Our engineering platform
ValveDyn Pro
Compressor valve dynamic calculation — engineering-grade simulation and precision modeling behind every valve we recommend.
Free 30-day trial (single-stage analysis, no card required) — multi-stage projects, PDF export and the optimizer unlock with a license. macOS 14 (Sonoma) or later, Apple Silicon & Intel. The iPad version is in review on the App Store — details below.
What's inside the engine
Why our valve recommendations hold up
Most valve calculators give you a number. ValveDyn Pro tells you why — with transparent, defensible physics.
Dynamic ODE simulation
Full RK4 ODE solver on the valve plate — real lift, bounce count and impact velocity across the whole revolution, not a single-point flow check.
Four stability criteria
Costagliola hold-open, Frenkel flow-area sizing, Blevins flutter and 4-DOF resonance — cross-checked so a "healthy" score actually means something.
Wear & life prediction
Physics-based seat wear from Hertzian contact stress and Archard wear, calibrated against known reseat intervals.
Material selection engine
Feed it corrosive compounds, wet gas, liquids, solids and lubrication — it recommends ring, seat, spring and housing materials, and what it excluded and why.
Global optimizer
Sobol-sampled optimization of spring rate, lift and valve type across every stage of a multistage machine.
AI engineering assistant
Ask about your project in plain language — it answers from your actual computed results, not generic textbook advice.
One click to a client-ready PDF: parameters, per-stage performance, health scores and material recommendations — packaged automatically.
What you actually get
Real output, not marketing renders
Every screen below is the application running a five-stage CO₂ machine — the demo project that ships with it.
Coming to iPad
The same engine, on the plant floor
ValveDyn Pro for iPad is in review on the App Store — the same physics engine as the Mac app: valve dynamics, health score, optimizer, multi-stage machines and client-ready PDF reports.
Your projects, both ways
Open a .vdp project created on the Mac, work on it on the iPad and send it back. Same file, same results to the decimal.
Yearly subscription
Sold as a yearly subscription in the app, with the first month free for new subscribers. Customers who already hold a ValveDyn Pro licence key can enter it instead.
What is different
The AI engineering assistant and the 30-day trial stay on the Mac. The ODE solver, criteria, optimizer and gas properties are identical.
Requires iPadOS 26 or later. We will publish the App Store link as soon as Apple approves the app — write to us and we will tell you when it is live.
Try the engine yourself — free, right now
Upload a ValveDyn Pro project and get valve loss, capacity, bounce, health score and the lift curve in your browser — the same physics engine as the Mac app, results reproduced to the decimal. No install, no account.
From software to parts
Engineering that turns into the right hardware
ValveDyn Pro isn't a stand-alone tool for us — it's how we make sure the valve, ring, spring and material we supply actually suit your compressor and your service. The result is fewer failures, longer intervals and parts you can trust.
- Valve selection defended by simulation
- Materials matched to your real conditions
- Clear, documented engineering reports
Want a valve assessed?
Share your compressor and operating data and we'll run a ValveDyn Pro assessment as part of your enquiry.