Amarex
N
25
7.5.3
Fitting the mechanical seal
Please observe the following when fitting the mechanical seal:
- Extreme care and cleanliness are of utmost importance.
- The surface of the shaft must be absolutely clean and un-
damaged.
- Before reassembly, the contact faces shall be wetted with a
drop of oil. When sliding on the mechanical seal, wet the in-
side diameter with soapy water (no oil) and protect the mech-
anical seal from damage.
Fitting the motor-end mechanical seal:
To prevent damage to the rubber bellows by the shaft recess,
place a thin foil (approx. 0.1
…
0.3 mm) around the free shaft
stub. Slip the rotating assembly over the foil into its installation
position. Then remove the foil.
7.5.4
Fitting the S-type impeller
After installation of the pump-end mechanical seal 433.02:
1. Slip the impeller onto the shaft end
2. Place grooved pin 561 into the impeller
3. Place impeller body 23-7 onto the centering hub
4. Screw in impeller screw 914.04 by hand
5. Tighten the screw (tightening torque 30 Nm)
6. Mount ring 500 with screws 914.06 in suction cover 162
7. Measure dimension x on the suction cover
8. Measure dimension y between the front face of the impeller
and the pump casing
9. The difference between dimension x minus clearance di-
mension S and dimension y, i.e. adjusting dimension h
must be set with screws 904.
10. Tighten the suction cover with screws 914.03. Clearance di-
mension S = 0.3
"
0.1 results automatically.
This adjusting dimension is only valid if
the rotor assembly is pulled towards the
suction side until it will not go any further. This operation
shall be performed carefully using an appropriate jig; the
rotor must be held in this position until dimension “ x ”
has been measured and adjusted.
2563:114
Amarex
N S 50
7.5.5
Tightness test of oil reservoir
(YL and WL models only)
Procedure:
- Use the oil filler opening for tightness testing.
- Screw the testing device tightly into the oil filler opening.
- Test medium: compressed air, max. 0.5 bar.
- Test period: 2 min.
- The pressure must not drop during the test period.
2563:115
7.5.6
Filling the oil reservoir (YL and WL models only)
See section 7.2.4.
7.6
Spare parts stock
For explosion-proof units only marked original spare
parts supplied by the manufacturer of the pump unit
shall be used.
When ordering spare parts please always quote the follow-
ing data stated on the name plate.
Pump type:
e.g. Amarex N F 100-220/044YLG-195
Works No. / ident. No. and series No.:
7.6.1
Recommended spare parts stock for 2 years’
operation as per VDMA
Part
No.
Description
Number of pumps
(incl. stand-by pumps)
2 3 4 5 6 8
10 and
more
230 Impeller
1 1 2 2 3 4
50 %
321 Rolling element bearing,
motor end
1 1 2 2 3 4
50 %
321 Rolling element bearing,
pump end
1 1 2 2 3 4
50 %
433 Mechanical seal
motor end
2 3 4 5 6 7
90 %
433 Mechanical seal
pump end
2 3 4 5 6 7
90 %
Set of sealing elements 4 6 8 8 9 10 100 %
7.6.2
Spare parts set
(39 080 091)
The following parts are available as a set for the complete type
series:
- 1 rolling element bearing 321.01
- 1 rolling element bearing 321.02
- 1 mechanical seal 433.01
- 1 mechanical seal 433.02
- 1 set of sealing elements
- 1 set of fasteners
Caution
Q-Pulse Id: VM41
10/05/2011
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