How to fix a stuck gate valve Clean any atmospheric deposits from the gate valve threads. Apply 3-in-one or penetrating oil to the gate valve. Wipe the excess oil with a rag and ensure that the oil reaches the valve's threads. Tap the valve handle with a hammer to check if the valve changes position from open to closed.

Use a small screwdriver to scrape any loose debris out of the grooved channel that acts as the valve's gate guide. Clean this thoroughly; even a small amount of buildup will prevent the valve from closing completely. Slide the gate back into its guide and tighten the top of the housing with a wrench.

First, isolate the valve by shutting off the system to prevent further leakage. For minor leaks, replacing the stem packing or gaskets might resolve the issue. If the valve seat or gate is damaged, you may need to reseat or replace these components. Tighten or replace any loose or corroded bolts and ensure the valve bonnet is properly sealed.

Close the shut-off valve in front so that the medium is in a static state, and discharge the medium in this section of the pipeline, if it is a flange-connected gate valve, you need to remove the bolt and nut of the connection, clean the sealing surface, replace the gasket and reconnect the new ball valve.