Turn PFDs into documentation in minutes
Upload a chemical Process Diagram. PFD Bench extracts equipment and tags, traces connections, and drafts a process description you can review, edit, and export.
Focus on process engineering.
Not on documentation.
Every PFD tells a story, but turning it into written specs usually means:
- cataloging equipment manually
- tracing inlets, outlets and flow paths one by one
- writing descriptions that match the drawing
- updating everything when the diagram changes
PFD Bench reads diagrams like an engineer.
It writes descriptions
you can use.
Upload
Standard DXF export from your CAD tool
Extract
Equipment, tags, and connections
Verify
Cross-check for consistency, with human review step
Generate
a process description you can edit and export
Why teams switch to PFD Bench
From hours to minutes
What took half a day becomes a quick review
Consistent and complete
Standardized output, fewer missed tags, fewer “did we include everything?” moments
Your data, your server
Dedicated deployment: on-premise or single-tenant VM + storage
I was shocked by the time I saved using PFD Bench!
Marlen Struve
Process Engineer
K-UTEC AG Salt Technologies, Germany
Savings calculator
See what PFD Bench could save you
Calculate your annual savings
See how much time and money PFD Bench can save your team per year.
Includes review and revision time.
Request a demo
to see it in action.
Common questions
Q: How accurate is the extraction?
Based on users’ experience, PFD Bench always identifies the correct equipment. It consistently achieves over 95% accuracy for the connections (how streams connect equipment to each other). The verification step lets you catch and correct any gaps before generating the process description.
Q: What file formats are supported?
DXF exports from standard CAD tools (AutoCAD, MicroStation, etc.). PDF support is on the roadmap.
Q: Can I edit the generated descriptions?
Yes. The output is fully editable before export.
Q: What about confidentiality?
Dedicated deployment is available. Your diagrams stay on your infrastructure – no shared servers. The only data leaving your environment are the API calls to state-of-the-art LLMs. Using local LLMs for maximum privacy is on the roadmap.
Q: Can’t I do this with ChatGPT?
For simple PFDs, general-purpose AI can produce a rough draft. But in real projects, diagrams get complex: dozens of equipment items, recycling loops, multiple feed and product streams. That’s where accuracy drops fast.
PFD Bench was built specifically for this. It parses the diagram
structure (not just the image), cross-checks connections, and
consistently delivers 95%+ accuracy, even on complex PFDs. In fact,
PFD Bench started exactly because ChatGPT wasn’t good enough.
Q: How much does it cost?
We offer evaluation access so you can test with your own PFDs. Contact us for a live demo and dedicated instance pricing.
PFD Bench’s story
It started in December 2024, when an engineer from our partner K-UTEC asked if we had a good prompt for turning a process diagram into a description…. (read more)
We tried it over a Saturday morning with the first vision-capable AI models, and for a very simple PFD, it worked.
Then reality hit. On real-world PFDs (complex, dense, with dozens of equipment items) the errors were too many. It wasted time rather than saving it.
So in mid-2025 we started building PFD Bench: a dedicated tool that parses diagram structure, cross-checks connections, and uses carefully engineered prompts to deliver reliable results. Getting from “curious demo” to 95%+ accuracy on complex diagrams took more work than we expected. But every engineering team we talked to had the same bottleneck.
So we turned it into a product.
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