Selection of bolts and studs for wafer butterfly valves
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Must wafer butterfly valves use double-headed studs? Is there a standard specification that requires the use of double-ended studs, in addition to the convenience of perforation and the ease of adjusting the precision with nut bolts at both ends? If there’s no basis for it, then hex head bolts can still be used, right?……
Follow the corresponding pipeline design and installation specifications
They are usually double-headed bolts, which facilitate installation and removal. Some butterfly valves are located very close to equipment or building structures, and single-headed bolts make it difficult to remove them. As for the standard specifications, I haven’t seen them.