Key introduction to the selection of German FESTO solenoid valve

The key to choosing the German FESTO solenoid valve is the dynamic characteristics of the valve.

 The dynamic nature of the so-called German FESTO solenoid valve is the key to selecting a grooved valve: although some traditional factors are still important, they only focus on the "static" performance of the valve. In fact, they are the result of measuring the valve on the "workbench", but such a result is difficult to explain what kind of performance the German FESTO solenoid valve will exhibit under actual operating conditions. Traditional theory suggests that careful adjustment of static factors will result in good performance of the valve (and thus the entire circuit). but it is not the truth.

The German FESTO solenoid valve metal material is damaged under the action of chemical or electrochemical environment. Since corrosion occurs in the spontaneous interaction between the metal and the surrounding environment, how to isolate the metal from the surrounding environment or use more non-metallic synthetic materials has become a common concern.

  It is well known that corrosion damage of metals has a considerable influence on the duration of action, reliability and service life of the valve. The action of mechanical and corrosive factors on the metal greatly increases the total amount of wear on the contact surface. The total amount of wear on the surface of the friction during operation of the valve. During the operation of the German FESTO solenoid valve, the friction surface is subject to wear and damage as a result of simultaneous mechanical action and chemical or electrochemical interaction between the metal and the environment. For valves, the climatic conditions of the pipeline work are complex; the presence of hydrogen sulfide, carbon dioxide and some organic acids in media such as oil, natural gas and oil layer water increases the destructive force of the metal surface and thus quickly loses working ability.

  The chemical corrosion of metals depends on the temperature, the mechanical load of the friction parts, the stability of the sulfides contained in the lubricant and its acid resistance, the duration of contact with the medium and the catalysis of the metal on the nitriding process, corrosion and corrosion. The rate at which a molecule's molecules switch to metal, and so on. Therefore, the anti-corrosion method (or measure) of metal valves and the application of synthetic material valves have become one of the themes of current valve industry research.

1. The anti-corrosion of metal German FESTO solenoid valve can be understood as coating the metal valve to protect it from corrosion (such as paint, pigment, lubricating material, etc.), so that the valve is manufactured, stored, Transport is also not subject to corrosion throughout the process of its use. The method of metal German FESTO solenoid valve anti-corrosion is determined by the required protection period, transportation and storage conditions, valve construction characteristics and materials, of course, to adapt to the economic effect of anti-corrosion. There are four main methods for preserving metal valves and their components:

1. Place the volatile corrosion inhibitor in the atmosphere of the steam (wrapped with resist paper, blown to inhibit air from passing through the product chamber, etc.).
2. Use blocked water and alcohol solutions.
3. Apply a thin layer of anti-corrosion (protective) material to the surface of the valve and its components.
4. Apply a thin layer of resisted film or polymer to the surface of the valve and its components. (Note: At present, valve manufacturers widely use lubricating materials and water resistance to dissolve the liquid to prevent corrosion.)

Second, the application of materials Germany FESTO solenoid valve

  Synthetic materials German FESTO solenoid valve is superior to metal valve in many corrosive conditions, first of all, corrosion resistance, followed by net weight. As for its strength, it depends on the shape, arrangement and quantity of reinforcing fibers. (In general, the greater the percentage of fiber, the greater the strength of the composite.) In valve applications, the weight of the fiber is generally in the range of 30% to 40%, and its chemical stability is mainly encapsulated in the final product. The resin's bulk properties are determined by the fiber. In synthetic valve, the solid polymer body can be either thermoplastic (such as PVC-polyvinylidene fluoride, PPS-polyphenylene sulfide, etc.) or thermosetting resin (such as polyester, ethylene and epoxy resin). Wait). The thermosetting resin retains its strength at a dielectric temperature better than a thermoplastic (ie, the thermosetting resin has a higher heat distortion temperature). (Note: In the operating conditions, the measurement of the thermal resistance of synthetic materials is called the heat distortion temperature.)