of needle valve

Working principle of needle valve

Needle valve: It is an important part of the measuring pipeline system of the instrument. It mainly includes a globe valve and a ball valve. Its function is to open or cut the pipeline path. The needle valve has the advantages of convenient installation and disassembly, tight connection, good fire resistance, explosion-proof and high pressure resistance, and good sealing performance. It is an advanced connection valve in power plants, oil refining, chemical equipment and instrument measurement pipelines. . The needle valve has good sealing performance and long service life. Even if the sealing surface is damaged, it only needs to replace the vulnerable parts to continue to use. When installing the needle valve, the flow direction of the medium should be consistent with the direction of the arrow on the valve body. Manual shut-off valve and ball valve can be installed at any position in the pipeline.

Needle valve is a kind of valve that can be accurately adjusted. It has a wide range of uses. For example, the cutting distance for flame cutting. The knob for adjusting the flame temperature is a needle valve. The instrument needle valve is an important part of the instrument measuring pipeline system. The function of the globe valve and ball valve is to open or cut the pipeline passage. The function of any valve is to cut off the fluid. According to the spool, it can be divided into globe valve, gate valve, plug valve, ball valve, butterfly valve, needle valve, etc. The spool of needle valve is a very sharp cone It seems to be inserted into the valve seat like a needle, hence the name. The needle valve shape can withstand greater pressure than other types of valves and has good sealing performance, so it is generally used for gas or liquid with lower flow rate and higher pressure. The sealing of the medium. The needle valve shape is most suitable for use with the pressure gauge. The general needle valve shapes are made into threaded connections.

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