Dover PSG Mouvex AZ O Installazione Funzionamento e manutenzione - Pagina 10
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5.1 Operation
The shaft 501 with the driver 641 drive seal housing 612,
spring 615, spring guide 614 and seal 613.
Stationary seal face 604 is holden in pump body by seal
605.
Sealing is done :
• on the shaft, by the seal 613 rotating with it,
• by the surfaces in contact between the rotating seal
housing 612 and the static stationary seal face 604,
• in the bore of the pump body by the seal 605 tighte-
ned between the stationary seal face 604 and the
washer 608.
Sealing is therefore done as a function of the stationary
seal face condition of these contact surfaces and the
seals 605 and 613.
5.2 Disassembly
WARNING
Dangerous voltage.
Can cause
injury and death.
WARNING
Hazardous pressure
can cause
personal injury
or property damage.
NT 1003-A00 09 18 AZ O e
5. MONODIR MECHANICAL SEAL
DISCONNECT THE ELECTRICITY
SUPPLY BEFORE ANY MAINTENAN-
CE OPERATION.
FAILURE
TO
RELIEVE
SYSTEM
PRESSURE PRIOR TO PERFORMING
PUMP SERVICE OR MAINTENANCE
CAN CAUSE PERSONAL INJURY OR
PROPERTY DAMAGE.
WARNING
Hazardous pressure
can cause
personal injury
or property damage.
WARNING
Hazardous or toxic
fluids can cause
serious injury.
Before opening the pump, you must always drain it and
release the pressure it may contain. Make sure that the
isolation valves, if any, are closed or drain the installation
before pulling out the drain plug 812 and its seal 848.
After opening the pump :
• remove screws 706 and washers 721.
• remove the cover 705 with its seal 707.
• release shaft by tapping with a mallet on opposite
shaft end.
• remove the ring 704 and the washer 731. Then, by
tapping on shaft end, drive side, the set : bearing
cage 701, bearing 703 and protection circlip 733.
• remove the washer 608, the seal 605, the stationary
seal face 604 and the set : seal housing 612, seal
613, guide 614, spring 615 and driver 641.
5.3 Reassembly
Check the good condition of the seals 707, 605 and 613.
Check the surfaces in contact of the stationary seal face
604 and the seal housing 612 are flat and mirror smooth.
Replace all parts on shaft in the reverse order and install
ring 704.
Replace shaft with ball bearing and mechanical seal on
the pump, making sure one of the drain vents is turned
downwards.
Install the cover 705 and its seal 707 (taking care not to
damage the lip of this seal with the groove of the shaft
keying) and the screws 706 with their washer 721.
10/19
DISCONNECTING THE FLUID OR
PRESSURE CONTAINMENT COMPO-
NENTS DURING PUMP OPERATION
CAN CAUSE SERIOUS PERSONAL
INJURY, DEATH OR MAJOR PROPERTY
DAMAGE.
IF PUMPING HAZARDOUS OR TOXIC
FLUIDS, THE SYSTEM MUST BE FLUS-
HED PRIOR TO PERFORMING ANY
SERVICE OPERATION.