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          Calculation Method of liquid sewage pump head

          Under the liquid sewage pump head means lower energy liquid under liquid sewage pump unit weight of the liquid being pumped back through the liquid under submerged sewage pump to get to H said that the unit is m.

          Head is a concept of incremental energy, the energy increment, liquid (liquid pumps imported) from the liquid to the pump inlet flange outlet flange (sewage sump pump outlet) obtained.

          Submerged sewage pump head can be expressed as

H = E2-E1 (7-2)

E2- following formula liquid sewage pump energy (m) at the outlet of the unit weight of the liquid;

Energy sewage pump inlet fluid under E1- unit weight of the liquid (m).

Energy per unit weight of the liquid in the head called in hydraulics, Z position of the head by the pressure head P / ρg and velocity head v2 / 2g of three parts, namely:

E2 = p2 / ρg v22 / 2g z2

E1 = p1 / ρg v21 / 2g z21

Where P2, under P1- liquid sewage pump outlet, static pressure at the inlet of the liquid (Pa);

V2, under V1- liquid sewage pump outlet, inlet fluid velocity (m / s);

z2, under z1- liquid sewage pump outlet, the inlet to the next liquid sewage pump measuring distance (m) datum;

ρ- liquid density (kg / m3);

g- gravitational acceleration (m / s2).

Therefore, liquid sewage pump head is

H = E2-E1 = (P2-P1) / ρg (v22-v12) / 2g

          Performance Characterization lift pump itself under liquid sewage pump submerged, with only liquid sewage pump energy imports, exports at lower fluid-related, but not directly related to lower liquid sewage pump devices. But sewage pump head can be calculated using the energy device under liquid liquid.