What does the mean for the lift of a centrifugal pump?
The lift of the centrifugal pump refers to the height that the pump can lift water, usually expressed by Head, and the unit is meters.
The head of the centrifugal pump is based on the center line of the impeller, and it is divided into two parts.
1st part is suction height, The vertical height from the center line of the pump impeller to the water surface of the water source.
2nd part is water pressure head,The vertical height from the center line of the pump impeller to the water surface of the water outlet.
Pump total head = suction head + pressure water head
so, What does the mean for the lift of a deep well submersible pump?
deep well submersible pump, we always only say water pressure head, that is max head, The vertical height from the pump outlet to the water surface of the water outlet, this height is the pump can press the water up, which is called the max head or water pressure head or the water pressure lift.
and It should be pointed out that the head indicated on the nameplate refers to the head that the pump itself can generate, and it does not include the head loss caused by the frictional resistance of the water flow in the pipeline. When choosing a water pump, be careful not to ignore it. Otherwise, the water will not be pumped.
The effective energy obtained by the unit weight of liquid flowing through the pump. It is an important working performance parameter of the pump, also known as the pressure head. It can be expressed as the increase of the pressure energy head, kinetic energy head and potential energy head of the fluid, namely
H=(p2-p1)/ρg+(c2^2-c1^2)/2g+z2-z1
in the formula
H——head, m;
p1, p2——the pressure of the liquid at the inlet and outlet of the pump, Pa;
c1, c2——the flow velocity of the fluid at the inlet and outlet of the pump, m/s;
z1, z2——the height of entrance and exit, m;
ρ——liquid density, kg/m3;
g——gravitational acceleration, m/s2.
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