Dover PSG Mouvex AZ O Instalación Funcionamiento y mantenimiento - Página 12
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6.3 Inversion
WARNING
The weight ot the parts
can be dangerous and
may provoke bodily inju-
ries
or material damages.
WARNING
Hazardous pressure
can cause
personal injury
or property damage.
WARNING
Hazardous or toxic
fluids can cause
serious injury.
WARNING
Dangerous voltage.
Can cause
injury and death.
NT 1003-A00 09 18 AZ O e
6. BYPASS (continued)
BE CAREFUL WITH THE WEIGHT OF
THE PARTS WHEN THEY ARE BEING
REMOVED.
FAILURE
TO
RELIEVE
SYSTEM
PRESSURE PRIOR TO PERFORMING
PUMP SERVICE OR MAINTENANCE
CAN CAUSE PERSONAL INJURY OR
PROPERTY DAMAGE.
IF PUMPING HAZARDOUS OR TOXIC
FLUIDS, THE SYSTEM MUST BE FLUS-
HED PRIOR TO PERFORMING ANY
SERVICE OPERATION.
DISCONNECT THE ELECTRICITY
SUPPLY BEFORE ANY MAINTENAN-
CE OPERATION.
Before commencing work, make sure that the pump
cannot be started up, even accidentally. Before opening
the pump, it must be drained and relieved of any pressu-
re it may contain. Take care to check that the isolation
valves, if any, are closed before pulling out the drain
plug 812 and its seal 848.
To reverse the bypass, remove the nut 808 and the set
of parts 805 - 806 - 807 - 809 and 810. Remove the
valve 803, its spring 804 and fit those parts on the oppo-
site side.
Fit the plug 812 and the seal 848 in the place of the nut
808.
6.4 Adjustment
WARNING
Hazardous pressure
can cause
personal injury
or property damage.
To adjust the bypass, unscrew the cap 810 and its seal
809, turn the adjustment screw 806 clockwise to increa-
se the discharge pressure, and anticlockwise to decrea-
se it. Once the adjustment is finished, do not forget to re-
screw the cap 810 and its seal 809.
Adjustment of the bypass is satisfactory when the flow
meets the pumps requirements and when the motor
bears the power increase due to the overpressure seen
upon closing the discharge. This is how the bypasses of
our pump units are adjusted, as a function of the infor-
mation provided by our Technical Services.
The pumps supplied bare shaft are delivered with a
standard bypass setting which needs to be adjusted with
the exact working conditions and installation, as per the
above described procedure.
12/19
Loading (bar)
Mini
Maxi
1,65
5
PUMPS OPERATING AGAINST A CLO-
SED VALVE CAN CAUSE SYSTEM
FAILURE, PERSONAL INJURY AND
PROPERTY DAMAGE.