The dimensions shown in the below drawing are the minimum installation ones:

USR/USRF2,4	USR/USRF8,16

Performance curve
1 All curves are based on the measured values of 50Hz:
and constant motor speed 2900r/min; 60 Hz: and constant
motor speed 3500 r/min;
2 The allowable tolerance of the curve complies withIS
O9906 shown in attachment A.
O 3 For measurement, air-free water with temperature 20 C
and kinematical viscosity 1 mm2/s.
4 The pump application is in reference to performance
scope of Heavy line to prevent overheating due to too low
flow and motor overload due to too high flow-Rate Etc.
 

Section drawing USR,USRF,2,4	Material USR,USRF2,4

Section drawing USR,USRF,8,16	Material USR,USRF8,16