Industry new

Valve degreasing method

First, the stainless steel valve cleaning steps: the valve components must be processed through the following processes before assembly:

1, according to processing requirements, some parts need to be polished, the surface can not be processed burr;

2, all parts degreasing treatment;

3, after the completion of degreasing pickling passivation, cleaning product does not contain phosphorus;

4. After being pickled and passivated, rinse with pure water, and there should be no residue of the chemicals. Carbon steel components eliminate this step;

5. One by one component is wiped with a non-woven fabric, and the surface of the components such as wire wool cannot be retained, or it can be blown dry with clean nitrogen;

6. Wipe the individual parts with non-woven cloth or precision filter paper and wipe the pure alcohol until no dirt is found.

Second, the assembly requirements:

Clean parts must be sealed for installation. The installation process requires the following:

1. The installation shop must ensure cleanliness, or set up a temporary clean area, such as the newly purchased color strip cloth or plastic film, to prevent dust from entering during the installation process.

2, the assembly workers must wear clean cotton overalls, wearing a cotton cap, hair can not leak, wear clean shoes, wear plastic gloves, degreasing.

3, assembly tools must be degreased and cleaned before assembly to ensure cleanliness.

Third, other requirements:

1. The assembled valve is purged with nitrogen for at least 1 minute.

2, airtight test must be pure nitrogen.

3. After the airtight test is qualified, carry out the enclosure, seal it with a clean polyethylene cap, and soak the polyethylene cap with an organic solvent before use.

4. Then seal with a vacuum bag.

5, the last box.

6. Take measures to ensure that the envelope is not damaged during the transportation.

4, acceptance requirements

Acceptance follows HG 20202-2000 “Specifications for Construction and Acceptance of Degreasing Projects”. Before assembly, each part is wiped with clean, precision filter paper. Select dead parts of the parts and the filter paper is not qualified.

PREVIOUS：Vulcanization of rubber productsNEXT：The nominal pressure of the valve