Watson-Marlow Bredel 265 - Manual (Page 69)

TROUBLESHOOTING
69
Vibration of the
pump and pipe-
work. Suction and discharge
lines are not secured cor-
rectly. Check and secure pipework.
High pump speed with long
suction and discharge lines
or high relative density or a
combination of these fac-
tors. Reduce pump speed.
Reduce the line lengths on both
suction and discharge where pos-
sible. Consult your Bredel repre-
sentative for a recommendation.
Too narrow diameter of
suction and/or discharge
line. Increase the diameter of the suc-
tion/discharge lines.
Rotors are not correctly
aligned. Align the rotors in relation to each
other at an angle of 90 degrees.
Broken front
cover bolts. Pump cover (dis)mounted
with the hose in the pump. Never (dis)mount the pump cover
when the hose is still in the pump.
Short hose life. Chemical attack of the
hose. Check the compatibility of the hose
material with the product to be
pumped. Consult your Bredel rep-
resentative for correct hose selec-
tion.
High pump speed. Reduce pump speed.
High discharge pressures. Maximum working pressure
1600 kPa. Check that the dis-
charge line is not blocked, the
shut-off valves are fully opened
and the pressure relief valve func-
tions properly (if present in the dis-
charge line).
High product temperature. Consult your Bredel representative
for correct hose selection.
High pulsations. Restructure the discharge and inlet
conditions.
Problem Possible cause Correction