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This is what you should wind up with: A nice clear ring in the ink, indicating a positive seal around the perimeter of the valve seat. The ring should fall somewhere in the middle of the seating surface of the valve, preferably toward the outer edge. Our ring was slightly toward the inside, which is still acceptable. If the sealing ring falls right at the inner edge or partially off of the outer edge of the valve, further machining is necessary. View Related Article
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