Eight advantages of fluorine lined valves in chemical industry

Eight advantages of fluorine lined valves in chemical industry

Traditional valves have the phenomenon of running, emitting, dripping and leaking. Now fluorine lined valves are effective in these aspects. What are the advantages of fluorine lined valves in the chemical industry?

1： The main advantage of PTFE lined valve is corrosion resistance, both acid and alkali, but too high temperature is not good. The phenomenon of running, emitting, dripping and leaking is due to the material or quality of the valve itself.

2： It has corrosion-resistant and aging resistant polyfluoroethylene propylene (F46), so it has reliable corrosion resistance and sealing performance. It is widely used in chemical, petroleum, metallurgy, medicine and other industrial departments to adjust or cut off strong corrosive media such as acid and alkali in the production process. It has the most obvious effect in the control of water treatment process. 3： I have done experiments, domestic fluorine lined valves will leak, but not as good as ordinary valves Therefore, the fluorine lined valve will not solve the dripping problem, but is mainly used for corrosion resistance.

4： Compared with corrosion-resistant metal materials, the price is much cheaper. Fluorine lined valves generally have temperature limits.

5： According to our experience, fluorine lined valves have no other advantages except the typical advantages of corrosion prevention. Of course, there are many disadvantages: it cannot be sealed well, and high vacuum is not good; The temperature is seriously restricted. If the temperature of the reactor is high, there will be swelling consequences.

6： Our company uses a large number of fluorine lined valves, which are more reliable in corrosion resistance than valves such as 316L. The main disadvantage is that we mainly use them at low temperature. The surface of the valve shell will condense due to the low temperature of the medium, resulting in the rusting of the carbon steel shell. In particular, the valve, filler gland and bolt are easy to be corroded, resulting in the leakage of materials from the valve stem filler and the damage of the valve.

7： The main advantage of fluorine lined valves is corrosion resistance. The maximum service temperature should reach about 200 degrees, depending on the temperature pressure curve of the product.

8： The relationship between the running, emitting, dripping and leakage of the valve and the fluorine lining is not very big. The key is to select the correct type of the valve, and the conditions such as temperature, pressure, medium and place of use must be met. Then the quality of the valve must be guaranteed. The fluorine lining valve has been used on the concentrated sulfuric acid pipeline, but soon the valve core leaked, and it was replaced with an ordinary carbon steel stop valve, Inspection.