needle valve

Needle valve: It is an important part of the instrument measurement pipeline system. It mainly includes stop valves and ball valves. Its function is to open or cut off the pipeline passage. The needle valve has the advantages of easy installation and disassembly, tight connection, good fire protection, explosion-proof and pressure resistance, and good sealing performance. It is an advanced connection valve in power stations, oil refining, chemical equipment and instrument measurement pipelines. The needle valve has good sealing and long service life. Even if the sealing surface is damaged, only the wearing parts need to be replaced and it can continue to be used. 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 stop valves and ball valves can be installed at any position in the pipeline. The needle valve is a kind of valve that can be accurately adjusted and has a wide range of uses, such as the cutting distance for flame cutting. The knob for adjusting the flame temperature is the needle valve. The instrument needle valve is an important part of the instrument measurement pipeline system. It mainly includes stop valves and ball valves. Its function is to open or cut off the pipeline passage. The function of any valve is to cut off the fluid. According to the different valve cores, it can be divided into globe valves, gate valves, plug valves, ball valves, butterfly valves, needle valves, etc. The valve core of the needle valve is a very pointed cone, which is inserted into the valve seat like a needle, hence its 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 sealing gas or liquid media with smaller flow rates and higher pressures. The needle valve shape is most suitable for use in conjunction with a pressure gauge. General needle valve shapes are made into threaded connections.

Personally, I think that in addition to being used in instruments, needle valves can also be used in other aspects, such as sampling valves, etc. Instrument needle valves are one use of needle valves.

Needle valve is a type of instrument valve. Instrument valve is a general term. Those valves connected to instruments are called instrument valves. They generally refer to valves with interfaces below 2". There are more needle valves and ball valves. According to structure, needle valve is a type of stop valve. Their sealing principles are the same, but their internal structures and design concepts are slightly different.