All bolted/screwed connections closing off the flameproof enclosure must be secured
with a thread-locking agent (Loctite Type 243).
7.5.2 Reassembling the pump section
7.5.2.1 Installing the mechanical seal
Observe the following points to ensure trouble-free operation of the mechanical
seal:
▪
Only remove the protective wrapping of the contact faces immediately before
assembly takes place.
▪
Make sure the surface of the shaft is absolutely clean and undamaged.
▪
Before the actual installation of the mechanical seal, wet the contact faces with a
drop of oil.
▪
For easier installation of bellows-type mechanical seals, wet the inside diameter
of the bellows with soapy water (no oil).
▪
To prevent any damage to the rubber bellows, place a thin foil (thickness
approximately 0.1 to 0.3 mm) around the free shaft stub.
Slip the rotating assembly over the foil into its installation position.
Then remove the foil.
✓
The shaft and rolling element bearings have been properly fitted in the motor.
1. Push drive-end mechanical seal 433.01 onto shaft 210 and secure it with taper
lock ring 515 or circlip 932.03.
2. Insert O-rings 412.04 or 412.35 and 412.15 or 412.11 into discharge cover 163,
and press them into bearing bracket 330 as far as they will go.
3. Push pump-end mechanical seal 433.02 onto shaft 210.
For special mechanical seals with covered spring, tighten the socket head cap screw
at the rotating assembly before fitting the impeller. Observe installation dimension
"A".
Table 23: Installation dimension "A"
Pump size
Installation dimension "A"
[mm]
40-250, 80-250, 100-250
29
80-251, 100-251, 150-251, 80-315/-316,
150-315, 200-315/-316, 100-316
38.5
100-401, 150-401, 151-401, 200-330,
200-400, 250-400/-401, 300-400/-401
48.3
7.5.2.2 Fitting the impeller
NOTE
For bearing brackets with tapered fit make sure that the tapered fit of impeller and shaft
is undamaged and installed free from grease.
A
Fig. 25: Installation
dimension "A"
7 Servicing/Maintenance
Amarex KRT
47 of 74
Goodnal STP ST041 Sewage Delivery (Amarex KRT Submersible Motor Pump) Vendor Manual
Q-Pulse Id VM362
Active 29/10/2013
Page 49 of 96
