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Liquid handling with the solenoid valve module

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					                                                                                        No. 296e


Application Bulletin
Of interest   General analytical chemistry, solenoid, valve, module, block                 P1
to:




    Liquid handling with the solenoid valve module

Summary
                       The solenoid valve module (3/2 valve) can be used for many different tasks. Mainly
                       it is used to switch between different flow directions. For example the distribution
                       of only one reagent to two different titration cells. It can be used as well as a kind
                       of unidirectional restrictor valve. If needed it is opened and liquid can flow through.
                       If closed the back-flow is interrupted and a proper separation is achieved.
                       The solenoid valve module is an optional part for ProcessLab. The whole module
                       block has sufficient space for four valves. The valve module comes with already one
                       preinstalled. If needed additional valves can be added.




Key facts/features

                       •     Max. 4 valves per module block, 1 valve already included
                       •     Fully integrated as valve in tiamo for ProcessLab
                       •     To control a valve one digital output is needed (a terminal provides 4 digital
                             outputs)


Part numbers/ordering

                       •     6.7206.210; ProcessLab solenoid valve module incl. 1 valve
                       •     6.7206.220; Solenoid valve PEEK/FFKM
                       •     6.7202.200; ProcessLab Digital output 4 DO 24V DC
                       •     6.1808.090; M8/M6 adaptor (included, only spare part)
                                     Application Bulletin                                         No. 296e
Liquid handling with the solenoid valve module                                                        Page 2




Technical data/maintenance (the valve itself)

               •   Made of PEEK/FFKM, resistant against most common chemicals
               •   Not resistant again halogenated hydrocarbons, HF, > 30% H2SO4
                   and > 40% HNO3
               •   Pressure range 0 – 2 bar, only used for liquid handling within ProcessLab
               •   Voltage/Power comsumption 24 VDC/5W (from ProcessLab I/O controller)
               •   Hermetically tight, no contact of media and electromechanical part
               •   Direct acting
               •   Temperature range from 0-70 °C
               •   Maintenance and disassembling only by qualified personnel


Applications
               There are several ways to use a valve, the common ones are explained below.


               •   Sample or reagent distribution (1 input/2 outputs OR 2 inputs and 1 output)
               1 Input/2 outputs
                                                    NO                 NO
                                                                                          Key

                                                                                          NO
                                                                                          Normally opened

                                                    NC                 NC                 NC
                                                                                          Normally closed
                                         Switched OFF              Switched ON
               2 Inputs/1 output
                                                    NO                 NO




                                                    NC                 NC


                                         Switched OFF          Switched ON



               •   Sampling with overflow pipette, 2 valves needed
                                                 Overflow-Pipette
                                                                                          Functions

                                                                                          Filling/overflow
                                                                                          Valve 1 ON
                                         Valve 1                     Valve 2              Valve 2 OFF
                                            NO                         NO
                                                                                          Release sample
                                           in/out                     in/out              Valve 1 OFF
                            Sample                                                        Valve 2 ON

                                                                                 Vessel
                                            NC                         NC
                                                         T-Piece
                                    Application Bulletin                                             No. 296e
Liquid handling with the solenoid valve module                                                           Page 3


               •   Splitting or combining a liquid stream
                                    Connection 3                         Connection 1        Functions

                                                                                             Connection 1
                                             NO       NO        NO
                                                                                             All valves OFF

                                                                                             Connection 2
                                                                                             Valve 3 ON

                                                                                             Connection 3
                                             NC       NC        NC
                                           Valve 1   Valve 2   Valve 3
                                                                                             Valve 1 ON

                                                                                             Connection 4
                                      Connection 4                       Connection 2        Valve 1 ON
                                                                                             Valve 2 ON




               •   Use like a unidirectional restrictor valve by simply switching it
                   permanently ON or OFF


                      NO                                                    NO
                                Connection 1                                          Connection 1

                           in                                                    in


                                Connection 2                                          Connection 2
                      NC                                                    NC

               Switched OFF – connection 2 closed                Switched ON – connection 2 opened


Detailed views




               The solenoid valve module




               The solenoid valve
                                    Application Bulletin                                  No. 296e
Liquid handling with the solenoid valve module                                              Page 4




Integration in tiamo
               A solenoid valve will appear as a valve in tiamo. Switched off means the first and
               second connectors are opened. When switched on the second and third one are
               opened.
               One valve needs one digital output, a completed module needs a whole digital out-
               put terminal.




               Fully equipped solenoid valve module as it appears in tiamo


Restrictions

               •   Do not use this valve for liquids which contain solid particles or materials to
                   avoid crystallization in the valve.
               •   Not dedicated for highly viscous fluids

				
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Description: No. 296e Application Bulletin