What type of valve is suitable for air ducts?
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As the title suggests, it’s a wet air pipeline; currently hard-sealed butterfly valves are being used, but after opening and closing them a few times, they can no longer seal properly. Do anyone have any good recommendations? Thank you~
If butterfly valves are not effective, it is recommended to use ball valves instead; those with composite graphite sealing materials are preferable, as they can be repaired and adjusted in case of leaks and have a longer lifespan. Ball valves that use metal-based seals can also be used.
The material is stainless steel; soft-seal valve switches are preferable as they provide a tight seal.
If the butterfly valve does not provide proper sealing, consider using a different type of valve, such as a ball valve.
Leakage is inevitable when using hard-sealed butterfly valves for gas piping, and this leakage falls within the limits permitted by standards; hard-sealed butterfly valves themselves do not achieve zero leakage； If the operating conditions permit, soft-sealed butterfly valves or ball valves can be used; ball valves offer double sealing, which is slightly better than the single sealing of butterfly valves!
This depends on parameters such as the pipeline diameter, pressure, and pressure difference. If the diameter is small, globe valves can be used; for larger diameters, gate valves are suitable
Many stop valves and gate valves fail to close properly
The key issue is not the selection of the valve, but rather your air quality. The high presence of impurities is the main reason for valve damage and poor sealing. It would be better to start by addressing air quality issues. Additionally, ball valves have a certain shear capacity, which might be better. However, working frequently in a medium environment with impurities can also cause damage. Especially at the packing seal.
Both globe valves and stop valves can be used; globe valves are better.