Re-Assembling Of Pump Head; Assembly Into A Circuit; Maintenance - Levitronix PuraLev i100MU User Manual

4 Screws M3x14mm
M3
(Screws M1-M4 for fixation of
pump head on motor)
P4
M1
P2
Figure 35: 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 Figure 35. Use 4 sequences with
incremental torque steps in order to avoid to fixing the
pump head asymmetrically to the motor.
Sequence 1:
Sequence 3-4:
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 cavity
(see Figure 33).
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
numbered in Figure 35. To avoid an asymmetric lid to
PL-4075-00, Rev02, DCO# 20-275
6 Screws M4x15mm
(Screws P1-P6 for
fixation of pump housing)
P6 P1
M2
Serial # of
Pump Head
P3
P5
M4
10 Ncm
15 Ncm (Max. torque)
User Manual for PuraLev
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.
Circular uniform gap of
approximately 1.5mm
Figure 36: 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.
®
i100MU
www.levitronix.com
6 Screws M4x15mm
(Screws P1-P6 for
fixation of pump housing)
Tightened with 30 cNm
38