Reasons for Using Flat Tubings on UHPLC

[M_Farooq]

I am attaching a picture of a commercial UHPLC pump head. Does anyone know the reason for using such a design? It is intriguing.

Note the flat S shaped tubing going from mixer to the pump head.

Thanks.

[kubowicz.tomasz]

Hello

You have pump that can run up to 1200bar so a lot of heat is generated during solvent pumping.
This S-shape flat metal "thing" is heat exchanger.

Regards

Tomasz Kubowicz

[dblux_]

Hello

You have pump that can run up to 1200bar so a lot of heat is generated during solvent pumping.
This S-shape flat metal "thing" is heat exchanger.

Regards

Tomasz Kubowicz

Really ? That flat piece of tubing goes from proportioning valve to pump and it is not subjected to any heat resulting from solvent pumping.

[kubowicz.tomasz]

Hello

[/quote]
Really ? That flat piece of tubing goes from proportioning valve to pump and it is not subjected to any heat resulting from solvent pumping.[/quote]

Yes, you're right. Flat "tape" between MCGV and valve is Inlet Weaver.
I thought the question was about highlighted part of pump.

Regards

Tomasz Kubowicz

[Gerhard Kratz]

Maybe one of the engineers at Agilent in Waldbronn will find the time to answer your question.

[dblux_]

As Tomasz said it may function as dissipation of thermal effects accomanying mixing ACN with water - althou I always thought this effect is negligible.

[Peter Apps]

My guess is that it is a low volume mixing chamber, probably with some fancy internal architecture.

Peter

[kubowicz.tomasz]

Hello

It is low- pressure Inlet Weaver based on patented Agilent microfluidic technology ensures highest mixing performance and lowest mixing noise

Tom