Relationship between pressure and density before the valve after the centrifugal pump outlet valve is closed
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This post was last edited by r02t on 2020-3-21 at 17:40. What is the relationship between pressure and density in front of a centrifugal pump valve after it is closed? If transporting water, is pressure = pump head? If a low-density medium is being transported, such as one with a specific gravity of 0.7 ； Pressure = pump head * 0.7? Assume the pump inlet is at atmospheric pressure
Pressure = head * density * gravitational acceleration
pgh is static, from high to low. Ignoring the inlet pressure, if it is used for the pressure from the equipment outlet to the valve, does it still need to be converted? Assuming the pipeline resistance from the impeller to the valve is infinitesimally small, can this g be considered as the centrifugal acceleration a exerted by the impeller on the liquid, with h representing the rotational radius? par. If we only look at the pressure gauge on the equipment’s outlet, I think a change in density of 0.7 cannot be immediately reflected in the pressure gauge after the valve is closed; after all, there is always some power margin built into the equipment.
Listen to what’s said on the 2nd floor; additionally, the value of gravitational acceleration is g=9.80665 meters per second squared