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Mechanical seal, water flow meter

Mechanical seal, water flow meter

(OP)
Hi guys,
My firm just started implanting water flow meters as support systems for the mechanical seals (double), the previous support systems (cooling tanks, coil heat exchanges...) used the water to cool the seal then returned it to the used water circuit. The problem I'm having is that the flow meter's manufacturer says that the water should go to the sewers after being used to cool the seals. My question is why is that the case and why can't that water be recycled to be used again like we used to do with the previous systems?.
Looking forward for your answers, thank you in advance, I'll be here for any additional information you might need.

RE: Mechanical seal, water flow meter

It's a good question to the vendor who makes the new flow meter for you.
One thought is that, as recycling the discharge water, it may create a back pressure to the flow meter. Or, It's a safety operation to ensure the actual water flowing through the mechanical seal by physically seeing it discharging to the sewer.

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