Sea friends, why can’t medium-line hard-sealed butterfly valves be manufactured? Is it because the precision requirements are too high? Abroad, it’s possible to create...
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I hope fellow sailors can give me some advice. . Is it because the precision requirements are too high that medium-line hard-sealed butterfly valves cannot be manufactured? Can lathes abroad achieve such high precision?
There are countless ways to create D371H; elastic sealing surfaces don’t perform well and have been gradually phased out. And you still say it can’t be made?
Is 371 eccentric? Centerline hard-sealed butterfly valves are only suitable for low-pressure applications where high sealing requirements are not necessary. Modern high-end hard-sealed butterfly valves are all of the triple-eccentric type, and it is said that they can handle pressures of up to 2500 LB abroad. I guess what you’re asking is whether pure-metal hard-sealed butterfly valves can be manufactured in China. Currently, hard-sealed butterfly valves in China are of multi-layer construction, that is, they consist of graphite combined with stainless steel; pure-metal versions cannot be produced there due to insufficient manufacturing precision
I just want to ask about pure metals. . I’m new to this field, so my explanations might not be very clear. Another question: if a triple-eccentric hard-sealed butterfly valve doesn’t have an insulation cover, is it not suitable for use with crystalline media? First, I would like to thank Haiyou for his guidance