Trouble Shooter's Guide - Brinkmann BFS Series Operating Instructions Manual

9 Trouble shooter's guide

Fault Possible causes
Pump does not pump Incorrect direction of rotation of pump
Pump is operating without fluid
Shut-off valves are closed
All fluid is pumped through a bypass
line
Broken pressure relief valve
Pump is blocked
Pump does not de- No possibility for de-aeration provided
aerate
Pump does not ope- Suction line is leaking
rate at full capacity
A bypass is in open
Suction pipe too close to tank bottom
Upstream or downstream filters
clogged
The pump is worn out
Pump is operating Suction line is leaking; pump is draw-
loudly ing air
The suction height is greater than
1.2 m and/or the total input pressure is
< 0.8 bar.
Pump is cavitating because the
temperature of the pumped liquid is
too high.
System pressure is too low
Incorrect opening and closing se-
quence of the suction side valves
Air pockets or air entrainment in the
pumped medium or pump sucks air.
Resistance in suction line too high
Suction pipe too close to tank bottom
Fluid viscosity too high
The pump is worn out
Upstream or downstream filters
clogged
Auxiliary equipment causes noises
Inline pump is leaking The ring seal is worn out or soiled
: Will result in immediate pump damage or hazards
BE6100
Remedy
Reverse direction of rotation of motor.
Add pumping fluid; raise fluid level in tank.
Open valves
Check bypass lines and relief valve settings.
Replace pressure relief valve, check pressure.
Exchange pump immediately. Do not turn the motor
on again!
Send the pump to the manufacturer to be repaired.
Install air relief valve in the discharge line or start up
pump with de-energized relief valve.
Tighten the flange screw fittings and replace seals.
Check the piping and correct the bypass / leakage.
Use Brinkmann suction protector; shorten suction
pipe; cut suction pipe at 45 degree angle
Clean or replace filter.
If necessary, improve the filtration. If you are familiar
with the equipment, exchange the spindle set.
Otherwise, send the pump to the manufacturer.
Tighten fittings and pipe connections; replace seals
or gaskets in suction line if necessary.
Raise fluid level in tank or lower pump.
Increase the supply or inlet pressure.
Lower the temperatur of the pumped liquid.
Consult with the manufacturer.
Check the size of the primary pressure pump.
Correct the valve opening sequence so that the
pump only starts when the valve is open. Only close
the valve when the pump no longer rotates. In
general, avoid suction side valves.
Ensure that air is discharged better in the container.
Check the proper seal/connection of the suction pipe.
Increase suction pipe diameter; check for restrictions
(elbows etc.)
Use Brinkmann suction protector; shorten suction
pipe; cut suction pipe at 45 degree angle
Feed screw pump by secondary feed pump after
consulting with the manufacturer
If necessary, improve the filtration. If you are familiar
with the equipment, exchange the spindle set.
Otherwise, send the pump to the manufacturer.
Clean or replace filter
Noises can also arise as a result of defective pres-
sure relief valves, an unfavourable path taken by the
pipework or a lack of ventilation. Establish the source
of the noise and eliminate the root cause.
Otherwise, send the pump to the manufacturer in
order for it to be repaired. Check the equipment for
hydraulic shock and suction side negative pressure
when switching. If necessary, improve the filtration.
Edition 08/2018 Page 10 of 13