Disconnect the connection upstream of the valve.
答案解析
解析:
生活中,我们可以通过水龙头来联想。当我们需要修理水龙头时,为了安全起见,我们会先关闭水龙头,然后再拆卸连接水管的部分,这样可以避免水流造成的意外。同样道理,拆卸阀门连接时也需要考虑流体的方向和安全性。
相关知识点:
断开阀门上游的连接
相关题目
If you cannot remove a bolt because of corrosion, apply penetrating oil.
Do not use solvents that contain chlorine to clean parts with a Rilsan coating.
The PI shows the remaining time to make the copy of the data.
Do not stretch the seals more than necessary when you install them.
Apply mineral hydraulic fluid to the surface of parts that touch the seals.
First try to install the adaptor with the shortest threaded area.
In a high concentration, this material is poisonous.
Turn the adjuster five clicks counterclockwise.
Polish the window with a circular movement.
Fill the space between the patch and the adjacent structure with sealant.
