User Manual for PuraLev
®
200MU
www.levitronix.com
PL-4031-00, Rev07, DCO# 20-144
32
Figure 34: Screws of pump head (Stainless Steel INOX A4)
6.3.4 Insertion and Fixation of New Pump Head
Assure that on the new pump head the
Fixation Disk
is
not attached anymore. Then insert the pump head
smoothly into the motor. Rotate it until the pump head
holes and the motor threads are aligned.
6.3.5 Fixation of New Pump Head to Motor
Tighten the
4 M3x14mm Screws M1
to
M4
the order as
numbered in
. Use 4 sequences with
incremental torque steps in order to avoid to fixing the
pump head asymmetrically to the motor.
Sequence 1:
10 Ncm
Sequence 3-4:
15 Ncm (Max. torque)
6.3.6 Start-Up and Functionality Check
Start up the system and check if the impeller is rotating
properly. If the pump is not operating as expected make
sure that the metallic
Fixation Disk
or another magnetic
part has not accidentally attached itself to the bottom of
the pump head
.
6.4 Re-Assembling of Pump Head
If possible avoid to disassembling the pump head. If this
can not be avoided, for example due to cleaning
reasons, use the following instructions to reassemble a
pump head.
6.4.1 Insertion of Impeller and Sealing Gasket
Insert the
Impeller
into the
Housing Bottom
and then
insert the
Triclamp
Sealing Gasket
into the relevant
6.4.2 Press the Lid into the Housing Bottom
Press the
Housing Lid
in to the
Housing Bottom
. Do not
use the pump screws for doing this.
6.4.3 Tighten the Pump Head Screws
Tighten the
6 M4x15mm
Screws
P1
to
P6
in the order as
. To avoid an asymmetric lid to
bottom alignment Use 4 sequences with torque
increments until each screw is tightened with
30 Ncm
.
Sequence 1:
10 Ncm
Sequence 3-4:
30 Ncm (Max. torque)
6.4.4 Final Assembly Check
Check the uniformity of the gap between lid and bottom
and that all screws are tightened properly.
Figure 35: Cross-section of pump head with check points
6.5 Assembly into a Circuit
The following points shall be considered, when
integrating the pump head into circuit.
6.5.1 Usage of Fixation Disk
During handling, assembling and transportation of the
pump head with the hydraulic circuit it is recommended
to attach the
Fixation Disk
to the pump head bottom.
This fixes the impeller mechanically and reduces the
magnetic fields, which can attract other magnetic parts
during handling, sterilization and transportation.
6.5.2 Careful Handling of Multiple Pump Heads
Take care to the magnetic forces of the impellers
when handling multiple pump heads at the same
time. Avoid two pump heads coming together with force
due to the magnetic attraction, which might cause
cracks.
6.5.3 Avoidance of Mechanical Stress
Do not apply too much bending forces to the fittings. It is
recommended to use 3 way clamps (not 2 way) to attach
stainless steel Triclamp fittings. This reduces the
tendency to distort the fittings due to different expansion
coefficients of plastics and steel.
6.6 Maintenance
6.6.1 Check of Pump Head Screws
From time to time and specifically after heat treatments
like steam sterilization or autoclaving it is recommended
to check if the 6 pump head screws still are screwed on
properly in order to assure proper sealing of the pump
housing.
6.6.2 Check of Sealing Property
The pump head design has recesses between lid and
bottom, which allow to seeing leakages immediately.
Regularly check these recesses for liquid leakage.
4 Screws M3x14mm
(Screws M1-M4 for fixation of
pump head on motor)
6 Screws M4x15mm
(Screws P1-P6 for
fixation of pump housing)
M1
M2
M3
M4
P1
P3
P2
P4
P6
P5
6 Screws M4x15mm
(Screws P1-P6 for
fixation of pump housing)
Tightened with 30 cNm
Circular uniform gap of
approximately 1.5mm
Serial # of
Pump Head