After long-term use, the bellows gate valve will leak. So how to prevent this imagination? This should be dealt with according to the leakage of the bellows gate valve. Generally, the leakage of the bellows gate valve can be divided into the following two types: one is internal leakage and the other is external leakage.

leak. So how to resolve these two situations?

The leakage of stainless steel bellows gate valve is generally divided into internal leakage and external leakage. There are many reasons for leakage. Endocrinology is generally due to the failure of the sealing surface caused by solid impurities in the liquid medium. Combined with the analysis of the on-site use situation, the reason for the leakage of the valve stem is mainly related to the valve structure, working environment and operation mode.



Structure The valve stem adopts a double sealing structure of bellows and packing. Electric ball valve. The bellows is welded with the inner lining ring and the outer lining ring to form a bellows assembly, and then welded with the valve stem and the guide body to block the leakage of the medium through the valve stem. . The moving distance of the valve stem up and down, the flat key moves upward until it is flat.

The upper end surface of the key is in contact with the lower end surface of the lower filler. Since the lower packing is made of PTFE material, if the valve is opened too much, the flat key will be embedded in the packing, the valve can no longer be opened and closed, and the bellows assembly will be knocked to death, causing the medium to leak along the valve stem. Stretching of bellows

The length and compression are determined according to the stroke of the valve. If the limit is stretched or compressed, the bellows may be damaged, causing the small pipe to rupture, seal failure, and flat plate.