Spool valve with notches is one of the basic constructions of hydraulic valve,which places several notches axisymmetrically on the spool to form the restriction configuration.

• 节流槽滑阀是液压阀的基本结构形式之一,其阀口是在阀心凸肩上均布若干不同形状的节流槽,用于获得不同的流量控制特性。