AS MH2-D Series Скачать руководство пользователя страница 23

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AS Strömungstechnik GmbH

www.asstroemungstechnik.de

Version date: 09/2020

7 Troubleshooting

Error

Possible cause

Remedy

During operation, air bubbles
appear in the suction line above
the dispense head.

Lowermost o-ring on the dis-
pense head, which separates
the liquid channel from the vent
channel, is damaged.

Replace o-ring.

For chemicals with high vapor
pressure (e.g. NH4OH 28 %),
an increased pressure drop in
the suction line can lead to the
formation of gas bubbles or the
liquid column can break off.

Shorten the suction line,
Use of a dispense head
with manual shut-off
valve.

Container contracts during op-
eration and/or when the system
is stopped.

Vent channel of the dispense
head closed or not free.

Clean the dispense head,
e.g. in an ultrasonic clea-
ner

Ventilation of the container is
not sufficient to achieve com-
plete 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 Strömung-
stechnik

Thread on the dispense head
damaged.

Contact AS Strömungs-
technik technical custom-
er service, send in the
dispense head for repair,
see Section 9.3.

Operating medium escapes
from dispense head inlet (liquid
channel)

Contaminations/deposits in the
valve.

Clean/rinse the dispense
head.

Valve body or seal damaged.

Contact AS Strömungs-
technik technical custom-
er service, send in the
dispense head for repair,
see Section 9.3.

Troubleshooting

Содержание MH2-D Series

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

Страница 2: ...s Revision status A 09 2020 creation If you have questions about the products please contact AS Strömungstechnik GmbH manufacturer directly 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 Legal notice ...

Страница 3: ...s 10 4 Technical specifications 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...

Страница 4: ...tion 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 Please read the operating instructions carefully before using the products Please read the safety instructions Store the operating instructions in a safe and accessible place during the service life of ...

Страница 5: ...erating instructions are subject to copyright protection and other protective laws Duplication also in ex cerpts requires the prior written consent General information of AS Strömungstechnik GmbH if duplica tion 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 handl...

Страница 6: ... for use with pump systems For filling and recirculation applications refer to the operating instructions for fill 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 2 3 Responsibility of the user Operator means any nat...

Страница 7: ...use cleaned products The prod ucts described in these operating instructions have been cleaned in an ultrasonic bath at the factory Only use products for which the chem ical resistance of the components is guaranteed 3 Setup function In the M2 Series the following dispense heads are available Abbrevia tion Description MH2 D Dispense head with without check valve Standard electrically conductive MH...

Страница 8: ...ww asstroemungstechnik de Version date 09 2020 8 Nr 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 Setup function ...

Страница 9: ... check valve opens When 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 dis pense 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 additi...

Страница 10: ...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 accesso ries Setup function 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 24...

Страница 11: ... corresponding data sheet for the dispense head The dispense heads shown here are only exemplary representations Depending on the equipment 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 Technical specifications ...

Страница 12: ...d natural PE HD PVDF Conductive PP black PVDF black O ring variants Standard FPM FKM EPDM Connections Characteristic Value Connection vari ants 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 Technical specifications ...

Страница 13: ...er service of AS Strömungstechnik The chemical resistance of plastics and elastomers can deteriorate due to heat at temperatures higher than room tempera ture For dispense heads with built in sensors e g limit switch bubble sensor also ob serve the temperature specifications given in the sensor data sheet These may fur ther restrict the temperature ranges listed here Technical specifications 4 3 T...

Страница 14: ...ls and thus to leaks Dust deposits must be avoided in EX areas in par ticular 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 connect ed free of stress and load The connecting couplings must not be tightened too tight or too loose Both can lead to leaks Please use recomme...

Страница 15: ...no pressure range is available measurable 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 fi...

Страница 16: ...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 Assembly commissioning 4 Check the connecting couplings They must not be too tight or too loose Use the correct tightening torque that matches the screw connection P...

Страница 17: ... 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...

Страница 18: ... commissioning 5 3 Mounting the dispense head WARNING Hazard from chemicals Chemicals can cause irritation and chemical burns Observe the proper Standard Operat ing Procedures SOP when handling hazardous substances Observe the safety data sheets SDS of the chemicals used Wear the necessary personal pro tective equipment PPE suitable protective clothing protective gloves respirator and safety goggl...

Страница 19: ... Assembly commissioning 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 ven tilation holes in the dip tube You may hear a hissing sound In this case do not open the dip tube closure any fur ther but wait until no more hissing can be heard Check whether a bung wre...

Страница 20: ...ater mini mizes 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 Assembly commissioning 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 b...

Страница 21: ...embly commissioning 12 Check that the dispense head is completely and correctly mounted This means that the 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 NOTE If the head is not completely scr...

Страница 22: ...truc tions and regulations 3 Make sure that the dispense head is correctly mounted 4 Operation can be started Operation 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 mea surable visually check that the flow rate is constant and that the container does not inflate or collapse Check...

Страница 23: ...spense head closed or not free Clean the dispense head e g in an ultrasonic clea ner Ventilation of the container is not sufficient to achieve com plete 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 c...

Страница 24: ...e 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 Disassembly 8 Disassembly 8 1 Dismantling the dispense head WARNING Hazard from chemicals Chemicals can cause irritation and chemical burns Observe the proper Standard Operat ing Procedures SOP when handling hazardous substances ...

Страница 25: ...opening 10 Close the container by screwing on the dip tube closure 2 hand tight using the bung wrench 3 see Sec tion 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 Sec tion 4 3 T Typ W Typ S Typ V Typ Disassembly 12 Close the dip tube closure with the tamper proof cap and seal it with the red seal ...

Страница 26: ...y regularly may change due to expo sure to chemicals O ring on check valve Regularly check whether the check valve seals completely Dispense head Regularly check the con nections for proper screw connections 9 Maintenance disposal 9 1 Cleaning the dispense head After disassembly the liquid channel of the dispense head must be flushed with ultra pure water or a suitable flushing medium In the case ...

Страница 27: ...ell as the safety of logistic providers Maintenance disposal 9 4 Dispense head disposal WARNING Hazard from chemicals Chemicals can cause irritation and chemical burns Observe residual debris and degas sing of diffused chemicals Observe the safety data sheets SDS of the chemicals used 1 Disassemble the dispense head see Section 8 1 2 Clean the disassembled dispense head see Section 9 1 3 Dispose o...

Страница 28: ......

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