Nordson ASYMTEK Manual
Nordson Asymtek
Mini and micro dispensing solutions for fluids and pastes
page 1 off 20
Installation and Service
Manual for
ASYMTEK Mixing unit
aCCura-Mix-Mini 1 / L with integrated control
v.01
Nordson Asymtek
Mini and micro dispensing solutions for fluids and pastes
page 2 off 20
1 INTRODUCTION
Dear ladies and gentlemen!
First of all, we would like to gratulate you for buying ASYMTEK products, allowing
you to work with the latest technology. To be able to avoid malfunctions, some
important criteria now follows for commissioning your ASYMTEK product and the
servicing afterwards. Furthermore, we see it as our utmost duty to inform you about
possible dangers in accordance with the operation of your new pump.
Therefore, please note, that this manual needs to be within the near of your service
and other related personnel during, before and after operation of the pump.
We emphasise the need for reading this manual carefully and would like to point out,
that important notices relating your security will follow within the next pages of this
manual.
Understanding all notices and the technology related information allow you to operate
your latest ASYMTEK product without endangering yourself and others.
We wish you success and all the best with your newest ASYMTEK Dosing product.
The ASYMTEK dosing team
Nordson Asymtek
Mini and micro dispensing solutions for fluids and pastes
page 3 off 20
1.1 Use compliance
Before operation, please carefully read the following
1. Please intensively study this manual before commissioning. Do get familiar with the
operation manual before each start of the pump or every time when the operator changes.
2. Please note, that this manual is part of this particular pump even when being moved to
another department or company.
3. The pump may only be used by healthy people
4. Do only use ASYMTEK spare parts. Damages caused by using other parts are not
supported by the ASYMTEK warranty.
5. Should any of this manual not be clear or understandable, please do contact your
distributor or write ASYMTEK.com.
This pump is a self-priming endless dosing pump. Following materials may be used with it for
metering or transferring:
• Adhesives and sealants with or without spheres
• Material resistant fluids and pastes
• Oils and lubricants
• Paints and lacquers
Do not use with cyanoacrylates, anaerobic glues or any explosion rated nor poisonous
products. Please do contact your distributor for further information. We are not chemical
specialists so please do check the pump material resistance of all wetted parts with your
product supplier. Any improper use will produce the loss of the support of the ASYMTEK
warranty.
Explicit compliance for the pumped material:
Depending on the application, the maximum temperature may not succeed 120°C. With the
use of aggressive products, please do always contact your distributor and product supplier to
get approval before operation and or commissioning.
Make sure, that the local legislation has been incorporated all safety relevant demands are
being kept.
Changes done by the user result in loss of warranty. All damage claims upon will be ignored.
All safety relevant technical issues lose the ASYMTEK warranty support.
All rights reserved. This manual may not be duplicated without written agreement of the manufacturer.
This sign shows a safety relevant message. Make sure all
operator personnel and safety people take note or have been
made aware.
Nordson Asymtek
Mini and micro dispensing solutions for fluids and pastes
page 4 off 20
1.2 Safety instructions
Make sure, that you have taken care of the rules for accident prevention next to
reading this manual.
Do not disregard any caution sign; they give important notices to prevent accidents or
injuries. Caution signs are an important part of the safety rules for accident prevention
therefore need to be visible at l times.
Before commissioning, please do check all screws and see if they are well tightened.
Before starting to work with the pump, every worker needs to fully understand the
application and its demands. Do not let the pump run without any supervision.
Service and repairs may only be performed via trained personnel and the relevant
tools.
All needed accident prevention apparatus and fixtures must be installed before
operation. Make sure they are in good condition at all times.
Make sure that the pressure in the system has been neutralized while servicing the
pump. Switch off the power.
In case solvents are used, it may be needed to wear breathing protection masks.
Please ask your safety staff.
Never smell at openings after demounting the pump!
Take the needed precautions when working in an explosion proof zone!
Smoking is prohibited in the near of solvents and other inflammable products.
Only work on the pump and the pump drive shaft when the power is off.
Do not let the pump dry run.
Make sure that the suction side connection is vacuum proof and that the connection
of the pressure side is able to withstand the system pressure.
Do not use demineralised water.
Nordson Asymtek
Mini and micro dispensing solutions for fluids and pastes
page 5 off 20
2. Technical description, function and assembly
Basically, all ASYMTEK pumps can be used for dosing or transferring (pumping) or emptying
applications:
Dosing Pumping (Transfer) Emptying
ASYMTEK pumps in general can be used in two directions: Clockwise or Counter Clockwise.
Furthermore, the position/angle of the pump almost does not have any effect on the pumping
or dosing result. Only in some cases, the suction performance can be influenced by it.
Suction
Pressure*
Suction
Suction
Druckseite*
Pressure
Stator
Pressure stud
Luer Rotor Flexi shaft Seal
Motor
Drive shaft
CCW
CCW
CW
sealed ball bearing
Driver Board
M12 connector
Nordson Asymtek
Mini and micro dispensing solutions for fluids and pastes
page 6 off 20
ASYMTEK Dosing technology is based on the endless dosing progressing cavity pump. The
rotating element “Rotor” and the static counter part “Stator” form an optimal chamber
“Cavity”. Both rotor and stator touch eachother over the whole length to create a continuous
seal that prevents backflow even with higher back pressure. The movement of the rotating
rotor in the stator allows the fluid to be gently pushed to the next chamber without shearing
and squeezing the fluid. (picture 1).
Due to the fact that the cavity along the sealing line is always open, particles can be handled
without difficulties. ASYMTEK technology will pump and dose abrasive fluids but also more
viscous pastes whenever the chambers are correctly and completely filled.
ASYMTEK Rotors are manufactured to resist many chemical materials according CE
conformity. The high degree of smoothness of the rotor surface prevents fast wear and tear
and provides long life cycle time.
ASYMTEK Stators have been developed to offer less friction.
Driving the pump counter clockwise CCW conveys the fluid or paste from the suction side
towards the pressure side in picture 1 from left to right. To empty vessels or bottles, in
general the flow should go from right to left meaning clockwise CW. ASYMTEK pumps can
be used in continuous or indexed applications.
Picture 1
Picture1:
Shows the possibility to convey
particles and a gentle flow of the
material (yellow).
The dosing volume is
independent of the rotor(blue)
position since the cavities have a
defined volume.
Therefore, PCP technology is
optimal for dispensing.
Avoid dry running! Do not test with water!
Nordson Asymtek
Mini and micro dispensing solutions for fluids and pastes
page 7 off 20
3. Commissioning or starting up
3.1 General notice
Make sure you are aware of the safety instructions under 1.2 and your local
legislation
Make sure enough material is available
Make sure all connections are well tightened and sealed
Make sure all pump materials are compatible and resist the product
3.2 Trials
Testing with water can cause loud noises and destroy the stator. Reason for this effect is the
lack of lubrication by water. You may use Vaseline oil or glycol instead or insert an EPDM
based stator (if available). Fluor elastomers such as Viton®, Viton Extreme are to be
completely avoided with water. Alternatively you may test with the product used for the
application or also mesamol. Demineralised water is restricted for use at all times because it
may attack all pump materials. Please ask your distributor.
3.3 How to avoid dry running
Since the rotor made of metal is running in an elastomeric rubber stator, heat can be
produced when no material is being transported due to the lack of lubrication. There cannot
be any heat dissipation because the rubber stator is working like a shield. A continuous
friction builds up increasing heat that cannot be controlled therefore the stator material can
be destroyed rapidly relative to the pump speed. Possible solution: Start the pump slowly at
max. 10 rpm for max. 1 minute and/or pre-fill the pump.
3.4 Calibration (If available. Please see handbook electronics/controls)
Calibration is a process to enable the control box to understand about the volumetric filling
degree of the pumps cavities when it is being used for dosing or dispensing. Only by
performing this process you will reach the highest accuracy offered by ASYMTEK®.
The calibration can be performed many times. We suggest to recalibrate every time you
change the material or nozzle. Furthermore, recalibration may elongate the use of your
ASYMTEK Dosing pump after having used it for a longer period; the process will incorporate
possible low wear of the stator. You can easily calibrate by using a scale, start 1 round,
calculate the steps and divide taking into account the Specific Weight.
3.5 Position of the pump
Basically, all ASYMTEK pumps can be positioned in any direction. Nevertheless, please
consider the following:
Nordson Asymtek
Mini and micro dispensing solutions for fluids and pastes
page 8 off 20
3.5.1 Dosing and transferring: please do not succeed 6 bar pressure on the pump suction
side. Keep the pressure constant to avoid bad dosing results. In case needed, use a
pressure reduction valve. Avoid backpressure of >10 bar (145 psi) on the pressure side.
These are theoretical values made with water at 22°C (71.6 °F). Higher pressures can be
reached according the material viscosity and pump speed. Please adapt the nozzle and
needle in length and diameter to decrease backpressure. By using conically shaped needles,
the backpressure can be decreased so the suckback optimised.
Notice: We suggest using tapered needles whenever possible
3.5.2 Emptying: Stainless steel bodied pumps can be used up to 15 bar (217 psi). Plastic
versions should not be used above 7 bar (100 psi). In both cases, you will be able to reduce
the seal wear.
3.6 Commissioning
Open the leakage control which you can find opposite of the material entrance which
is sealed with an o-ring. Gently pre-fill the pump when possible, by using low pressure
steps. Give the product enough time to flow! As soon as material comes out of the
bore, you may close the leakage bore. See 4.1 under K
Start the pump with low speed (=filling program) until the material comes out thru the
nozzle without air bubbles. It is wise to put the needle after the bleeding process. You
may put the nozzle up to bleed the air.
Now start the calibration process if available. You will need at least a 3 digit scale.
After the calibration, you can set the dosing volume or speed and start the operation.
Notice: A restart after changing the software parameters could become possible.
3.7 Pump speed table
Following values are only an orientation support and not scientifically proved:
Produc
t
(cP
≈ mPa.s)
Speed
Suction pressure
Water like
fluids
Till
100%
ambient
Honey like pastes Max. 80% 1-3 bar (14.5 - 43.5 psi), Max. 3 bar (43.5 psi)
Oils
,
greases till
25.000 mPa.s
Max. 70%
2
-
3 bar
(
29
-
43.5 psi)
, Max. 4 bar
(
58
psi)
Oils
,
greases till
50.000 mPa.s
Max. 50%
3
-
4 bar
(
43.5
-
58
psi)
,
Max. 5 bar
(
72.5
psi)
Silicone und Epoxies not filled Max. 80% 3-4 bar (43.5 - 58 psi), Max. 6 bar (87 psi)
Silic
one und Epoxies
filled
Max. 60%
3
-
5 bar
(
43.5
-
72.5
psi)
, Max. 6 bar
(
87
psi)
UV-adhesives Max. 90% 1-2 bar (14.5 - 29 psi), Max. 3 bar (43.5 psi)
Pastes
till
50.000 mPa.s
Max. 50%
3
-
5 bar
(
43.5
-
72.5
psi)
, Max. 6 bar
(
87
psi)
Pastes over 50.000 mPa.s Max. 20% Max. 6 bar (87 psi)
Nordson Asymtek
Mini and micro dispensing solutions for fluids and pastes
page 9 off 20
In almost all applications, the material flowability is essential for a good dispensing result.
Make sure, that the pumps cavities are completely filled at max. dosing speed. The material
flowability is crucial for the pumps speed therefore do not just start the pump without thinking
about the rheology* of the product. The suction side pressure and pressure side back
pressure together with the dosing velocity are key for the long-life time of your ASYMTEK
pump.
* fluid science and flowability according molecular structure
4. Assembling and disassembling
your aCCura-Mix has been developed for dispensing. Each unit is tested in the factory. The
design is easy, and you do not need special tools. Hex keys M3, M2,5 and M2
Important notice: please note, that the rotor assembly is 1 piece and cannot be
disassembled.
4.1 Assembly (pictures may show similar items)
A
2 M
otor housing
1 Motor
4 x M3x8 DIN912
are needed for
assembly.
A
Nordson Asymtek
Mini and micro dispensing solutions for fluids and pastes
page 10 off 20
8 Seal A
3
drive shaft
4
ball bearing
5
safety ring
3 Rotor
assembly
:
3 Rotor
with flexi shaft
7
seal housing
2
Motor
housing
6
grub/set screw
B
C
Assembled in factory
Thru the whole of
the motor housing
(2) you can fit the
set screw (6)
B
8 Seal B
33
seal seat ring
Each aCCura
-
Mix pump has 2 seals
(8). In between, there is the seal seat
ring (33).
1. Position seal A
2. Put in seal seat ring
3. Position seal B
C
Use 2 x M3x10 DIN 912
screws t
o
connect the seal housing to the
pump housing (9).
NOTICE: some parts may be made of
POM. Do not use high torque!
D
Now assemble seal housing to the motor housing
7
seal housing
2
Motor
housing
9
P
ump housing
7
Seal housing
D
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