Today, I will introduce the application of ultra-high pressure needle valve in various occasions: ultra-high pressure needle valve is an important part of the instrument measuring pipe system, mainly including globe valve
and ball valve
. That function is used to open or cut pipe channels. The valve core of the needle valve is a pointed cone that is inserted into the valve seat like a needle, hence the name. The needle valve is easy to install, easy to connect, and has the advantages of high fire resistance, explosion-proof and pressure resistance, and good sealing performance. The needle valve has good sealing performance and long service life. Even if the sealing surface is damaged, it can continue to be used as long as the vulnerable parts are replaced. Selection method of ultra-high pressure needle valve: 1. In the pipeline system and device of low temperature medium, low temperature needle valve with valve cover should be selected. 2. On the pipeline system of the catalytic cracking unit of the oil refining unit, a lifting rod needle valve can be selected. 3. In the devices and pipeline systems of corrosive media such as acid and alkali in chemical systems, all stainless steel needle valves made of austenitic stainless steel and PTFE as the valve seat sealing ring should be selected. 4. Metal-sealed needle valves can be used in pipeline systems or devices of high temperature medium in metallurgical systems, power systems, petrochemical plants, and urban heating systems. 5. The pipelines and storage equipment of refined oil shall use needle valves connected by welding. 6. On the pipelines of city gas and natural gas, use a needle valve with flange connection and internal thread connection. Precautions for installation of ultra-high pressure needle valve: 1. The installation position, height, and direction of inlet and outlet must meet the design requirements. Note that the direction of medium flow should be consistent with the direction of the arrow marked on the valve body, and the connection should be firm and tight. 2. Visual inspection must be carried out before the valve is installed, and the nameplate of the valve should comply with the current national standards. 3. For the valve whose working pressure is greater than 32.0 MPa and has the function of cutting off the main pipe, the strength and tight performance test should be carried out before installation, and it is allowed to be used after passing the test. 4. During the strength test, the test pressure is 1.5 times the nominal pressure, and the duration is not less than 5min. The valve shell and packing should be qualified without leakage. The ultra-high pressure needle valve is introduced here. If you have any questions in the future, you can also consult Lianke Valve Co.,Ltd. It is a company that mainly produces fluorine-lined valves and various valves. Contact: +86-577-8585 9626 or.
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