The valve has a clear opening and closing sign. What does this sentence mean?
In the hand wheel or valve placed on the signs, the contents of the device name, switch direction and so on.
Simply speaking, a gate valve, hand wheel will be above the arrow and open and close the text, indicating that you are clockwise valve open or counterclockwise valve open, so as not to make mistakes, accidents. Other valves are similar in sense and sign.
Not only on the valve is enough to mark, here means that at the scene can see the installation of the pipe network on the valve open or shut?!
Simply speaking, a gate valve, hand wheel will be above the arrow and open and close the text, indicating that you are clockwise valve open or counterclockwise valve open, so as not to make mistakes, accidents. Other valves are similar in sense and sign.
