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This post was last edited and deleted by 2nd Battalion Commander_pYUes on 2022-12-14 at 15:05. Thank you. Can’t you delete it yourself?
This is due to the insufficient calculation of the compression amount; such valve switches require extremely high torque to operate. Its service life is also very short, so it is not recommended for use.
It is also possible that the temperature and pressure exceed the rated values for non-metallic materials
It is speculated that when the valve is closed, the LPG trapped inside the valve core’s passage experiences increased pressure as temperature rises, which pushes the sealing gasket and causes it to deform. It is recommended to use a bored ball valve.
I haven’t used a drilling ball valve yet; does the original poster have any samples or photos of the actual product?
None at all. You can buy a regular ball valve, position the valve core in the fully closed position, and then use a drill to create a hole in the valve core at the exact center of the flow channel on one end of the valve. Drilling is not possible on the opposite side. In this way, when the valve is closed, the liquid trapped within the valve element’s passage can be released through this hole, without affecting the valve’s sealing performance.
Relief valve to prevent pressure buildup in the middle chamber; our company can manufacture it.
Ultimately, it’s the poor quality of the valves. To determine the specific reason, it is necessary to carefully check whether there are significant deviations in the alignment of the valve ball, valve stem, and seat, the degree of compression of the valve seat, and whether there is insufficient material at the bottom of the valve seat hole. But judging from the threaded burrs on the metal parts, this is the product of a small workshop. For such products, there’s no need to talk about design or anything similar; the manufacturer may not even have official drawings, and production relies entirely on a few key dimensions and the experience of the workers.
It can’t be a small factory that transports liquefied petroleum gas.
If several symmetric pressure-relief grooves are made on the outer circle of the valve seat, it might solve the problem; this is just my personal opinion for reference only
Check the manufacturer of the valve. Valves from large companies can also be purchased from small workshops; it’s best to find reliable manufacturers directly.