How to judge the quality of valve castings from the surface

The specific standards are as follows:

1. Check whether the surface of the Valve Casting is clean and whether there are defects. Defects that can be seen on the surface of valve Castings, such as blisters, cracks, spots, etc., valve castings with these conditions are of poor quality.

2. Whether there are certain defects in its key parts, such as connecting parts, such as linear twill, cracks, etc. The appearance of these defects can also directly say that the valve casting is of substandard quality.

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