Non-Rising Stem Gate Valve

Stem Position: The stem remains stationary in vertical position when the valve is operated.

Threading: The stem has threads inside the valve body, typically engaging with the gate.

Compact Design: Ideal for underground or tight-space installations where vertical space is limited.

Position Indication: Since the stem doesn't move, external indicators are often used to show valve position (open or closed).

Advantages:

Requires less installation space vertically.

Protected stem-good for underground or buried applications.

Lower initial cost compared to rising stem valves.