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Reasons for Using Flat Tubings on UHPLC
Posted: Wed Oct 22, 2014 5:11 am
by 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.
Re: Reasons for Using Flat Tubings on UHPLC
Posted: Wed Oct 22, 2014 6:00 am
by 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
Re: Reasons for Using Flat Tubings on UHPLC
Posted: Wed Oct 22, 2014 6:13 am
by 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.
Re: Reasons for Using Flat Tubings on UHPLC
Posted: Wed Oct 22, 2014 6:25 am
by 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
Re: Reasons for Using Flat Tubings on UHPLC
Posted: Wed Oct 22, 2014 6:26 am
by Gerhard Kratz
Maybe one of the engineers at Agilent in Waldbronn will find the time to answer your question.
Re: Reasons for Using Flat Tubings on UHPLC
Posted: Wed Oct 22, 2014 7:38 am
by 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.
Re: Reasons for Using Flat Tubings on UHPLC
Posted: Wed Oct 22, 2014 9:20 am
by Peter Apps
My guess is that it is a low volume mixing chamber, probably with some fancy internal architecture.
Peter
Re: Reasons for Using Flat Tubings on UHPLC
Posted: Wed Oct 22, 2014 10:02 am
by kubowicz.tomasz
Hello
It is low- pressure Inlet Weaver based on patented Agilent microfluidic technology ensures highest mixing performance and lowest mixing noise
Tom