Problem Possible cause Correction
Short hose life.
Chemical attack of the hose.
Check the compatibility of the
hose material with the product
to be pumped. In case of doubt,
consult your Bredel
representative.
High pump speed. Reduce pump speed.
High discharge pressures.
Maximum working pressure
depends on the hose type.
Check that the discharge line is
not blocked, the shut-off valves
are fully opened and the
pressure relief valve functions
properly (if present in the
discharge line).
High product temperature.
In case of doubt, consult your
Bredel representative.
High pulsations.
Restructure the discharge and
inlet conditions.
Hose pulled
into the pump.
Insufficient or no hose lubricant in the
pumphead.
Add extra lubricant. Refer to
"Changing lubricant" on
page 45.
Incorrect lubricant: no Bredel Genuine Hose
Lubricant in the pumphead.
In case of doubt, consult your
Bredel representative.
Extremely high inlet pressure - larger than 300
kPa.
Reduce the inlet pressure.
Hose blocked by an incompressible object in the
hose. The hose cannot be compressed and will
be pulled into the pump housing.
Remove hose, check for
blockages and replace if
necessary.
Poor suction conditions, highly viscous flow, or
flow with high solid content.
Attach a second hose clamp per
hose end. This hose clamp must
be tightened to the maximum
value. Refer to "Tightening the
hose clamps" on page 54.
m-bredel-25-32-en-05 79
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