Gate Valve
A gate valve is a valve designed to fully open or fully close flow in a piping system. It uses a gate or wedge that lifts out of the flow path to allow straight-through flow, or lowers to block it. Gate valves provide a tight seal when closed and minimal resistance when open, but they are not ideal for throttling or partial-flow control.
💡 Key Takeaways
- ✓A gate valve is a valve designed to fully open or fully close flow in a piping system. It uses a gate or wedge that lifts out of the flow path to allow straight-through flow, or lowers to block it. Gate valves provide a tight seal when closed and minimal resistance when open, but they are not ideal for throttling or partial-flow control.
- ✓Gate valves should be fully open or fully closed for best longevity.
- ✓They create low pressure drop when fully open.
- ✓Worn seats or corrosion can cause leaks over time.
Gate Valve
/ɡeɪt vælv/
Definition
A gate valve is a valve designed to fully open or fully close flow in a piping system. It uses a gate or wedge that lifts out of the flow path to allow straight-through flow, or lowers to block it. Gate valves provide a tight seal when closed and minimal resistance when open, but they are not ideal for throttling or partial-flow control.
When should a gate valve be used?
Use it for on/off control where the valve stays fully open or fully closed most of the time.
Source: The Cooling Company
Quick Facts
How Gate Valve Works
Gate valves are best for full open or full closed use.
Real-World Application
A main water shutoff uses a gate valve to fully stop flow during repairs or emergencies, while remaining fully open during normal operation.
Pro Tip
Exercise gate valves periodically to prevent the gate from seizing due to corrosion or sediment buildup.
“Exercise gate valves periodically to prevent the gate from seizing due to corrosion or sediment buildup.”
Important Things to Keep in Mind
- Gate valves should be fully open or fully closed for best longevity.
- They create low pressure drop when fully open.
- Worn seats or corrosion can cause leaks over time.
Did You Know?
Gate valves have been used since the 19th century and remain a staple in fluid piping systems.
FAQ
Can a gate valve be used to regulate flow?
Not recommended. Partial opening can cause vibration and wear.
Why is my gate valve hard to turn?
Corrosion or sediment buildup can seize the gate or stem.
Should gate valves be replaced with ball valves?
Often yes. Ball valves provide more reliable shutoff and are easier to operate.
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