Fluorinated pesticide intermediate

Expert analysis, fluorine-containing fine chemicals mainly include fluorine-containing intermediates, fluorine-containing medicines, fluorine-containing pesticides, and fluorosurfactants. At present, there are more than a dozen types of aromatic fluorides developed and nearly 1,000 varieties. Most of these fluorides are industrially produced in Europe, the United States, and Japan. In China, only fluorobenzenes, trifluorotoluenes, chlorofluorobenzenes, and fluoroaniline compounds are produced in batches. At the same time, more than half of China's fluorine-containing intermediates are exported. Therefore, it is extremely urgent for China to vigorously develop fluorine-containing fine chemicals.

At present, only a few fluorine-containing fine chemicals in China can be produced in batches, and at the same time, more than half of the fluorine-containing intermediates are exported. For pesticide intermediates, it is necessary to focus on the development of pesticide intermediates that cannot be produced domestically, such as dibromoinulin, DV chrysanthemic acid, catechol and o-cresol; it is important to develop fluorine-containing pesticide intermediates such as insecticides. Intermediates such as urea, hexaflumuron, ruthenium, quizalofop, etc. At the same time, it is important to develop high-toxic pesticide substitute products, heterocyclic-containing pesticides and chiral pesticide intermediates. (China Pesticide Information Network)

Piston Seals

Piston seal is a kind of seal used to seal between piston and cylinder, usually used in hydraulic system and Pressure system. The piston seal can prevent liquid and gas leakage, and also prevent external impurities from entering the system, thus maintaining the normal operation of the system.

Piston seals can be classified based on their structure and material. According to different structures, piston seals can be divided into unidirectional seals and bidirectional seals. A unidirectional seal can only prevent the leakage of liquid or gas from one direction, while a bidirectional seal can prevent the leakage of liquid or gas from both directions. According to different materials, piston seals can be divided into rubber seals, polyurethane seals, polytetrafluoroethylene seals, etc.

In hydraulic systems, piston seals are typically used to seal hydraulic cylinders and pumps. The piston seals in hydraulic systems need to have characteristics such as high temperature resistance, corrosion resistance, and wear resistance to ensure long-term stable operation of the system. In Pressure system, piston seals are usually used to seal cylinders and pumps. The piston seals in the Pressure system need to be resistant to high pressure, low temperature, wear and other characteristics to ensure the normal operation of the system.

In addition to hydraulic system and Pressure system, piston seals can also be used in other industrial fields, such as automobile, aviation, machinery, etc. In the automotive industry, piston seals are commonly used in engines to ensure normal engine operation. In the aviation industry, piston seals are commonly used in the hydraulic system of aircraft to ensure normal takeoff, landing, and flight. In the field of machinery, piston seals are commonly used in hydraulic and press machines to ensure the normal operation of the machine.

In short, piston seals are a very important type of seal that is widely used in various industrial fields. With the continuous development of industrial technology, the materials, structure, and performance of piston seals are also constantly improving and upgrading to meet the needs of different fields.

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DG Zhongxingshun Sealing Products Factory , https://www.zxs-seal.com