The check valve at the gray water pump outlet does not return to its original position
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The ash water pumps operate in a one-active-one-redundant configuration. When the active pump is switched to the redundant one, the former active pump cannot return to its normal position due to scaling on the check valve, which prevents it from starting automatically in standby mode (the pump starts rotating in reverse as soon as the outlet valve opens). The check valves we use are of the wafer type; I would like to know what type of check valve would be more suitable for such an environment. Additionally, I would like to ask what type of check valves are used at the outlet of the gasification ash water pumps by other manufacturers in this industry I heard that some manufacturers use swing-type ones, which generally last around two years.
The hardness in gray water is high; the structure of the check valve is selected by understanding the structure of the one-way valve. A wafer-type butterfly check valve? It is necessary to consider the flow rate and lift height of the on-site water pump to prevent water hammer on site
Are you using a butterfly double-disc check valve right now?
Try to do some research on the structure of check valves used in other factories. If everything is fine, proceed with pumping in reverse as planned; avoid not doing so for long periods of time, as this can lead to scaling that prevents the valves from closing properly