What kind of shut-off valve should use hard seal as far as possible?
The leakage of the shut-off valve is as low as possible. The leakage of the soft-sealed valve is the lowest. Of course, the shut-off effect is good, but it is not wear-resistant and has poor reliability. From the leakage rate to the shut-off valve, the lower the leakage, the better. The leakage of the soft-sealed valve is the lowest. The cut-off effect is of course good, but it is not wear-resistant and has poor reliability. Judging from the double standards of small leakage and reliable sealing, soft sealing is not as good as hard sealing. For example, the full-function ultra-light regulating valve, sealed and stacked with wear-resistant alloy protection, has high reliability and a leakage rate of 10-7, which has been able to meet the requirements of the shut-off valve.
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