These three valves on the pump discharge line together
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Please help me, seniors, what do these three valves on the pump sewage pipeline together mean?
It looks like the pump is from Galite. The double valves provided on normal equipment are enough. Your factory added another one for safety reasons. Prevent the valve from not closing tightly, causing medium leakage.
Not sure what a downstream connection is? As far as operation is concerned, on the one hand it is indeed the same as what was said on the second floor. On the other hand, I think it is normal to only operate the middle valve, and keep the front and rear valves in a normally open state. If the middle valve is not closed tightly, you can close the front and rear valves, isolate them, and replace the middle valve.
I guess your pipe is more important. The first valve cannot be closed properly. The three valves should be installed to prevent the front valve from being closed and affecting production.
Well, do you think there is any other use for setting so many settings?