Several problems that should be paid attention to in the use of fluorine plastic anticorrosive valve are briefly introduced

Several problems that should be paid attention to in the use of fluorine plastic anticorrosive valve are briefly introduced

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At present, there are many applications of thermostatic radiator valve at home and abroad, and some energy saving effect and experience have been obtained. Domestic manufacturers produce radiator thermostatic valve, in the leakage prevention, temperature sensing medium sealing, resistance presetting function, reliability and other aspects are still lacking; Foreign products in terms of price and how the products fit the Chinese system is still lacking, this article * for reference.
Radiator thermostatic valve
Radiator thermostatic valve is an automatic control valve installed on the radiator. It can ensure a stable and comfortable room temperature. The control element is a temperature package filled with temperature sensing material. When the room temperature rises, the temperature package will expand to close the valve and reduce the hot water supply to the radiator. Thermostatic valve can also adjust the set temperature, thermostatic valve will automatically control and adjust the hot water supply of the radiator according to the set requirements.
At present, there are many applications of thermostatic radiator valve at home and abroad, and some energy saving effect and experience have been obtained. Domestic manufacturers produce radiator thermostatic valve, in the leakage prevention, temperature sensing medium sealing, resistance presetting function, reliability and other aspects are still lacking; Foreign products are still lacking in terms of price and how they fit into the Chinese system.
In the current construction installation of radiator thermostatic valve, the temperature of vertical imbalance can generally be resolved, indoor temperature control system can run properly and implementation, but due to the charged according to heat has not really implemented, users do not have enough energy saving consciousness to take the initiative to adjust the set temperature, even is usually to set the valve at the highest point of temperature, Therefore, for the application of heat sink thermostatic valve can save energy, dynamic adjustment for the external network impact is still lack of practical effect, how to match and control the system, and the design scheme is not mature enough.
Balancing valve
Balance VALVE HAS BEEN DEVELOPED AND USED IN OUR COUNTRY FOR A LONG TIME, SIMPLY, BALANCE VALVE IS A ADJUSTING-VALVE THAT CAN MEASURE FLOW RATE. In the serious situation of hydraulic dissonance in China, balance valve has great energy saving effect and promotion value. For the dynamic adjustment system of temperature control and measurement, the balance valve is a key equipment to adjust the balance and stability of the system, so as to control the equipment to play its due role.
Several problems should be paid attention to in the use of fluorine lined plastic anticorrosive valve fluorine lined plastic anticorrosive valve in petroleum, chemical, pharmaceutical, metallurgy, electric power and other industries contact acid and alkali and other strong corrosive media device has been a popular application, according to many years of application experience, The following precautions should be put forward for the use conditions of the medium temperature, pressure, pressure difference and so on :1. The medium temperature of the fluorine plastic valve: the fluorine plastic valve has temperature requirements in the use process, such as the medium temperature of the valve lined with F46 can not exceed 150℃ (medium temperature is short)
Fluorine lined plastic anti-corrosion valve in petroleum, chemical industry, medicine, metallurgy, electric power and other industries have been the best application of acid and alkali and other strong corrosive medium devices, according to the application of experience over the years, the choice of fluorine lined plastic anti-corrosion valve should be the medium temperature, pressure, pressure difference and other conditions put forward the following precautions:
1, lined with fluorine plastic valve medium temperature: lined with fluorine plastic valve in the process of use has temperature requirements, such as lining F46 valve medium temperature can not exceed 150℃ (medium temperature can be 150℃ for a short time, long time use temperature should be controlled in 120℃), otherwise, the valve components lining F46 easy to soften, deformation, The valve can not be closed, large leakage.
If the temperature of the medium used is below 180℃ for a short time and below 150℃ for a long time, PFA can be selected, but the price of fluorine plastic lined with PFA is more expensive.
2. There should be no negative pressure. Fluorine lined plastic valve should avoid the use of negative pressure in the pipeline, if there is negative pressure, easy to cause the fluorine lined plastic layer in the valve cavity is sucked out (drum out), peeling, leading to valve opening and closing failure.
3, the pressure, pressure difference should be controlled in the permissible range. Especially bellows seal lined fluorine plastic regulating valve, globe valve. Because the bellows are made of tetrafluoric materials, the pressure and pressure difference are large, which can easily lead to the rupture of the bellows.
Bellows seal lined fluorine plastic regulating valve, the use of condition pressure, pressure difference is large, can be changed to PTFE packing seal.
4. The medium condition of fluorine lined plastic valve should not have hard particles, crystals, impurities, etc., so as not to wear out the valve core and valve seat lined fluorine plastic layer or PTFE bellows in the operation of opening and closing. The medium has hard particles, crystals, impurities, selection, spool, seat can be used to Hastelloy.
5, lined with fluorine plastic regulating valve should be according to the required flow (Cv value) correct selection of valve diameter size. When choose, should according to the need of traffic (Cv) and other technical parameters are calculated the valve size should be chosen and the opening of the valve, such as valve’s size too big, certainly will makes the valve in the opening for a long time running, under the condition of rather smaller and medium pressure, so easy to make the valve core and valve rod by the impact of the media and make the valve vibrates, The valve core rod in the medium for a long time under the impact, even will make the valve stem fracture.
Users in the selection of all kinds of fluorine lined plastic valves, should be as far as possible to understand, master the use of technical conditions, in order to select, use well, improve the service life of the valve. When it is beyond the scope of technical conditions, it should be proposed to the manufacturer, and the corresponding countermeasures should be taken to solve the problem through joint consultation.


Post time: Aug-08-2022

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