Dover PSG Mouvex AF HT Installation Operation & Maintenance - Page 10
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5.1 Operation
Shaft 501 drives the rotating part 697 of the mechanical
seal in a rotary motion.
The stationary seal face 604 of the seal is fixed in the
mechanical seal holder 701 with the stopper 627.
Sealing is done with the mechanical seal 600a :
• on the shaft by the rotating part seal ,
• by the mating surface between the rotating part and
the fixed part,
• in the bore of the mechanical seal holder 701 by the
fixed part seal.
Sealing is therefore done as a function of the condition
of these contact surfaces and the seals.
Before starting up the pump, it is essential to bleed air
from the mechanical seal holder 701 via the plug 738
(the air is replaced by the product being pumped or a
compatible product).
5.2 Dismantling
WARNING
DISCONNECT THE ELECTRICITY SUPPLY
BEFORE ANY MAINTENANCE OPERATION.
Dangerous voltage.
Can cause
injury and death .
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.
NT 1003-D00 09.12 AF HT e
5. MECHANICAL SEALS
10/18
WARNING
DISCONNECTING THE FLUID OR PRES-
SURE CONTAINMENT COMPONENTS
DURING PUMP OPERATION CAN CAUSE
SERIOUS PERSONAL INJURY, DEATH
OR MAJOR 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.
Before opening the pump, make sure the pump has
been drained and take the necessary precautions to pre-
vent it from starting up.
It must not be possible to start it up, even by accident.
The pump must be at ambient temperature.
After opening the pump (see § 4.) :
• Remove the screws 776 on the pump side.
• Take out the mechanical seal holder 701 and bearing
736 assembly with the shaft 501 by tapping with a mal-
let on the end of the shaft 501 opposite the drive end.
• Remove the screws 706, the cover 705 and the circlips
704.
• Remove the screws 776 from the drive end.
• Use an extractor to take out the assembly of the
mechanical seal holder 701, bearing 732, protection
733, the washer 731 and fixed part of the mechanical
seal 600a.
• Remove the screws from the rotating part of the mecha-
nical seal 600a and separate it from the shaft 501.
• Remove the fixed part of the mechanical seal 600a
from the mechanical seal holder 701.