ProMinent EXtronic EXBb - Incorrect Hydraulic Installations; Suction Line and Siphon Issues

n A relief valve with a return into the storage tank is useful as
overload protection for the discharge line, for example install a
ProMinent
®
multifunctional valve.
n Use a pulsation damper to dampen pressure peaks with a
metering stroke with long discharge lines or increase the pipe
cross-section.
* Ventilation line with pressure vessels
PD Pulsation damper
7.4 How not to install
Fault description Cause Remedy
The suction line cannot
be bled.
A pocket of air (arrow) is in
the suction line.
Prevent the air pocket or install as shown in
Ä ‘Avoid exceeding maximum permissible oper‐
ating pressure’ on page 24 .
Fault description Cause Remedy
Feed chemical flows uncon‐
trolled when the line is filled.
Siphon effect by dis‐
charge line falling too
deeply.
Interrupt the discharge line, as in
Ä ‘With
high suction-side pressure 2’ on page 25
Avoid exceeding maximum permis‐
sible operating pressure
P_MOZ_0029_SW
Fig. 11
*
PD
P_MOZ_0001_SW
Fig. 12
P_MAZ_0009_SW
Fig. 13
P_MAZ_0010_SW
Fig. 14
Installation, hydraulic
24