A valve is a mechanical device that controls the flow, direction, pressure, temperature, etc. of the flowing fluid medium. The valve is a basic component in the pipeline system. This article mainly introduces the specific requirements for pre-treatment of valve assembly.

Specific requirements for valve pre-assembly treatment:

1. According to the processing requirements, some parts need to be polished, and the surface must not have processing burrs, etc.;

2. All parts are degreased;

3. Pickling passivation is carried out after degreasing, and the cleaning agent does not contain phosphorus;

4. Rinse with pure water after pickling and passivation. There should be no residues of chemicals. This step is omitted for carbon steel parts;

5. Use non-woven cloth to dry the parts one by one, and do not leave the surface of the parts such as wire bristles, or blow dry with clean nitrogen;

6. Use non-woven fabric or precision filter paper dipped in analytical pure alcohol to wipe each part until there is no dirty color.

Technical requirements for valve assembly:

1. The installation workshop must be clean, or set up a temporary clean area, such as newly purchased color striped cloth or plastic film, etc., to prevent dust from entering during the installation process.

2. Assemblers must wear clean cotton overalls, cotton caps, no leakage of hair, clean shoes on feet, plastic gloves on hands, and degreasing. 3. The assembly tools must be degreased and cleaned before assembly to ensure cleanliness.

Link to this article：Pretreatment requirements for valve assembly 

Reprint Statement: If there are no special instructions, all articles on this site are original. Please indicate the source for reprinting:https://www.cncmachiningptj.com/，thanks！

Sheet metal, beryllium, carbon steel, magnesium, 3D printing, precision CNC machining services for heavy equipment, construction, agriculture and hydraulic industries. Suitable for plastics and rare alloys machining. It can turn parts up to 15.7 inches in diameter. Processes include swiss machining,broaching, turning, milling, boring and threading. It also provides metal polishing, painting, surface grinding and shaft straightening services. The production range(include aluminum die casting and zinc die casting) is up to 50,000 pieces. Suitable for screw, coupling, bearing, pump, gearbox housing, drum dryer and rotary feed valve applications.PTJ will strategize with you to provide the most cost-effective services to help you reach your target,Welcome to Contact us ( sales@pintejin.com ) directly for your new project.