Dover PSG Mouvex AF HT Експлуатація та технічне обслуговування установки - Сторінка 13
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6.3 Inversion
WARNING
BE CAREFUL WITH THE WEIGHT OF
THE PARTS WHEN THEY ARE BEING
REMOVED.
The weight ot the parts can
be dangerous and may
provoke bodily injuries or
material damages.
WARNING
FAILURE TO RELIEVE SYSTEM PRESSURE
PRIOR TO PERFORMING PUMP SERVICE
OR MAINTENANCE CAN CAUSE PERSONAL
INJURY OR PROPERTY DAMAGE.
Hazardous pressure
can cause
personal injury
or property damage.
WARNING
IF PUMPING HAZARDOUS OR TOXIC
FLUIDS, THE SYSTEM MUST BE FLUSHED
PRIOR TO PERFORMING ANY SERVICE
OPERATION.
Hazardous or toxic
fluids can cause
serious injury.
WARNING
DISCONNECT THE ELECTRICITY SUPPLY
BEFORE ANY MAINTENANCE OPERATION.
Dangerous voltage.
Can cause
injury and death .
NT 1003-D00 09.12 AF HT e
6. BYPASS (continued)
13/18
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 434 and its seal 412.
To reverse the bypass, unscrew the nuts 815 on the
studs 813, remove the washers 814 and turn the bypass
through 180°.
Before locking the bypass in its new position, check the
condition of the seals 877 and their installation.
Tighten the nuts on the studs, taking care to balance the
tightening so that the bypass remains vertical.
6.4 Adjustment
WARNING
PUMPS OPERATING AGAINST A CLOSED
VALVE CAN CAUSE SYSTEM FAILURE,
PERSONAL INJURY AND PROPERTY
DAMAGE.
Hazardous pressure
can cause
personal injury
or property damage.
To adjust the bypass, unscrew the cap 833 and its seal
832, turn the adjustment nut 834 clockwise to increase
the discharge pressure, and anticlockwise to decrease
it. Once the adjustment is finished, do not forget to re-
screw the cap 833 and its seal 832.
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 stan-
dard bypass setting which needs to be adjusted with the
exact working conditions and installation, as per the
above described procedure.
Loading (bar)
Mini
Maxi
0,8
5,6