【Daily Question】Deep Processing 20160911 Fill-in-the-blank: What is the bolt specification suitable for the Z41H-25 valve? （ ）
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This post was last edited by B0SS on 2016-9-11 at 14:17. To increase popularity and foster technical exchanges among forum members, the 【Daily Question】 series is published. Participation earns 4 points of wealth! 10 wealth points as a reward for correct answers or in-depth discussions! :Lol fill-in-the-blank question: The appropriate specification for the connecting bolts of the Z41H-25 DN20 PN25 valve is ( ). Answer: M12×70 ============================================= ☛【Haichuan Voting】A beautiful blue sky is here – please choose the one you think is the most beautiful! http://bbs.hcbbs.com/thread-1613972-1-1.html (Source: Haichuan Chemical Industry Forum) ☛ Announcement on the selection and rewards for outstanding moderators, technicians, and star members from January to July 2016 in the “Petroleum and Chemicals Section” http://bbs.hcbbs.com/thread-1608031-1-1.html (Source: Haichuan Chemical Industry Forum) ☛ The second round of selection for outstanding management members at Haichuan – taking place in August and September; the top prize is a Xiaomi tablet http://bbs.hcbbs.com/thread-1609580-1-1.html (Source: Haichuan Chemical Industry Forum)
Z stands for gate valve (the first letter of Zha); 4 indicates flange connection; 1 denotes a rigid single-gate plate with a visible stem. H is the code for the material of the valve seat seal or lining (the first letter of He, referring to alloy steel). 25 represents the nominal pressure of the valve, meaning the maximum operating pressure under normal conditions is 25 kilograms. Those marked with c are likely made of cast steel
Many kinds. For example, M16*70-8
The appropriate connection bolt size for the Z41H-25 valve is (M16).
Choose double-ended studs and fully threaded studs depending on the operating conditions; the size is M12x75, and the material is determined based on temperature and the medium