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Stainless Ball Valve During the production process, it is very easy to contact with other metal iron products. In order to keep stainless steel valves from rusting, the simple method is to follow the following process.

1. After the rough product is finished, after pickling, it needs to be flushed clean. If there are sand holes or perforations, it should be gas-shielded by argon arc welding. Then polish it and then perform solid solution treatment;

2. After the finished product is processed and pressure tested. It should be flushed with water with anti-rust powder.

3. Try to use wooden boxes for packaging during transportation and do not touch metal products.

4. After installing the pipeline, regularly protect and maintain it, such as applying lubricating oil to the valve stem frequently. Open and close the valve several times appropriately. Make the inner ball, valve stem, and sealing surface not easy to assimilate.

Stainless steel ball valves generally have two structures: reduced diameter and non-reduced diameter channel. Regardless of the structure, the flow resistance coefficient of the ball valve is relatively small.

In particular, the so-called full-flow type, that is, the ball valve without diameter reduction, has a passage diameter equal to the inner diameter of the pipeline, and the partial resistance loss is only the friction resistance of the pipeline of equal length, that is, among all valves, this ball valve has the smallest flow resistance. In rocket launch and its experimental system, the smaller the resistance of the transport pipeline, the better. There are two ways to reduce the resistance of the pipeline system: one is to reduce the flow rate of the fluid, so it is necessary to increase the pipe diameter and valve diameter, which often has an adverse effect on the economy of the pipeline system, especially for the cryogenic transport system (liquid hydrogen).