The valves are connected to dip tubes that run to the cylinder sides. The top valve will have the dip tube in the vapor and the bottom valve will have the dip tube in the liquid.

• 阀门上连接着汲取管，汲取管伸入到钢瓶内侧。上面的阀门的汲取管处在蒸气里，下面的阀门的汲取管处在液体里。