Regulation is accomplished by rotating the handwheel clockwise. The disk position corresponds with the decimal indicator viewed through the display window. The closed position has a decimal indicator reading 0-0.

• 通过顺时针方向旋转手轮来实现调节。阀瓣开启状态与通过显示窗口显示的十进制指示器相一致。关闭状态在十进制指示器上的读数是0-0。