In the production process, the stainless steel ball valve is extremely simple to touch with other metal and iron products. In order to keep the stainless steel valve from rusting, the simple method is to follow the procedure below.

1. After the finished product, after pickling, it needs to be washed clean. If there are sand holes or perforations, argon arc welding should be used for gas shielded welding. Then it is polished and then solid-melted;
2. The finished product will be processed and the pressure test will be completed in the future. It should be washed with water that participates in anti-rust powder.
3. Try to use wooden boxes for packaging during transportation and do not touch metal products.
4. In the future, the installation pipeline shall be protected and maintained regularly, for example, the valve stem shall be frequently coated with lubricating oil. Properly open and close the valve several times. It is difficult to assimilate the inner ball, valve stem and sealing surface.

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

Especially the so-called full-flow type, that is, the ball valve that does not reduce the diameter, because its channel diameter is equal to the pipe inner diameter, part of the resistance loss is only the friction resistance of the equal length pipe, that is, in all valves, the flow resistance Z of this ball valve is small. In the 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 fluid flow rate. For this reason, it is necessary to increase the pipe diameter and valve diameter, which will often have an unfavorable impact on the economics of the pipeline system, especially for the low-temperature transportation system ( Liquid hydrogen) is extremely unlucky.