REFLUX
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Reflux for Aspen Plus

Your Aspen Plus, with an engineer that never sleeps

Open a flowsheet, ask what is wrong, get it fixed and re-run with every number read back from Aspen.

Reflux on the left, Aspen Plus on the right: a two-stage condensate stabiliser built and run from one sentence. Unedited except for the waiting. You need Windows and your own Aspen Plus V14 licence.

How it works

  1. Enter your email. Free: a sign-in link arrives with the download. Paid plans: pay first, then the same page.
  2. Install Reflux. It opens your browser with a short code; approve it and Reflux is connected. Nothing to copy.
  3. Reflux opens beside Aspen. Point it at a flowsheet file or describe what to build.

Reflux is independent software that drives Aspen Plus through its published automation interface. Aspen Plus is a product of Aspen Technology, Inc.; Reflux is not affiliated with or endorsed by AspenTech.

Get access

No card to try it. Paid plans go through Stripe in US dollars.
  • Works on existing flowsheets and builds new ones from scratch (Aspen Plus V14, Windows).
  • Repairs are saved as a new file next to yours. Your original is never overwritten.
  • No card to start. Cancel any time; a plan you paid for runs to the end of its period.

Aspen Plus has no Mac or Linux build, so Reflux runs where Aspen runs. If you reach Aspen through a Windows VM or a remote Windows desktop, install Reflux on that same machine.

Free to start is a trial with a limit on it, not a free product. When it runs out the app shows you the plans and you pick one, or you stop. You need Windows 10 or 11 and Aspen Plus V14 installed and licensed (your university's academic licence is fine). See the plans.