Ruhrpumpen API 610 - Page 133

J Line Pump
Horizontal Double Suction Centrifugal Pump – API 610 Process Pump
133 V1.032818
TROUBLE
PROBABLE CAUSES
SUGGESTED SOLUTION
CAPACITY OR
DISCHARGE
PRESSURE LOW
a. Air leaks into suction
b. Speed too low
c. Clogged suction
d. Clogged impeller
e. Damaged impeller
f. Wrong rotation
g. Pump or piping are not
properly vented
h. Feed pipe or impeller
plugged
i. Formation of air
pockets in the piping
j. Inner pump parts are
worn
k. Density or viscosity of
pumped fluid is not same
as designed.
l. The motor voltage is
incorrect
m. Motor connected only
in two-phase mode
n. NPSHa too low
a. Check suction line for leaks.
b. Check driver and its power source.
c. Clean out suction line.
d. Clean impeller.
e. Replace impeller.
f. Check driver rotation.
g. Vent or top up.
h. Clean pipe and impeller.
i. Install vent valve or lay piping elsewhere.
j. Change worn parts.
k. Consult a Ruhrpumpen dealer.
l. Apply correct voltage to the motor.
m. Check the cables, connections and fuses.
n. Check the fluid level in the feed container.
Open suction valve completely.
Lay suction pipe elsewhere if friction losses are too
big.
Check for a possible filter in the feed pipe.
DRIVER
OVERLOAD
a. Density or viscosity of
pumped fluid is not same
as designed.
b. Speed too high
c. Pump unit is not
properly aligned
d. Pump is under tension
e. The motor voltage is
incorrect
f. Motor connected only
in two-phase mode
g. Bearings are damaged
h. System head lower
than rating
a. Consult a Ruhrpumpen dealer.
b. Decrease driver speed.
c. Realign the pump.
d. Check the piping for tension free connections.
e. Apply correct voltage to the motor.
f. Check the cables, connections and fuses.
g. Change damaged bearings.
h. Check suction and discharge pressure.
Set operating point with the discharge valve.