Pentair PVM Serie Instrucciones De Funcionamiento página 6

ENGLISH
7.2 Others
(Only for PVM/PVMI/PVMX 1, 3, 5 series)
- For these pumps, it is advisable to open the bypass valve
during start-up. The bypass valve connects the suction
and discharge sides of the pump, thus making the filling
procedure easier. When the operation is stable, the by-
pass valve can be closed.
- If the pumped liquids contains air, it is advisable to leave
the bypass valve open if the operating pressure is lower
than 6 kg/cm². If the operating pressure constantly ex-
ceeds 6 kg/cm² the bypass valve must be closed. Other-
wise the material at the opening will be worn because of
the high liquid velocity.
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Aftapplug
Bypassventiel
8. MAINTENANCE
PVM/PVMI/PVMX Vertical Multistage Centrifugal Pumps
WARNING: Before starting maintenance work on the pump,
the motor, or other parts of the system, make sure that the
power supply has been switched off.
- The pump does not have a recommended maintenance
schedule.
- If the motor is fitted with grease nipples, then the motor
should be lubricated with a high temperature lithium-
based grease. If not, then the motor does not require re-
gular maintenance.
- If the pump and motor are used infrequently with long
intervals of non-operation, then we recommend that the
motor be greased.
- Coupling adjustment