Regarding the leakage issue of wafer-type double-disc check valves
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This post was last edited by Sammy_Wang on 2015-10-23 at 12:13. Experts, regarding the double-disc swing check valve (butterfly check valve), does it leak? Still, **according to the standards, such check valves are allowed to leak; they have a specified leakage level.** Please feel free to share your opinions
For soft-sealed versions, zero leakage is required, while metal hard-sealed versions are tested according to standards that permit some leakage; the leakage level can be determined with reference to the relevant standards. If the processing precision of the product is high, zero leakage can also be achieved.
It depends on the leakage level you want; generally, most of them will leak
Check valves are considered process valves, and there is no such thing as a leakage rating; it is sufficient as long as their leakage level remains within the limits permitted by the API 598 standard.