Treatment of valve cover leakage
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The valve cover is leaking. What can be done to fix it? The bolts have already been tightened, and performing a mechanical repair is very complicated. How can it be repaired online? It’s urgent! It would be best to have pictures.
You can consult about plugging leaks under pressure
Aren’t you going to mention the pressure level? For high-pressure situations, seal the leak under pressure; for low-pressure situations, loosen the bolts one by one and insert lead strips to fix it
It depends on your medium and pressure rating. If low pressure can indeed compress the lead strips one by one. If the shape of the lid permits, consider using a clasp.
To add to what was said upstairs: if the pressure is high and the valve has a large square cover, then it’s necessary to use a large, thick-walled tee to enclose the entire valve~~~~