Oil is leaking from the gasket at the valve cover flange of the gate valve; if the valve is closed and a new gasket is installed, will the oil in the pipeline leak out?
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Oil is leaking from the gasket at the valve cover flange of the gate valve; if the valve is closed and a new gasket is installed, will the oil in the pipeline leak out?
Here’s a tip: after turning the valve on and off, tighten the valve stem packing gland slightly. Before opening or closing the valve, loosen the valve stem packing gland before proceeding with the operation. Just use the major maintenance to replace or add more packing. This should basically solve your problem. For reference.
It is recommended to perform the operation offline or in isolation
It’s likely missing. When the flange at the leak site was removed, it seemed that there was no packing seal around the valve stem; the valve stem and the interior of the valve body were connected to each other, so leakage was likely to occur.
If you remove the flange bolts of the valve cover, the valve cover, valve stem, and valve disc will all fall down: lol
There must be a leak. Online, you can only try tightening everything once using a torque wrench. If that doesn’t work, the only option is to use a clamp to seal the leak. During shutdown, the entire process is removed, followed by pressure relief and valve disassembly.
There’s a slight leak; tighten it up and use some sealant to cover it temporarily. Deal with it once the vehicle is stopped.
Operating under pressure is not recommended, as the medium will leak, which is very unsafe; it is best to handle it during maintenance.
It is highly risky to carry out repairs while the system is in operation; such actions are not recommended.
Try tightening this bolt. It’s not certain whether it’s an internal leakage issue; the safety of disassembling it cannot be guaranteed, so it’s better to replace or repair it during the maintenance period.
Theoretically, it should work if there are no issues with the gate and sealing surfaces, and if the valve does not leak internally. During safety periods, it is recommended to perform online sealing or offline repair.