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Valve Problems

And why when a small two-seater valve work easy oscillation of single core, when the medium was away when the valve stability when media is when the stream closed, valve stability. There are two two-seater valve valve core, valve flow closed under, on valve core is away and so, in small open CV working, flow type of spool valve vibration caused by easy, which is why valve cannot be used with a small opening work. Two, why double sealed valve cannot be used as a shut off valve, two-seater valve valve core advantages of force structure, differential pressure, and it highlights the downside is two sealing surfaces cannot be both good contact, resulting in leaks. If artificially, mandatory for it to cut off, apparently well, even as it made a lot of improvements (such as double seal sleeve valve) is not desirable.