Several problems should be paid attention to in application of fluorine plastic lined anticorrosive CSGO¾º²Â Reasonable selection and application of fluorine plastic lined anti-corrosion CSGO¾º²Â is a problem of concern in engineering. According to the user's experience in field application for many years, the following precautions are put forward for your reference.
Fluorine plastic lined anti-corrosion CSGO¾º²Â has been widely used in the equipment contacting with acid and alkali and other strong corrosive media in petroleum, chemical, pharmaceutical, metallurgy, electric power and other industries. However, according to our users' experience in field application for many years, the selection of fluorine plastic lined anti-corrosion CSGO¾º²Â should deal with the medium temperature, pressure, differential pressure, etc The following precautions are proposed:
1. Medium temperature used for fluorine plastic lined CSGO¾º²Âs: F46 (FEP) is used for all kinds of fluorine plastic lined CSGO¾º²Âs of our company, and the medium temperature used shall not exceed 150 ¡æ (the medium temperature can reach 150 ¡æ for a short time, and the service temperature for a long time shall be controlled within 120 ¡æ). Otherwise, the F46 lining of various parts of the CSGO¾º²Â is easy to soften and deform, resulting in the CSGO¾º²Â unable to close and the leakage is large ¡£ ?
If the medium temperature is below 180 ¡æ for a short time and 150 ¡æ for a long time, another fluoroplastic PFA can be selected. However, the price of PFA lined fluoroplastics is higher than that of F46 lining. ?
2. Do not have negative pressure. The negative pressure in the pipeline should be avoided for the fluorine plastic lined CSGO¾º²Â. If there is negative pressure, the fluorine plastic lining layer in the CSGO¾º²Â cavity will be sucked out (bulged out) and shelled, resulting in the CSGO¾º²Â opening and closing failure.
3. The pressure and differential pressure should be controlled within the allowable range. In particular, the bellows sealed fluorine plastic lining control CSGO¾º²Â, stop CSGO¾º²Â. Because the bellows is made of PTFE material, the pressure and pressure difference are large, which can easily lead to the rupture of bellows. The fluorine plastic lined regulating CSGO¾º²Â with bellows seal can be changed into PTFE packing seal if the service condition pressure and differential pressure are large. ?
4. The medium conditions used for fluorine plastic lined CSGO¾º²Â should not have hard particles, crystals, impurities, etc., so as to avoid abrasion of fluorine plastic lining layer or PTFE bellows of CSGO¾º²Â core and CSGO¾º²Â seat during the operation of opening and closing. For the medium with hard particles, crystals and impurities, the CSGO¾º²Â core and CSGO¾º²Â seat can be replaced with Hastelloy.
5. The CSGO¾º²Â diameter should be selected correctly according to the required flow (CV value). In the selection, the CSGO¾º²Â diameter and CSGO¾º²Â opening degree should be calculated according to the required flow (CV value) and other technical parameters. If the CSGO¾º²Â diameter is too large, it is bound to make the CSGO¾º²Â operate under the condition of small opening degree for a long time, plus the pressure of the medium, so that the CSGO¾º²Â core and rod are easily impacted by the medium, causing the CSGO¾º²Â to vibrate, and the CSGO¾º²Â core rod will be in the medium for a long time Under the impact of, even make the CSGO¾º²Â stem fracture. ?
When choosing various fluorine plastic lined CSGO¾º²Âs, users should try their best to understand and master the technical conditions, so as to select and use them well and improve the service life of the CSGO¾º²Âs. In case of joint use of the technology, the company shall propose corresponding countermeasures.