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The liquid contains air or steam. The liquid
produces foam.
Insufficient inlet pressure, with the
generation of cavitation and loss of
.
efficiency
Wear ring, wear pump casing or impeller.
The temperature of the liquid is close to
boiling point
NO FLOW
Causes
The pump is defused
Suction line blocked
The magnetic coupling decouples
The motor stopped
EXCESSIVE FLOW
Causes
Pag. 18/33
Check the presence of vortices in the suction line. Enter
some in the fuel tank to prevent the formation of vortices.
Install a tank of sufficient capacity in the suction line to allow
gas to drag
Increase the static height at the suction
Check that the intake is not blocked or are no bottlenecks.
Reduce the liquid temperature. Increase the diameter of the
intake pipes.
Reduce the length of inlet pipes. Open completely the inlet
valve. Check the viscosity of the liquid; refer to "technical
data" section of this manual, increase the temperature of the
liquid if necessary.
Check the condition of rotating ring wear and collar. Replace
if worn; refer to Chapter 10 of this manual
Reduce the liquid temperature
Remedies / actions
Re-prime the pump. Refer to section 3.5.1 of this manual.
Check for air leaks in the suction line
Ensure that there are no blind pipes, obstructed or valves
.
closed
Reduce the flow: partially close the discharge valve. Reduce
the density of the liquid, if possible. Reduce the prevalence
of the pump (check in advance with your distributor
M PUMPS PROCESS
inspect the inside in case this does not happen. Reduce the
engine power installed (check in advance with your
distributor
Check the power of the motor. Check the status of the
motor.
Remedies / actions
ISM0210
Instruction Manual of series SCE - Rev.03
.
.
). Make sure the pump turns freely;
M PUMPS PROCESS
). Adopt star-delta starting
.
.
.
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