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What is the difference between a gate and a globe valve?
A valve is simply a device that directs or regulates flow by opening, closing or partially obstructing passageways.
How do you replace ball valves?
Depends on the valve type and style.
What is a plug valve?
Plug valves are valves with cylindrical or conically tapered "plugs" which can be rotated inside the valve body to control flow through the valve.