Watson-Marlow DuCoNite 25 - Manual (Page 53)

TROUBLESHOOTING
53
Hose pulled into the
pump. Insufficient or no hose
lubricant in the pump head. Add extra lubricant. Refer
to §
7.5 .
Incorrect lubricant: no
Bredel Genuine Hose
Lubricant in the pump
head. Consult your Bredel repre-
sentative for the correct
lubricant.
Extremely high inlet pres-
sure - larger than 300 kPa. Reduce the inlet pressure.
Lubricant leakage at
flange bracket. Hose blocked by an incom-
pressible object in the
hose. The hose cannot be
compressed and will be
pulled into the pump hous-
ing. Remove hose, check for
blockages and replace if
necessary.
Bolts of flange bracket
loose. Tighten to the specified
torque settings. Refer to
§
10.1.7 .
Bolts of hose clamps loose. Tighten to the specified
torque settings. Refer to
§
10.1.7 .
Leakage from the rear of
the pump housing
"Buffer zone". Damaged sealing ring. Replace sealing ring.
Motor functions, but
rotor does not. Broken fracture surface on
rotor. Replace the rotor.
Extreme corrosion inside
the pump. When the pump tempera-
ture goes above 60 °C, the
corrosion speed can rise
excessively, depending on
the product. Lower the pump tempera-
ture, by using the pump
intermittently. Or mount a
temperature switch, to pre-
vent the pump temperature
from rising above 60 °C.
Problem Possible cause Correction