30/06/2026
A gate valve is mainly used to start or stop the flow of liquid in a pipeline. Its purpose is to allow water or other fluids to pass fully or completely block them.
Main Purposes of a Gate Valve
Shut Off Flow Completely
Used as an ON/OFF valve.
When closed, it blocks the passage of water or fluid.
Common in water systems, pipelines, plumbing, and industrial applications.
Allow Full Flow
When fully open, the valve creates very little resistance.
Water flows smoothly because the gate lifts completely out of the way.
Isolation of Sections
Helps isolate parts of a piping system during maintenance or repairs.
Example: shutting off water supply to a building section.
Used in Clean Water Systems
Commonly used in:
Water distribution
Fire protection systems
Industrial pipelines
Irrigation systems
How It Works
Inside the valve is a metal “gate” that moves up and down.
Turn handle clockwise → gate goes down → flow stops.
Turn handle counterclockwise → gate lifts up → flow continues.
Important Note
Gate valves are not ideal for regulating flow halfway open because:
It can damage the valve over time.
It may create vibration and wear.
They are best used either:
Fully Open
Fully Closed
Common Materials
Brass
Bronze
Stainless steel
Cast iron
Your image shows a brass gate valve, commonly used in plumbing and clean water systems because brass resists corrosion well.
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