noun
control valve; regulating valve
Technical term used in engineering contexts for a valve that adjusts flow, pressure, or temperature. The synonym 調整弁 is also common.
See also: 調整弁
この装置には精密な調節弁が使われている。
A precise control valve is used in this device.
調節弁の開度を変えて流量を制御する。
The flow rate is controlled by changing the opening of the control valve.
Compound of 調節 (adjustment, regulation) and 弁 (valve). The exact historical derivation is uncertain, but the term follows standard Sino-Japanese technical word formation.