バルブのJ61YとHJ61Yには何か違いがありますか？Hはどのような意味ですか？
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バルブのJ61YとHJ61Yには何か違いがありますか？Hはどのような意味ですか？
JB/T 308-2004「バルブ 型式の表記方法」を確認してください
接頭辞のHは高温型を、Dは低温型を表す
J61Yは止弁で、その次がJH61Yだと思います。ストップバルブ。実際には、止回機能を備えた切替弁です。。
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