How often do SDV valves and ball valves need to be taken apart for maintenance?
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How often do SDV valves and ball valves need to be taken apart for maintenance? It isn’t mentioned in some maintenance manuals. Our valves have been in use for 6 or 7 years now, and they haven’t been serviced at all. It seems that it’s better to just replace it directly rather than taking it apart!
In a clean medium environment, valve wear is minimal, and coupled with the reduced number of opening and closing cycles, the valve can remain in use for a long time. When a granular medium is present, a good hardened layer is formed, and the service life is also longer. But the length for relatively clean media is still shorter. Whether to repair it depends on a cost comparison; for valves with high manufacturing costs, it is more reasonable to repair them.
Thank you to the two people above. The SDV and BDV valves at our site are almost 7 years old now, and we haven’t taken them apart for maintenance; they are still working properly. But some people say that regular maintenance is necessary – isn’t there any general standard for that?
There is no time limit; it depends on whether there is a leak or not, based on the actual situation.
This post was last edited by Pandora on 2017-10-18 at 14:48. Doesn’t your company need any maintenance? It is removed for pressure testing during maintenance. It can be done by oneself, or a maintenance team can be hired. If there are a large number, a portion of them can be inspected each time. It’s very simple if you do it yourself. Install flanges at both ends, drill holes in the flanges, and attach threaded quick connectors (stainless steel or copper ferrule connectors can also be used), as well as air supply pipes. The front end of the valve is connected to the source, while the gas supply pipe at the back end is placed in a water bottle. After closing the valve, pressurize it with compressed air to check if bubbles emerge from the other end of the valve. To determine the valve operating conditions, it is necessary to know what pressure in kilograms is required. The maximum pressure of compressed air in our company is 15 kilograms. So there are still limitations to doing it by oneself. If the sealing performance is poor, it will be necessary to replace the seals, gaskets, packing, and similar components. If there is no relatively professional instrument maintenance team. I suggest you outsource it instead. Taking it apart is simple, but if you can’t put it back together, it’s a pain in the neck.