The discharge valve have been shut and sealed.

排出阀已经关闭并密封。

Air lock and dust discharge valve open or close in turn up and down.

锁气翻板卸灰阀为上下交替开闭，自动复位机构。

Said fixer can be used for controlling action of discharge valve plate.

固定器控制排出阀门板的动作。

Do not let pump run for long in the circumstance of discharge valve closed.

注意不要在排出阀关闭的状态下长期运转。

The top steam discharge valve discharge distance could regulate to maintain the working pressure.

顶部排汽阀的开度应调控，以保持连排内的工作压力。