GUIDELINES FOR FACTORY INSPECTION OF PUMPSETS FOR WATER SUPPLY (IS 1710:1989)
The vital parameters to be checked while inspecting the pump set are:
Prior to conducting the inspection, it should be ensured that the factory furnishes the detailed..
Quality Assurance Program (QAP):
1) Name of manufacturer
2) Serial Number
3) Type
4) Size
5) Speed (rev/min)
6) Discharge
7) Head (meters)
8) Pump input ( kW)
Dimensional Check
Measure the dimensions of the various components of the pumpsets such as base frame, suction flange, delivery flange etc and ensure the same is as per the approved pumpset drawings.
Sampling (As per IS 10572-1983)
The number of pumpset to be selected from a lot shall depend upon the size of lot and in accordance with table given below:
Outside dia of steel Pipe (mm) |
Minimum Thickness of lining (mm) |
Tolerance (mm) |
168.3 to 323.9 |
6 |
0,+2 |
355.6 to 610 |
7 |
0,+2 |
660 to 1219 |
9 |
0,+2 |
1321 to 2540 |
12 |
0,+3 |
The Performance test of Pumpset is conducted at the factory . The discharge of the pump is observed at different total head (Static Head + Delivery Head +Velocity head) and different Pump input power. The discharge, total head and Pump Input power are directly recorded:
Based on the above values pump output power & efficiency of pumpset is calculated as:-
Pump Output Power (in KW), Po = (Q * H)/102
Where Q= Discharge (in Liters/sec), H= Total Head in meters
Pump Efficiency (?) in %= ( Po/Pi )*100
Where Pi = Input Power of Pumpset (in KW) which depends on motor efficiency.
Following graphs are plotted in the performance test of the Pumpset:
Based on the above plotted graph the pumpset shall be guaranteed for their performance of the nominal volume rate of flow and the nominal head at the guaranteed point. The overall efficiency of the pumpset shall be guaranteed at the declared point only.
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