11
L
L
L
L
0
0
0
0
0
0
0
0
1
1
/
/
E
E
B
B
–
–
R
R
e
e
v
v
.
.
G
G
–
–
1
1
0
0
/
/
2
2
0
0
1
1
7
7
I
I
T
T
A
A
/
/
G
G
B
B
/
/
F
F
R
R
PROBLEM
PROBABLE CAUSE
REMEDY
4.
EXCESSIVE BREAK
POWER
4.1 PUMP PERFORMANCES ARE
DIFFERENT THAN RATED.
DELIVERY GATE VALVE
PARTIALLY CLOSED..
4.2 LIQUID SG HIGHER THAN
SPECIFIED.
PUMP NOT SUITED TO THE
SERVICE OR DELIVERY GATE
VALVE PATIALLY CLOSED.
4.3 ABNORMAL INTERNAL RUBBING
(ROTATING PARTS RUB AGAINST
FIXED PATRS).
REPAIR THE PUMP, SEE CHAP.
8.
5.
THE SEAL LEAKS
EXCESSIVELY
5.1 WORN MECHANICAL SEAL.
SEE CHAP. 8.
5.2 WORN SHAFT AT MECH SEAL
POSITION.
REPAIR THE PUMP, SEE CHAP.
8.
6.
THE PUMP VIBRATES
AND IT IS NOISY
6.1 UNBALANCED ROTATING
ASSEMBLY.
REPAIR THE PUMP, SEE CHAP.
8.
6.2 MOTOR BEARINGS FAILURE.
SEE CHAP. 8.
6.3 THE PUMP RUNS WITH TOO LOW
OR TOO HIGH CAPACIT; ALSO THE
SAME CAUSES AS POINTS 1.3, 2.1,
2.2.
OPERATE THE PUMPS
DIFFERENTLY; REMOVE THE
CAUSES OF THE
MISFUNCTIONING.
6.4 PUMP AND/OR PIPING NOT
FIRMLY FASTENED.
CORRECT INSTALLATION.
