Stainless steel ball valve before processing steps as well as the maintenance of stainless steel ball valve before assembly and after assembly should be strictly in accordance with the requirements of the steps to complete, this article mainly introduces the stainless steel ball valve parts must go through before the assembly process, specific as follows: 1) According to process requirements, some parts need to do polishing processing, surface can't be machining burrs, etc. ; 2) All parts for degreasing process; 3) After the completion of the stainless steel ball valve degrease pickling passivation ( Detergent containing phosphorus) ; 4) After pickling passivation with pure water is rinsed clean, cannot have pharmaceutical residues ( Carbon steel parts leave out this step) ; 5) Dry individually parts with non-woven fabric, not the cable MAO retained components such as surface, or use a clean dry nitrogen; 6) With non-woven fabric or precision filter analysis of pure alcohol to wipe components one by one, until no dirty color. Stainless steel ball valve installation of other requirements: 1) Fabricated stainless steel ball valve with nitrogen purging at least 1 minute; 2) Air test must be pure nitrogen; 3) Air test qualified junior stuff, with a clean PE cap seal, polyethylene cap before using organic solvent soak, wipe clean; 4) Then use sealed vacuum bag; 5) The final packing; 6) In the process of transportation to take measures to ensure the coating is not damaged. Stainless steel ball valve assembly before and what steps needed to install. Stainless steel ball valve maintenance the operation of the stainless steel ball valve just has to rotate 90 degrees and small rotational torque can be closed tight. Full equality of the valve body cavity for medium resistance is very small, straight flow channel. Ball valve itself is the main characteristics of compact structure, easy operation and maintenance, and is applicable to water, solvent, acid and gas, such as general work medium, but also is suitable for the working conditions of media, such as oxygen, hydrogen peroxide, methane and ethylene. Ball valve body can be a whole, also can be combined. This valve shall generally be installed in the pipeline. Stainless steel ball valve categories: stainless steel pneumatic ball valve, stainless steel electric ball valves, stainless steel ball valve manually. Stainless steel ball valve material is divided into 304316321 stainless steel ball Industrial Valves. Maintenance: stainless steel ball valves in the process of manufacture, very easy to contact with other metal iron products. In order to make the stainless steel valves can never rust, that the easiest way is to do according to the following process. 1, blank after the finished product, after pickling, must want to rinse, if there is a sand hole or perforation, should use the argon arc welding gas shielded welding on it. Solid fusion processing and grinding, then; 2, finished product, processing after the completion of the test. Should use add rust powder to wash water. 3, in the process of transportation as far as possible to pack the goods in wooden cases, not contact with metal products. 4, after installation of pipelines, regularly carries on the maintenance and maintenance, such as the stem out often with lubricating oil. Appropriate to open and close the valve several times. Make the ball, stem, sealing surface is not easy to assimilate. Stainless steel ball valves are reducing and generally not reducing channel two structures. No matter the structure, the flow resistance coefficient of ball valve is smaller. Especially the so-called full flow type, i. e. , not reducing ball valve, due to its channel diameter equal to the inner diameter pipeline, local resistance loss only equivalent length of pipe friction resistance, namely in all valves, the ball valve minimum flow resistance. In rocket and its experimental system, the requirements of pipeline resistance as small as possible. There are two ways to reduce the resistance of piping system: one is to reduce the fluid velocity, therefore need to increase diameter and valve size, for the efficiency of pipeline system tends to produce adverse effect, especially for conveying system at low temperature ( Liquid hydrogen) Is very bad.
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