Richter SCK-S - Manual (Page 9)

Series MNK-S, MNK-SB, SCK-S, “Self-priming“ design Page 9
9230-062-en Revision 02
TM 6566 Edition 08/2006
6 Maintenance
6.1 Notes on dismantling
All repair and maintenance work is to be performed by
skilled staff using appropriate tools and original spare
parts.
Is the necessary documentation available?
Has the pump been taken out of operation, evacuated
and flushed correctly?
See also Section 5.2.
Dismantling and assembly of the pump are performed
in accordance with the relevant installation and oper-
ating manual.
6.2 Slide-in unit
Depending on the slide-in unit, the applicable mainte-
nance and repair instructions of the MNK, MNK-B or
SCK are to be observed.
6.3 Emptying
To empty the self-priming pump, the two hex. nuts
920/1 of the blind cover 122 are to be removed and
the blind cover 122 dismantled with the centering
gasket 415. The capacity of the pump housing 101 is
max. 17 litres. Any medium still remaining in the pipes
must also be allowed for. A collecting container of
appropriate size is to be provided.
Take care with hazardous media.
As with normal-priming pumps, Richter offers a transi-
tion pipe which can be installed instead of the blind
cover. In this way the medium can be drained into a
closed pipe system without any risk.
6.4 Cleaning
The self-priming pump is not suitable for conveying
solids-laden media. Should, nevertheless, solids enter
the pump, they settle on the bottom of the pump hous-
ing 101. The draining cover 169 can be taken off and
the solids removed, see Section 6.5.4.
6.5 Dismantling
6.5.1 Slide-in unit and impeller
If the slide-in unit including the impeller is to be
dismantled, the pump housing 101 can remain con-
nected to the piping.
If the coupling connected to the motor is a spacer-
type coupling, the motor can also remain installed.
Undo the hex. screws between the slide-in unit and
the volute housing 102 and pull out the slide-in unit
including the impeller.
6.5.2 Volute housing
The volute housing 102 can be removed after the
slide-in unit has been dismantled. Then the hex.
screws 901/22 connecting the volute housing 102 to
the pump housing 101 must be undone. The inlet
ring 131 and the stud 560/2 are dismantled at the
same time as the volute housing 102.
6.5.3 Seat
To be able to dismantle the seat 585 and the cap
580, the pump must first be separated from the suc-
tion pipe. The hex. screws 901/20 between the feed
elbow 139 and the pump housing 101 must be un-
done. Now the entire unit comprising the feed elbow
139, seat 585 and cap 580 can be pulled out. When
doing so, turn the feed elbow 139 though 90° so that
the entire unit passes through the opening in the
pump housing 101.
Now the seat 585 can be pulled out of the feed el-
bow 139. The cap 580 can be unscrewed from the
seat 585.
When assembling this unit, make sure that the seat
is not turned in the feed elbow when introducing the
feed elbow into the pump housing.
The opening of the seat must face vertically down-
wards when installed.
6.5.4 Draining cover
The draining cover 169 can be removed after undo-
ing the hex. screws 901/21 connecting it to the pump
housing 101.