SPX FLOW Johnson pump, Инструкция по эксплуатации, Страница: 30 / 57

28 Trouble shooting
KGE/EN (1711) 6.5
If symptoms persist the pump must be taken out of service immediately.
Contact with SPXFLOW or their appointed agents.
Table 4: Possible causes of pump failures.
Possible causes
A Wrong direction of rotatio
B Pump not filled with liquid
C Inlet or suction pipe insufficiently submerged
D NPSH available too low
E Pump not up to rated speed
F Foreign matter in pump
G Air leaks in suction line
H Viscosity greater than rated
K Gas or vapour in liquid
L Speed too high
M Total head lower than rated
N Total head higher than rated
O Viscosity and/or specific gravity higher than rate
P Starved suction
Q Misalignment
R Worn or loose bearings
S Impeller blocked or damaged
T Bent shaft
U Improper location of discharge valve
V Foundation not rigid
W Bearings badly installed
X Pipes exert forces on pump
Y Vibration
Z Speed too high, check motor name plate