Should the centrifugal pump’s mechanical seal be controlled by flow rate or pressure for the flushing fluid? What is an appropriate value?
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Centrifugal pumps commonly used in chemical production generally come equipped with mechanical seals, which require external flushing for cooling and lubrication. Should the flushing fluid be used to control flow or pressure, and what level is appropriate?
We control the pressure; the pressure can be monitored using a pressure gauge. As for flow rate, we can’t install a flow meter for everything, right?
Flow rate and pressure are essentially the same thing; both represent constraints on the cooling effect
Bro, take a look at that book on hydraulic systems and you’ll understand the relationship between pressure and flow. These days, it’s mainly about looking at pressure
It seems to be based on the pressure being 0.05–0.1 MPa higher than the static pressure