Nocchi PVM 1-13 FM [6/12] English

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.

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