INLET SCREEN INSTALLATION
The inlet screens mod. 969-9308 prevents the
blades of the pump from being damaged by debris
greater than 2 mm diameter.
The inlet screen, however, will reduce the pump-
ing speed by about 15%.
The inlet screen is fitted in the upper part of the
pump, as shown in the figure.
The screen can be mounted on each pump model.
The following figure shows the overall flange di-
mensions with the protection screen fitted on
pump with ISO flange.
VENT VALVE INSTALLATION
The vent valve mod. 969-9833 allows to avoid un-
desired venting of the pump during a temporary
power failure (5 sec maximum), and enables an
automatic vent operation.
Fix the vent valve to the vent port of the pump as
shown in the figure of the following paragraph.
28
TECHNICAL INFORMATION
87-900-838-01(B)