Watson-Marlow PD/40 - Manual (Page 17)

17
7 TROUBLESHOOTING
If the pulsation damper does not function (correctly), consult the following checklist to see if you can
remedy the problem yourself. If you cannot, please contact your Bredel representative.
Problem Possible cause Solution
(Heavy) vibration of
Pump, Pulsation
damper or pipework Pressure inside vessel
too low Pressurize the vessel of pulsation
damper again according
paragraph
5.5 Setting the pulsation damper pressure
level for operation.
Pressure inside vessel
too high
Product leakage Not all parts have been
greased properly. Grease all necessary parts. See also
paragraph 6.3 Replacing the pulsation
damper hose.
Pressure loss at
pulsation damper
housing Damaged O-ring (pos.
4 or 5) Replace the O-ring concerned.
Pressing ring (pos. 7)
incorrectly mounted Tighten to the specified torque settings
(see paragraph 8.2 Torque values)
Short pulsation
damper hose life Chemical corrosion of
the hose Check the compatibility of the hose
material with the product to be pumped.
Consult your Bredel representative for
correct hose selection.
High discharge
pressures Maximum operating pressure is 1600 kPa.
Check whether the discharge line is
blocked. Make sure the shut-off valves are
fully opened and the pressure-relief valve
(if present) in the discharge line is
functioning properly.
High product
temperature Consult your Bredel representative for
correct pulsation damper hose selection.
High pulsations Restructure the discharge and inlet
conditions.