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A plug valve controls the fluid flow with a cylindrical or conically tapered “plug”. This plug rotates and regulates the flow through the valve. Subsequently, plug valves require periodic maintenance to maintain functionality and optimal performance.
Here are the plug valve activities:
However, several other troubleshooting actions are necessary to handle potential plug valve issues in any system or equipment.
Specific Issue | Cause | Troubleshooting |
---|---|---|
Sticking or Hard Operation | Debris, lack of lubrication, and corrosion | Clean the valve internals, lubricate, and replace corroded parts |
Leakage From the Valve | Worn seals, incorrect plug alignment, and valve seat erosion | Replace seals/valve seat and realign plug |
The Problem in Complete Shutoff | Misaligned/worn plug, worn valve seat, and debris obstruction | Repair/replace the plug and valve seat, clean debris, repair/replace valve seat |
Excessive Wear | Rapid cycling, abrasive flow, and unsuitable valve sizing | Review application specifications, use wear-resistant materials, and maintain proper sizing |
Plug Valve Issues and Troubleshooting