The two main types of gate valves are:
1.Rising Stem Gate Valve: In a rising stem gate valve, the stem is attached to the gate, and as the valve is opened or closed, the stem rises or lowers. This type of valve is easy to operate, and the position of the gate can be easily determined by observing the position of the stem.
2.Non-Rising Stem Gate Valve: In a non-rising stem gate valve, the stem is threaded into the gate, but the stem does not rise as the valve is opened or closed. Instead, the gate is lifted by the stem through a threaded connection. This type of valve is ideal for use in locations where space is limited, as they take up less vertical space than rising stem gate valves. However, determining the position of the gate can be more challenging with this type of valve.
