KIRLOSKAR BROTHERS LIMITED
KIRLOSKARVADI 416 308
Suction line –
To ensure operation free from cavitation, observe section 2.3 [inlet conditions] of
this manual. The diameter of the suction pipeline shall not be less than the suction
size of the pump. With positive suction operation from a tank under vacuum, it is
advisable to fit a vacuum balance line.
N.B.:
To maintain the self-priming feature of the pump, it must be ensured that pump is
always filled with the liquid.
Discharge line –
The size of discharge pipe should be such that its diameter is at least as large as
the cross section of the pump discharge flange.
2.3
Inflow conditions [NPSH] -
Pay close attention to the suction head or NPSH-value of liquids pumped at near
boiling point, because non-observance could cause the pump to run under
cavitation, which, in turn, could destroy the hydraulic parts.
The decisive factors for determining the NPSH-available value are temperature,
vapour pressure, density, suction head and pipe loss.
2.4
Valves -
Fit the pump with a manometer/vacuum gauge or pressure gauge on both suction
and discharge sides.
A throttle valve is to be fitted on the discharge side in order to maintain the exact
delivery head [see name plate].
Make sure the pump is always filled with the pumping liquid to maintain the self-
priming feature of the pump. Fit a non-return valve to stop reverse flow of the
liquid with suction lift operation
2.5
Checks -
After completing installation of the pump-set, check all piping and connections for
leakage. Check piping to ensure free from blockage. It must be possible to rotate
the shafting of smaller sized pump-sets by hand. Check the operational safety of
the entire pumping plant on the basis of the applicable accident prevention
regulations [electrical connections, coupling guard, etc].
