Richter MNKA-B Series (ASME) - Manual (Page 16)

Installation and Operating Manual
Series MNKA-B, acc. to ASME/ANSI
9250-055-en Revision 01
TM 5976 MPE/Wm Page 16 Edition 10/2004
7.8.3 Assembly of slide-in unit
Introduce can insert into the can (containment
shell). If this is not possible, cool can (containment
shell) insert to approx. 41 °F (5 °C).
Place intermediate ring 509/1 in the bearing
pedestal 330.
Insert the entire unit into the lantern 344.
7.8.4 Perform trial assembly of the plain
bearing pedestal with impeller,
inner magnet assembly and plain
bearings
Without adhesive
Without O-ring 412/3.
Install bearing bushes 545/1 and 545/2 and press
in firmly.
Push on bearing sleeve 529/1 on the impeller side
and install this unit in the plain bearing pedestal
339. Make sure that the cams of the anti-torsion
insert engage properly in the impeller.
Push distance ring 504 and bearing sleeve 529/2
onto the pump shaft.
Push inner magnet assembly 859 onto the pump
shaft.
Permit the anti-torsion cams of the pump-side
bearing sleeve 529/1 to engage in the grooves of
the impeller.
Screw on inner magnet assembly 859 together
with the bearing sleeve and tighten.
7.8.5 Checking bearing play Z and
impeller distance X
The distances X, Y and Z are indicated in the works
certificate. See also drawing in Section 9.1.
X:
Distance behind the impeller
Y: Distance in front of the impeller
Z: Axial play of the plain bearings
Press inner magnet assembly towards the
impeller.
Measure distance X
1
behind the impeller.
Press impeller towards the motor.
Measure distance X
2
behind the impeller.
Z = X
1
- X
2
Are the values correct?
These values must be checked after final assembly.
7.8.6 Final assembly
Dismantle trial assembly for determining the bearing
play again and perform the final assembly.
With the O-ring 412/3
With the distance ring 504
With 1 drop of adhesive on the shaft thread e.g.
Loctite 243 from Loctite or an equivalent.
Only one drop of the adhesive is to be applied per
thread.
Otherwise the next dismantling operation will be more
difficult or no longer possible without destroying
components.
Install plain bearing pedestal 339 and tighten hex.
screws 901/5.
Strong axial forces are again produced when
the completely assembled plain bearing
pedestal is inserted into the lantern.
Push the entire slide-in unit with housing (casing)
gasket 401 into the housing (casing) 100 and
screw together with hex. screws 901/3.
When tightening the housing screws 901/3, make sure
that the support bracket of the adapter (with motor
group 140TC) is in contact.
For tightening torques, see Section 1.2.
7.9 Tests
The pumps are tested with water at the
manufacturer's.
The operating data measured are documented in a
works certificate.
If, during a test after repairs, discrepancies compared
with the works certificate are discovered, the following
people can be called in:
1) in-house pump office
2) The manufacturer ITT Richter
or its local agent
The following conveying data can be checked using
the pump performance curves:
Flow rate
Head
Power requirement
NPSHR