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Question:

How to identify a good or bad valve?

How to identify the good or bad of the valve, without pressure test and instrument?

Answer:

First, the appearance, two according to the standard to see flange thickness, outer circle, wall thickness and other dimensions are standard, 3 see details.
You can see what the material inside the valve ~ basically copper heart relatively durable, solid ~!
First, the appearance, two according to the standard to see flange thickness, outer circle, wall thickness and other dimensions are standard, 3 see details.

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