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8 Disassembly

8.1 Dismantling 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, respirators and safety goggles / face shield).

1. Make sure that there is no negative pressure in the suction line.

Negative pressure in the suction line will cause air to flow in and chemical

residue to be blown out of the dispense head or the line to be filled with air.

2. Slowly unscrew the dispense head via the tightening nut.

If the container is under any pressure or vacuum when opened, it is drained

via the ventilation hole in the dip tube. You may hear a hissing sound. In

this case, do not continue unscrewing the dispense head, wait until no more

hissing can be heard and then finish unscrewing.

3. Pull the dispense head out of the dip tube until the dispense head is above the

dip tube opening.

4. Wait a few seconds so that condensate, for example, can still drip into the

container.

5.  Rinse and clean the dispense head with ultra pure water.
6.  Insert the dispense head, if present, into the docking station on the system side.
7.  Screw the dispense head in tight into the docking station.

Содержание QC M2 Series

Страница 1: ...Operating instructions Dispense heads of the series M2 Series English Translation ...

Страница 2: ...out 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 Ostfildern Germany info asstroemungstechnik de www asstroemungstechnik de All rights reserved Printed in Germany ...

Страница 3: ...ense 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 disposa...

Страница 4: ...ecial 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 ope...

Страница 5: ...ctions 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...

Страница 6: ... 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 Observ...

Страница 7: ... 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 ha...

Страница 8: ...ly 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 different No Object 1 Liquid line connection 2 Tightening nut 3 Check valve depending on model 4 Vent channel 5 Liquid channel 6 Retaining ring Code disk not displayed optional ...

Страница 9: ...en the pump is switched off the negative pressure in the suction line is reduced and the check valve closes To remove flammable or highly flammable 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 ...

Страница 10: ...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 ...

Страница 11: ...for the dispense head The dispense heads shown here are only exem plary representations Depending on the equip ment and configuration 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 ...

Страница 12: ... 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 ...

Страница 13: ...tomer 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 specifications given in the sensor data sheet These may further restrict the temperature ranges listed here 4 3 Torques for dip tube closu...

Страница 14: ... 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 specifications ...

Страница 15: ...able visually check that the flow rate is constant and that the container does not inflate or collapse CAUTION Danger due to leaks Exceeding the maximum flow rate can lead to leakage Take suitable protective measures against exceeding the maximum flow rate 5 Check test the chemical resistance of the dispense head for the chemical used On our website you will find a database with some data on chemi...

Страница 16: ...mature 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...

Страница 17: ...e 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...

Страница 18: ...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 fitted 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...

Страница 19: ...ection 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...

Страница 20: ...at 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 fo...

Страница 21: ...e dispense head must e g not be inserted at an angle Check whether further precautions must be taken to ensure this e g by using a dispense head with limit switch or by using a light barrier 13 Check again that the head is correctly inserted and tightened NOTICE If the head is not completely screwed on air is sucked in when the chemical is removed This will lead to the introduction of bubbles to t...

Страница 22: ... sure that the dispense head is correctly mounted 4 Operation can be started 6 2 Tests during operation Check the flow rate and regulate it so that no negative or excess pressure can develop in the container If no pressure range is available measurable visually check that the flow rate is constant and that the container does not inflate or collapse Check that minimal to no vibrations are transferr...

Страница 23: ...free Clean the dispense head e g in an ultrasonic cleaner Ventilation of the container is not sufficient to achieve complete pressure equalization Reduce the dispensing flow rate of the operating medium Dispense head can only be screwed into the dip tube at an angle or not completely Thread on dip tube damaged Contact chemical filler manufacturer supplier or technical customer service of AS Strömu...

Страница 24: ... blown out of the dispense head or the line to be filled with air 2 Slowly unscrew the dispense head via the tightening nut If the container is under any pressure or vacuum when opened it is drained via the ventilation hole in the dip tube You may hear a hissing sound In this case do not continue unscrewing the dispense head wait until no more hissing can be heard and then finish unscrewing 3 Pull...

Страница 25: ...opening 10 Close the container by screwing on the dip tube closure 2 hand tight using the bung wrench 3 see Section 3 1 11 Take a torque wrench 4 place it on the bung wrench 3 Tighten the dip tube closure 2 to the correct torque See the table with the torques in Section 4 3 12 Close the dip tube closure with the tamper proof cap and seal it with the red seal ...

Страница 26: ...tionality check O rings on the dispense head Regularly check for wear and tear and replace if necessary Electrical conductivity For CD version check conductivity regularly may change due to exposure to chemicals O ring on check valve Regularly check whether the check valve seals completely Dispense head Regularly check the connections for proper screw connections 9 3 Returning dispense heads 1 Dis...

Страница 27: ...ispense head see Section 8 1 2 Clean the disassembled dispense head see Section 9 1 3 Dispose of all parts in an environmentally correct manner Incorrect or negligent disposal can cause considerable environmental pollution Disposal must take place in accordance with the applicable national rules and regulations In case of doubt consult the manufacturer or obtain information on the environmentally ...

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