Introduction to Gate Valves

A gate valve is a linear motion valve used to start or stop the flow of fluid. It operates by lifting a gate (usually a wedge-shaped disc) out of the path of the fluid. Gate valves are one of the most common types of valves used in piping systems.

How It Works

• The valve opens by raising a gate out of the fluid path.
• It closes by lowering the gate into the flow path, creating a seal.
• Operated by a handwheel, gear, or actuator that moves the gate vertically.

Key Features

• Full Bore Flow: When fully open, gate valves offer minimal flow resistance.
• Bidirectional: Can control flow in either direction.
• Tight Sealing: Excellent shutoff capabilities when fully closed.
• Low Pressure Drop: Ideal for applications requiring unobstructed flow.

Limitations

• Slow Operation: Requires multiple turns to fully open or close.
• Not for Throttling: Partially open gate can cause vibration and damage.
• Large Installation Space: Needs more space compared to ball or butterfly valves.

Maintenance: More prone to wear and corrosion in dirty or slurry services.