What is the difference between the check valve h64h-250 and the h61y-250?

Answer:

According to JB/T308-2004 "valve type programming method"One is the swing check valve (4), and the sealing surface is Cr13 (H)One is the lift check valve (1), and the sealing surface is made of Y

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What is the difference between the check valve h64h-250 and the h61y-250?

Answer:

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