The structural dimensions of the valve provided by the manufacturer differ from those specified in national standards

2017-08-15View Original

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The structural dimensions of the DN100 PN1.6 ball valve found on Baidu are 280; why are they 229, 305, and 350 according to GB12221?

Reply #22017-08-15

In GB standards, the flange distance for ball valves is determined in accordance with the ISO5752 standard; various standards may specify different values for the flange distance. I’m not sure which standard or which company’s specifications you referred to on Baidu – could you share the link?

Reply #32017-08-24

Indeed, for the flanged soft-seal ball valve Q41F, the length of its valve body structure is 280 mm for DN100; however, according to the standard GB/T12221, it is 305 mm. Please provide an explanation

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The structural dimensions of the valve provided by the manufacturer differ from those specified in national standards

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