ABB CEMcaptain GAA610-M, Руководство по эксплуатации

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86
GAA610-M
ADVANCED EMISSION GAS MONITORING SYSTEM | OI/GAA610-M-EN REV. B
… 13 Maintenance
SCC-F – Replacing the diaphragm and valve plates
When do the diaphragm and valve plates need to be replaced?
The diaphragm and valve plates in the diaphragm pump must be
replaced when the diaphragm pump no longer feeds gas
efficiently enough.
CAUTION
Risk of injury due to sample gas
The medium being fed may be corrosive and poisonous.
Residues from the gas that the pump has been feeding may
be found on the diaphragm and valve plates. These materials
can flow out when the diaphragm pump is opened.
• Take appropriate measures where needed to collect such
residues.
• Appropriate pre¬cautions must be taken.
1
Head cap
2
Head cap screws
3
Spacer plate
4
Structural diaphragm
5
Casing
6
Connecting rod
7
Valve plates
8
Sealing rings
9
Counter weight
0
Eccentric
k
Belleville spring
l
Distance ring(s)
Figure 52: Diaphragm pump
1. Activate the ‘Maintenance Mode’ on the control panel.
2. Turn off main switch.
Dismantle the diaphragm pumps:
3. Disconnect electrical connection
2
, loosen two hex socket
head screws
1
and remove mounting plate with the pumps
from the sample gas feed unit’s casing.
4. Take off the pump hoses and clean the outside of the pump.
Remove the pump head (see Figure 52):
5. Mark the head cap
1
, spacer plate
3
and casing
5
with a
felt pen. This prevents the possibility of these parts being
fitted incorrectly when the pump is reassembled later.
6. Undo the four head cover screws
2
and remove the head
cap along with the spacer plate from the pump casing.
Replace diaphragm (see Figure 52):
7. Move the structural diaphragm
4
by rotating the fan
impeller to its upper return point.
8. Hold opposite sides of the structural diaphragm, raise it, and
then remove it by rotating in a counterclockwise direction.
• During this procedure you should take care to ensure that
the Belleville spring
k
and the distance ring(s)
l
do not
fall from the structural membrane’s threaded bolt into
the casing.
9. Remove the Belleville spring
k
and distance ring(s)
l
from
the structural diaphragm’s threaded bolt and retain them.
10. Check all the parts for dirt and, if necessary, clean them with
a dry cloth or compressed air.
• Do not use solvents for cleaning as they can attack the
plastic parts.