The electric butterfly valve is filled with inert gas, and the product with elastic function is produced through the piston. The product works without external power, without disorderly lifting force, and can stretch freely (the lockable air butterfly valve can be positioned arbitrarily). It is widely used, but the following points should be noted during installation:
1. The air butterfly valve is a high-pressure product, which is strictly and randomly analyzed, baked and bumped.
2. The piston rod of the air butterfly valve rotates tightly to the left. If the valve direction needs to be adjusted, it can only be rolled to the right.
3. Operating ambient temperature: - 35 ℃ -+70 ℃. (. Custom made 80 ℃)
4. When installing the connection point, it should roll flexibly without jamming.
5. The selected size should be reasonable, the force size should be appropriate, and the stroke size of the piston rod should have an 8mm margin. Butterfly valve is the general name of valve block, which is a kind of high elastic body made of common materials. The composite butterfly valve is composed of the metal spiral butterfly valve and the high-quality vulcanization wrapped outside.
In terms of anti-corrosion of butterfly valves, the electroplating metal protection method was introduced before. The electroplating metal coating anti-corrosion protection method not only protects the butterfly valve from corrosion, but also can enhance the appearance of the butterfly valve to a certain extent, and also strengthen the working performance of the butterfly valve on a certain basis, improve the hardness and stability of the butterfly valve, Therefore, the method of metal protective layer is often used on the anti-corrosion layer of butterfly valve.
The anti-corrosion method of butterfly valve is that the chemical property of metal zinc in the air is stable and does not change, and the dense zinc oxide film is formed in the humid air to carry out the anti-corrosion of butterfly valve. If there are many corrosives in the air, the butterfly valve should be passivated to increase its protection ability and aesthetic level.
In fact, the anti-corrosion of butterfly valves can not only rely on metal zinc for coating anti-corrosion protection, but also through a variety of metals, so we should set the metal selection of anti-corrosion metal protective layer according to the site environment where the butterfly valves should be produced.