AS QC M2 Series User manual

Operating instructions
Dispense heads of the series
• M2-Series
English (Translation)

2
Legal notice
The operating instructions in German are the original operating instructions.
If you have questions about the products, please contact AS Strömungstechnik GmbH
(manufacturer) directly.
Revision status: 01/2022
Copyright, address of the manufacturer:
© Copyright by
AS Strömungstechnik GmbH
Elly-Beinhorn-Str. 7
73760 Ostldern
Germany
[e-mail]
www.asstroemungstechnik.de
All rights reserved.
Printed in Germany.

3
1 General information ....................................................................................................4
1.1 Introduction .........................................................................................................4
1.2 Conventions ........................................................................................................4
1.3 Symbols and labels.............................................................................................5
1.4 Copyright protection............................................................................................5
1.5 Guarantee and warranty .....................................................................................5
2 Safety ............................................................................................................................6
2.1 Intended use .......................................................................................................6
2.2 Improper use.......................................................................................................6
2.3 Responsibility of the user....................................................................................7
2.4 General safety instructions .................................................................................7
3 Setup / function ...........................................................................................................8
3.1 Auxiliary tools....................................................................................................10
4 Technical specications...........................................................................................11
4.1 Dispense head MH2-D.../MH2-D-...-C2............................................................11
4.2 Ambient / operating temperature ......................................................................13
4.3 Torques for dip tube closures............................................................................13
5 Assembly / commissioning......................................................................................14
5.1 Initial commissioning.........................................................................................14
5.2 Tests prior to assembly .....................................................................................16
5.3 Mounting the dispense head.............................................................................18
6 Operation....................................................................................................................22
6.1 Tests before each operation .............................................................................22
6.2 Tests during operation ......................................................................................22
7 Troubleshooting ........................................................................................................23
8 Disassembly...............................................................................................................24
8.1 Dismantling the dispense head.........................................................................24
9 Maintenance / disposal .............................................................................................26
9.1 Cleaning the dispense head .............................................................................26
9.2 Dispense head maintenance ............................................................................26
9.3 Returning dispense heads ................................................................................26
9.4 Dispense head disposal....................................................................................27
Contents

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1.1 Introduction
These operating instructions are only valid for the products mentioned in the title.
The gures shown are only exemplary illustrations. Depending on the equipment and
conguration, the actual appearance of the dispense head may vary.
These operating instructions convey important notes for the safe and e󰀩cient
handling of the products. They are part of the products. The prerequisite for safe
working with the products is the compliance with all specied safety instructions and
directives.
The operating instructions refer to standard versions. For special versions that are
not described in these operating instructions, the basic information in these operating
instructions applies in conjunction with additional special documentation.
The operating instructions are the basis for all training courses that take place with
the products.
NOTICE
• Read the operating instructions carefully before using the products to avoid
serious injury.
• Follow the safety instructions carefully to avoid serious injury.
• Store the operating instructions in a safe and accessible place during the
service life of the products.
• Pass the operating instructions to any subsequent owner or user of the
products.
1.2 Conventions
In order to be able to optimally work with the operating instructions, the following
clarications on typographical conventions must be observed.
List
• Texts displayed in this way are bullet points.
Handling instructions
1. Step 1 of the sequence of actions
2. Step 2 of the sequence of actions
3. Step 3 of the sequence of actions
The sequence of the work steps must be adhered to.
Tip
»Indicates general information and recommendations.
1 General information

5
1 General information
1.3 Symbols and labels
The following symbols are used in these operating instructions to depict hazards and
notes:
DANGER
Indicates a hazard which, if not
avoided, will result in death or
serious injury.
WARNING
Indicates a hazard which, if not
avoided, could result in death or serious
injury.
CAUTION
Indicates a hazard which, if not
avoided, could result in minor or
moderate injury.
NOTICE
Designates a situation that can result in
material damage.
1.4 Copyright protection
Despite all care taken, data and characteristics can change – even at short notice.
We therefore do not assume any liability or guarantee for the topicality, correctness
and completeness of the information.
Figures, graphics and texts as well as the design of these operating instructions
are subject to copyright protection and other protective laws. Duplication – also
in excerpts – requires the prior written consent of AS Strömungstechnik GmbH, if
duplication is not legally permitted.
1.5 Guarantee and warranty
AS Strömungstechnik GmbH assumes no liability for errors or damage that occurred
due to improper handling of the products.
Improper handling is in particular in the event of non-compliance with the operating
instructions, incorrect handling, negligence, unauthorized replacement of parts and
other interventions.
The customer is responsible for testing the chemical resistance of the dispense
heads and their service life.
Dispense heads and other products which have come into contact with media/
chemicals (except ultra pure water) cannot be taken back.
AS Strömungstechnik GmbH reserves the right to make design changes due to
further development of AS products.
Our customer service is always available even after the guarantee period has
expired.

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2 Safety
WARNING
Please observe the following notes to prevent malfunctioning, damage and
injuries.
2.1 Intended use
The M2-Series dispense heads are designed for the clean and safe dispensing/
withdrawal of neutral or inorganic liquid chemicals from transport containers which
do not adversely a󰀨ect the physical and chemical properties of the materials and
substances of which the dip tube used is composed.
NOTICE
The M2-Series conductive dispense heads are designed for the clean and safe
dispensing/withdrawal of neutral or organic liquid chemicals from transport
containers which do not adversely a󰀨ect the physical and chemical properties
of the materials and substances of which the dispense head used is composed.
They are electrostatically safe in the sense of the Cenelec Technical Report TR
50404: 2003 and therefore applicable in zones 1 and 2 for liquids of the entire
explosion group IIA.
Dispense heads may be used only in conjunction with AS dip tubes of the series
corresponding to the dispense head. Observe the operating instructions of the dip
tubes.
The dispense heads are designed for use with pump systems. For lling and
recirculation applications, refer to the operating instructions for ll heads of the
corresponding series.
2.2 Improper use
Any use other than the one described in the Section “intended use” is deemed to be
inappropriate use. The operator of the products shall be solely responsible for any
resulting damage.

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2 Safety
2.3 Responsibility of the user
Operator means any natural or legal person who operates or controls the device or
makes it accessible to third parties for use and who is responsible for the safety of
the user or third parties.
• In particular, observe the general safety and occupational safety regulations
of the BG Chemie in Germany or the responsible regional professional
association for chemistry and health (e.g. OSHA in the United States), the
applicable technical rules for hazardous substances, the Hazardous Substances
Ordinance, the CLP Ordinance, the company own standard operating
procedures (SOPs), as well as the regulations of the ATEX Directive, the
technical guidelines “Flammable liquids” and the explosion protection guidelines
of the BG Chemie in Germany or the responsible regional association / authority
for applications in hazardous areas.
• These operating instructions do not replace the company’s own standard
operating procedures (SOPs).
• Wear appropriate protective clothing when handling chemical substances.
• Do not use the dip tubes after the maximum period of use has expired, or else
serious injury may occur. The duration of use depends on the chemicals used.
• Before using the products, check the materials for their chemical resistance.
2.4 General safety instructions
• Always observe the safety data sheets (SDS) of the chemicals used.
• Only use cleaned products. The products described in these operating
instructions have been cleaned in an ultrasonic bath at the factory.
• Only use products for which the chemical resistance of the components is
guaranteed.

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3 Setup / function
In the M2-Series, the following dispense heads are available:
Abbr. Description
MH2-D... Dispense head with/without check valve,
• standard,
• electrically conductive.
MH2-D...-C2 Dispense head with/without check valve,
• standard,
• electrically conductive,
• special version for Clorious2.
Depending on the design, the dispense head may look slightly di󰀨erent.
No. Object
1Liquid line connection
2Tightening nut
3Check valve (depending on model)
4Vent channel
5Liquid channel
6Retaining ring
- Code disk
(not displayed/optional)

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3 Setup / function
The dispense head is generally equipped with:
• Liquid line connection to inlet of uid pump line connection,
• the tightening nut,
• standard connection to mating dip tube,
• the vent channel.
The check valve ensures that there is no ow back after transfer is complete and
there is no spill at disconnection. As soon as the pump is activated, the check valve
opens. When the pump is switched o󰀨, the negative pressure in the suction line is
reduced and the check valve closes.
To remove ammable or highly ammable chemicals from a container, there is an
electrically conductive version of the dispense head and the dip tube.
»The MOC of electrically conductive plastic dispense heads and dip tubes is
always black in color due to the carbon additive.
WARNING
Danger due to static charge.
Statically charged chemicals or dispense heads, dip tubes, etc. can cause sparks
to arc creating an ignition source.
• Ground the dip tube and dispense head properly.

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3 Setup / function
3.1 Auxiliary tools
The required auxiliary tools are listed below. For further details, please refer to the
corresponding data sheet and our website.
Docking station (for wall mounting)
Series Item no. Note
QC2/M2 RDC- 89740 incl. bottle
QC2/M2
conduc-
tive
RDC- 89740-CD without shelf
for accessories
Universal bung wrench
Series Item no.. Note
QC2/M2 RDH-79005 PVDF
QC2/M2
conduc-
tive
RDH-79003-CD electrically
conductive
Torque tool
The torque tool comes with torque wrench and attachment.
Series Item no.
QC2/M2 DH-Z-2-0001-02

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4 Technical specifications
4.1 Dispense head MH2-D.../MH2-D-...-C2
Characteristic Value Figure
Dimensions See the corresponding
data sheet for the
dispense head.
The dispense heads shown here are only exem-
plary representations. Depending on the equip-
ment and conguration, the actual dispense head
may vary in appearance.
Weight
Tightening
torque [Nm]
M2-Series: 2.6
Flow rates
[l/min]
M2-Series:
• max. 2 (with check
valve)
Period of use Depending on
chemical resistance
Standard: 2 years

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4 Technical specifications
Materials (Wetted components)
Characteristic Value
Housing variants Standard (natural): PE-HD, PVDF
Conductive: PP (black), PVDF (black)
O-ring variants Standard: FPM/FKM, EPDM
Connections
Characteristic Value
Connection variants
liquid
Flare: 1/4“
Hose Connector: 1/4“
G-thread: 5/8“
»Further information on the dispense heads can be found in the corresponding
data sheets. Possible other versions are available on request.

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4 Technical specifications
4.2 Ambient / operating temperature
Housing material Temperature
Environment Operation
PE-HD, PP 20-40 °C (68-104 °F) 20-40 °C (68-104 °F)
PVDF 20-60 °C (68-140 °F) 20-60 °C (68-140 °F)
For applications outside the listed temperature ranges, please contact the technical
customer service of AS Strömungstechnik.
The chemical resistance of plastics and elastomers can deteriorate due to heat at
temperatures higher than room temperature.
For dispense heads with built-in sensors (e.g. limit switch, bubble sensor), also
observe the temperature specications given in the sensor data sheet. These may
further restrict the temperature ranges listed here.
4.3 Torques for dip tube closures
QC2/M2
Closure type Torque
S -Ty p/ V-Typ
(3/4“ plug)
5-6 Nm
T-Typ/W-Typ
(M42 plug).
6-8 Nm

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5 Assembly / commissioning
In the containers onto which the dispense heads are mounted, there is already the
dip tube on which the dispense head is mounted. The dip tube is possibly key-coded
according to the liquid in the container and is tightly closed by means of the closure.
Depending on the closure, it can also be closed with a tamper-proof cap. For the
assembly described below, it is assumed that the closure is secured with a tamper-
proof cap.
5.1 Initial commissioning
1. Make sure that the entire system is in a clean environment.
NOTICE
Contamination and debris can restrict the functionality of the entire system
and lead to premature wear of o-rings and seals and thus to leaks. Dust
deposits must be avoided in EX areas in particular, as there is an increased
risk of ignition.
2. Connect the suction line to the liquid connection of the dispense head. The
following must be observed here:
• The suction line must be connected free of stress and load.
• The connecting couplings must not be tightened too tight or too loose. Both
can lead to leaks.
• Please use recommended torque specications of the respective
manufacturer when tightening nuts and screws.
• The screw connections must be secured against unwinding.
• When using are connections, see also AS are and assembly instructions.
• If the suction line is installed horizontally, it should be supported approx. 50
cm away from the dispense head.
• The vibrations of the uid pump must not be transmitted to the dispense
head via the suction line.
• The suction line should be as short as possible. This results in better suction
performance.

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5 Assembly / commissioning
3. Mount the dispense head on a container lled with ultra pure water. For
assembly, see the section “Mounting the dispense head”.
4. Perform a test run with ultra pure water and check the following points:
• Tightness of the connections and interfaces,
• Closing behavior of the valves; the valves (check valve, plug valve (turncock)
or ball valve) must seal completely,
• Ventilation of the container at maximum ow rate.
• If no pressure range is available/measurable, visually check that the ow
rate is constant and that the container does not inate or collapse.
CAUTION
Danger due to leaks!
Exceeding the maximum ow rate can lead to leakage.
• Take suitable protective measures against exceeding the maximum ow
rate.
5. Check/test the chemical resistance of the dispense head for the chemical used.
»On our website you will nd a database with some data on chemical
resistance, which can be used as a guide.
Link: https://asstroemungstechnik.de/de/chembank
6. Check whether the dispense head shows any damage such as cracks or
discoloring.
7. Use the rst liters of product as ushing chemistry to condition the dispense
head and connections.

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5 Assembly / commissioning
5.2 Tests prior to assembly
1. Use the label on the container to check whether the desired chemical is in the
container.
»In addition, an electronic chemical comparison should be carried out via
barcode or RFID.
2. Make sure that the container is placed in a dust-free environment.
NOTICE
Contamination and debris can limit the functionality of the dispense head and
lead to premature wear of seals and thus to leaks.
3. Carry out a visual inspection for the following points:
• Contamination and adhesion of chemical residues. The dispense head must
be clean.
• Make sure there is no damage such as cracks, etc.
4. Check the connecting couplings. They must not be too tight or too loose.
»Use the correct tightening torque that matches the screw connection.
Please use recommended torque specications of the respective
manufacturer when tightening nuts and screws.
»The screw connections must be secured against unwinding.
When using are connections, see also AS are and assembly instructions.

17
5 Assembly / commissioning
5. Check that the o-rings (1) and (2) are in place and undamaged (e.g. Cracks,
tears, and residue are signs of damage) and that the venting channel (3) is clear
of debris.
6. If a code disk is used check that the code disk (5) is on the dispense head and
that the coding matches that of the dip tube (6) and thus the chemical. This
means that only the correct three pins (7) must be missing and the code disk
must not be bent.
»Do not change any coding on the dip tube or the code disk if they do not
match. A list of the possible codings is available on request.
7. In the case of conductive dispense heads, check whether a conductive dip tube
is installed and whether it is grounded.
Follow the ATEX and OSHA instructions and regulations.
»For further information, please refer to the operating instructions of the dip tube.

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5.3 Mounting the dispense head
WARNING
Hazard from chemicals!
Chemicals can cause irritation and chemical burns.
• Observe the proper Standard Operating Procedures (SOP) when handling
hazardous substances.
• Observe the safety data sheets (SDS) of the chemicals used.
• Wear the necessary personal protective equipment (PPE) (suitable protective
clothing, protective gloves, respirator and safety goggles / face shield).
1. If a tamper-proof cap is tted to the dip tube closure of the container, remove the
blue seal on the original tamper-proof cap (1).
2. Open the tamper-proof cap and remove the red seal. Place both, if available, in
the docking station on the system side (see Section 3.1).
5 Assembly / commissioning

19
WARNING
Inhalation of chemical gases!
Inhalation of chemical gases is a health hazard.
• Open the container only while the chemical gas is being extracted.
• Please observe the applicable threshold limit values.
• Wear the necessary personal protective equipment (PPE) (suitable protective
clothing, protective gloves, respirator and safety goggles / face shield).
3. Slowly open the dip tube closure (2) with the bung wrench (3) in case the
contents are under pressure. (See Section 3.1)
»If the container is under pressure when opened, it is drained via the ventilation
holes in the dip tube. You may hear a hissing sound. In this case, do not open
the dip tube closure any further, but wait until no more hissing can be heard.
»Check whether a bung wrench with a special chamber for neutralization
granulate can be used so that the escaping gases can be additionally neutralized
when opening.
»If the chemical escapes when the container is opened, the container has been
overlled by the chemical ller. If this is the case, close the container again
immediately and contact the chemical ller / manufacturer / supplier.
5 Assembly / commissioning

20
4. Remove the dispense head, if present, from the system-side docking station.
5. Wet the o-ring (4) with ultra pure water.
»Wetting with ultra pure water minimizes sliding friction and protects the
o-ring from damage.
6. Make sure that electrically conductive dispense heads are properly grounded
with a ground wire and terminal.
7. Insert the dispense head into the dip tube.
8. If a code disk is used align the code disk using the red or green orientation pins
(5) and (6).
»The orientation pin of the dip tube and the code disk must be on top of each
other.
NOTICE
The code disk must not be bent or damaged. Never mount the code disk
using force.
5 Assembly / commissioning