noun
butterfly valve
Rare technical term for a butterfly valve; the loanword バタフライバルブ is more common in modern Japanese.
See also: バタフライバルブ
この配管には蝶形弁が使われている。
A butterfly valve is used in this piping.
The common loanword for butterfly valve; 蝶形弁 is a rare native Japanese equivalent used mainly in older or formal technical contexts.
Compound of 蝶形 (butterfly-shaped) and 弁 (valve), describing the valve's disc that resembles a butterfly.