[labnetwork] [EXTERNAL] Re: N2 consumption by SRDs

[April, Mark R.]

Hi All,
SITEK does offer a new controller called SLICK ONE, this does have a setting to shut off the N2 purge.  The new controllers are really nice also, they allow easy troubleshooting and programming.
Thanks

Mark R. April
Senior  Equipment Engineer
Microfabrication Laboratory
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555 Technology Square
Cambridge, MA  02139
mapril at draper.com<mailto:mapril at draper.com>
O # 617-258-1613 C # 617-455-1596
www.draper.com<http://www.draper.com/>



From: labnetwork <labnetwork-bounces at mtl.mit.edu> On Behalf Of Kyle Keenan
Sent: Wednesday, April 5, 2023 4:47 PM
To: Nathan Nelson - Fitzpatrick <nnelsonfitzpatrick at uwaterloo.ca>
Cc: labnetwork at mtl.mit.edu
Subject: [EXTERNAL] Re: [labnetwork] N2 consumption by SRDs

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Hi Nathan,

I'm surprised to hear that they have a constant N2 purge. This seems very odd to me. Stating the obvious, here, but can't Sitek reconfigure them? We've had (very old) Verteq Superclean SRD's and now RENA Compass SRD's, and neither type had a constant N2 purge.

Kyle

On Wed, Apr 5, 2023 at 4:15 PM Nathan Nelson - Fitzpatrick <nnelsonfitzpatrick at uwaterloo.ca<mailto:nnelsonfitzpatrick at uwaterloo.ca>> wrote:
Hi labnetwork,

My lab is going through a process of auditing our Nitrogen use, and an early target for saving on N2 are our spin rinse dryers.

We have four Sitek SRDs which are configured to continuously purge with N2 and to run occasionally (on a timer) to exercise the SRDs and run some DI water through them.  The constant N2 purge obviously consumes a ton of N2.

We’re considering either:


  *   Purchasing an (expensive) valve from Sitek that would cut off N2 flow when the SRD controllers are off.  We would then leave the SRD controllers off when they are not enabled by our lab users.
  *   Or we might consider setting up an interlock to drive a solenoid valve that would cut off N2 flow to the SRDs when they are not enabled in our lab management software.

I’m wondering what other interesting solutions people have fashioned to reduce N2 consumption by SRDs?

I’m also curious if there are any pitfalls we should look out for when pursuing something like this?

Many thanks in advance,
  -Nathan

--
Nathan Nelson-Fitzpatrick  PhD, PEng   (He/Him)
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Kyle Keenan

Senior Manager - Laboratory Operations
Quattrone Nanofabrication Facility
University of Pennsylvania
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