Page: Heads of centrifugal pump

1] suction head (hs) : It is the vertical height of the center lines of the centrifugal pump above the water surface in the tank or pump from which water is to be lifted.

2] Delivery head (hd) : The vertical distance between the center line of the pump and the water surface in the tank to which water is delivered is known as delivery head.

3] Static head (Hs) : The sum of suction head and delivery head is known as static head.

$\therefore H_s = h_s + h_d$

4] Manometeric head (Hm) : The head against which a centrifugal pump has to work, is called as manometric head.

a) Hm = Head imparted by the impeller to the water - loss of head in pump.

$= \frac{vw_2 u_2}{g}$ - loss of head in impeller and casing.

$=\frac{vw_2 u_2}{g}$ (If loss of pumper is zero}

b] Hm = Total head at outlet of pump - Total head at inlet of pump.

$\therefore$ $(\frac{po}{pg} + \frac{vo^2}{2g} + zo) - (\frac{p_1}{pg} + \frac{v1^2}{2g} + zi)$

c] $Hm = hs + hd + hfs + hfd + \frac{vd^2}{2g}$

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modified 6 days ago  • written 6 days ago by gravatar for Renu Banswani Renu Banswani10
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