How to deal with valve packing leakage
Thread Content
How to deal with valve packing leakage and how to replace the packing?
Tighten it first. If it doesn't work, remove the packing gland and replace the packing. It's best if it can be removed. If it cannot be removed, remember to drain the fluid and relieve the pressure.
If the packing seal gland does not bottom out, you can tighten it first. If it has reached the bottom and is still leaking, you can only replace the packing. Before replacing the packing, you must ensure that there is no pressure.
If there is still room for tightening, you can tighten it further. If there is no room for tightening, it is best to cut it out and replace it. If it is really not possible, if it is a gate valve, open the valve fully to the position and add a few sections of packing on top.
Theoretically, when the gate valve is in a fully closed state, it is possible to untie the packing gland and return the packing without removing the material, but I have never dared to do this. If I have a chance, I will try it on fresh water. When the stop valve is closed (low inlet, high inlet), the pressure behind the valve must be removed and the material must be discharged to do this.
The stop valve can be tightened directly, or a reverse seal can be used. Replace packing
If the packing sleeve has adjustment margin, then tighten the plate nut and compress the packing again. When there is no pressure in the pipeline, you can dig out the original packing and quickly replace the packing or the spare parts provided by the manufacturer. Even if there is an inverted seal structure, it is not allowed to replace the packing online under pressure. This is stipulated in many standards and clearly states that the inverted seal structure is not recommended. Customers can replace and repair the packing online.
Stop the car for maintenance, disassemble it and replace the packing. Why would you ask such a weird question?
If it cannot be tightened anymore, it must be stopped for maintenance, otherwise an accident may occur.
Thank you all Hai friends. The valve packing leakage can be slowed down or even prevented by tightening the lock nuts at both ends and increasing the pressure ratio of the packing. Replacing the packing must be done after shutting down for maintenance or cutting off the pressure. I would like to ask if the packing is easy to replace? Has any Hai friend replaced it? Are the accessories easy to sell? After all, replacing the valve is a waste. Although I don’t have to pay out of my own pocket, I want to learn a skill
Very simple. In the past, packing was more troublesome. Nowadays, open graphite rings are used. It is very convenient to fill. However, when it is aged and taken out, the stuffing box of the high-pressure valve is deep and the innermost part is not easy to remove. Make special tools and ordinary packing hooks will not work hard.