Hi, everyone,
I found an article by the Engineering Manager at a valve company <https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.linkedin.com%2Fpulse%2Fwhy-you-should-specify-purchase-metric-butterfly-valves-keeling&data=04%7C01%7Cusma%40lists.colostate.edu%7C81c400e7837346f7167708d9b6b28112%7Cafb58802ff7a4bb1ab21367ff2ecfc8b%7C0%7C0%7C637741700076297798%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=Hu8wRdm6oJ9KsHHZeah6P1yKI0PwYkuHOGShydt0mBk%3D&reserved=0> telling us that metric butterfly valves don't meet AWWA (American Waterworks Association) standard C504 and should be avoided. (I think "metric" is used as a synonym for "imported".) I don't know if this is article promotes a real concern about standards, a measure of protectionism for American valve manufacturers, or a dislike of the metric system. I noticed that he compares the American standard which is written specifically for water valves with a DIN standard for general-purpose valves. Are there accepted DIN or ISO standards for water valves that would make a fair comparison? Are there any engineers out there who can shed some light on this subject? This has been posted to Reddit’s metric forum and comments (if any) will be here: https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.reddit.com%2Fr%2FMetric%2Fcomments%2Fr8at2d%2Fwhy_you_should_not_specify_or_purchase_metric%2F&data=04%7C01%7Cusma%40lists.colostate.edu%7C81c400e7837346f7167708d9b6b28112%7Cafb58802ff7a4bb1ab21367ff2ecfc8b%7C0%7C0%7C637741700076307793%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=t4IdVY1z8oGsdnBH0dmLi0Ml0D2uM4Z3sDyGcKzR1Jk%3D&reserved=0 <https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.reddit.com%2Fr%2FMetric%2Fcomments%2Fr8at2d%2Fwhy_you_should_not_specify_or_purchase_metric%2F&data=04%7C01%7Cusma%40lists.colostate.edu%7C81c400e7837346f7167708d9b6b28112%7Cafb58802ff7a4bb1ab21367ff2ecfc8b%7C0%7C0%7C637741700076307793%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=t4IdVY1z8oGsdnBH0dmLi0Ml0D2uM4Z3sDyGcKzR1Jk%3D&reserved=0> Best wishes, Peter Goodyear, Melbourne, Australia e-mail: [email protected]
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