Two type newly developed rotary valves for mine use are introduced.They are characterised by single or double cylinder valve cores which form a flow passage of U or O shape.

• 介绍了两种新研制的矿用旋转阀，两阀的特点是阀芯为单柱或双柱体，构成U或O形的过流通道，在全启至闭的整个调节范围内，通道形状保持不变而面积为线性变化。