When disconnecting cylinders with diaphragm valves, it is most important to double close the valve and to properly install the outlet seal.
当切断钢瓶和隔膜阀的连接时，两次关闭阀门和正确安装排气口密封是最重要的。
2
One valve includes a cap (56) that provides a doubleseal (58, 60) .
一个阀门包括提供了双重密 封件（58、60）的盖子（56）。
3
Fully sealed: with cover and pole doubleseal design to prevent leakage of electrolysis. and the reliability of safe-valve prevent oxygen and dust from outside enter into the battery.