The bellows gate valve has a very important attribute, that is, the leakproofness of the bellows gate valve. Let's take a look at the leakproofness of the bellows gate valve! For many industries, the leakproofness of the bellows globe valve is very important, so how do we ensure its leakproofness during use?

As far as the gate valve structure is concerned, the valve can be opened or cut off through the principle of both rotation and lifting of the valve stem, and the sealing and upper sealing functions of the valve can be ensured. Due to the special movement principle of the structure, the upper seal of the valve is often opened and closed only a few times, which is caused by the scratch between the sealing pairs. The minor scratches need to be disassembled for repair, while the severe scratches need to be scrapped due to damage. Therefore, to ensure the sealing performance, we need to improve it. The main methods are as follows:

1. Change the material of upper sealing pair. Stellite cemented carbide with good scratch resistance is welded on the sealing cone surface of the valve stem, but the cost of Stellite cemented carbide is high, and the bonding process is complex. But the effect is very obvious.

2. Move the upper sealing part of the valve stem to the valve disc. Although the improvement can improve the service life of the upper seal, the structure is more complex due to the need to add a seal between the disc cover and the disc, and the performance price is not particularly high.

Therefore, the sealing of the bellows gate valve is very important, and only in this way can the function of the bellows gate valve in production be guaranteed.