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How to calculate the static pressure of the liquid:
(1) the pressure at the inlet section of the single-stage single-suction centrifugal pump (Ps). The pressure calculated from the pressure at this elevation (zs).
(2) the pressure at the outlet section of the centrifugal pump (Pd). The pressure calculated from the pressure at this elevation (zd).
(3) the pressure at the pressure gauge at the inlet section of the centrifugal pump (Psm). Measure the pressure of the pressure gauge in the pipe filled with liquid. Measurement of liquid filling: Ps=psm+pgzs,m. ρ-- measure the liquid density in the pipe gMurt-gravity acceleration zs,m-- centrifugal pump inlet section pressure gauge center height and the height of the measuring point is filled with gas to measure the pressure of the pressure gauge in the pipe: Ps=Psm.
(4) equal to the pressure in the pressure gauge at the outlet section of the centrifugal pump (Pdm).
1 the pressure at the inlet section of the centrifugal pump (p). The pressure calculated from the pressure at the entrance section (Aa) of this elevation (za) (Ae).
(2) the pressure at the outlet section of the centrifugal pump (pa). The pressure calculated from the pressure at the exit section (Aa) of this elevation (za).
(3) the air pressure in the place where the centrifugal pump is installed (PD).
(4) the saturated vapor pressure (PD) of the fluid. It refers to the absolute pressure at which the fluid evaporates at the temperature at the inlet cross section of the centrifugal pump.
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