GAS PURGE VALVE INSTALLATION
A gas purge valve is available to protect the pump
bearings against particulate and corrosive gases
that could move into the pump.
To install the gas purge valve it is necessary to un-
screw the purge port cover as shown in the follow-
ing figure,
and then screw the gas purge valve (with a torque
of 2.5 Nm) as shown in the following figure.
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.
Unscrew the threaded plug (see figure below).
Screw the vent valve into the pump inserting the
supplied adapter between the valve and the pump.
32
TECHNICAL INFORMATION
87-900-878-01(C)
