ink pumping problem

[sriraghavan]

we are facing ink pumping problem because viscacity do any one of have any tips to over this presently we are having huge stock of inks. while pumping very thin film ink coming to the printing units takes long time to fill the ink ducts.we are using coldset ink

 

[Deleted member 16349]

we are facing ink pumping problem because viscacity do any one of have any tips to over this presently we are having huge stock of inks. while pumping very thin film ink coming to the printing units takes long time to fill the ink ducts.we are using coldset ink

Viscosity will decrease if you increase the ink temperature. The question is by how much. Maybe not enough to help you out.

Maybe look for ways to heat up the ink. Maybe at the tank or drum. Maybe with tracer lines on the supply pipes to warm the pipes.

Also insulating the pipes would be good too over the tracing lines.

Another idea is to have more ink flow. Viscosity drops a lot when ink is agitated. Much more than if it is heated, IMO. If the ink can be agitated before it goes into the pump, that might help.

Often when trying to pump high viscosity fluids, the output of the pump is not such a problem but the intake to the pump can be. What happens is that the suction pressure drops so much, that the ink will cavitate and this prevents any ink getting into the pump. No ink into the pump means no ink out of the pump. This applies to centrifugal pumps or constant displacement pumps.

Hope this helps.

 

[Alois Senefelder]

Ink Pumping


Hello,


We need a more precise description of the problem !

Questions:

1) Are you using a commercial installed Ink Pumping System ?

2) Are ALL ink pumps (CMYK) affected?

3) Is the Ink supplied in 1000Kg Silos ?

4) Are the Silos fitted with Temperature Controlled Heat Jackets ?

5) Open a by-pass valve on all ink lines and time how long it takes to fill a 5ltr container.

6) and WHY could it not be a simple Ink Pump Malfunction or poor air pressure supply ?


Regards, Alois

 

[sriraghavan]

we re not using commercial installed ink pumping system we are facing this problem in all ink pumps{CMYK} the ink is pumped directly to the printing unit ink ducts from a 200kg barrels here we are facing pumping problem very thin film of ink comes to the ink ducts we have opened the by-pass valve to its full opening and no Temperature controlled Heat jacket is fitted with.I assume it can not be simple ink pump malfunction if it so it can be in one or two ink pumps{motors]but not all in ink pumps.Please enlighten me.

 

[Alois Senefelder]

Hello sriraghaven,


Have you change your Ink Supplier, if so were they aware that you are using a Ink Pumping System ???

Regards, Alois

 

[sriraghavan]

fail to understand any how my sincere thanks to you

 

[Alois Senefelder]

Hello sriraghaven,


A lower Viscosity Ink is needed for Ink Pumping.


See - PDFs Power Ram Pumps


Regards, Alois View attachment Power Ram Ink Pump # 1019.pdf View attachment Power Ram Ink Pump # 1019.pdf