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Try the ValveDyn Pro engine, right now

⚠ Beta — freshly launched, rough edges possible. Spot something wrong? tell us.

Enter one compressor stage and see valve loss, capacity, bounce, health score and the lift curve — the same physics engine behind the ValveDyn Pro Mac app, running in your browser. This preview uses a smaller field set, so treat the numbers as indicative. For real project work — multi-stage chaining, the optimizer, material selection, and the full report — get the Mac app.

Stage input

Fields left blank use the engine's own defaults, exactly like an untouched field in the Mac app.

Cylinder

Bore (mm) *

Stroke (mm) *

Speed (rpm) *

Conditions (absolute pressure)

Suction (bar a) *

Discharge (bar a) *

Suction temp (°C) *

Valve

Type *

Lift (mm) *

Spring rate (N/mm) *

Valve OD (mm)

Suction valves/end

Discharge valves/end

Gas

Preset

Advanced — ring / seat dynamics (optional, improves accuracy)

Cylinders

HE clearance (%)

CE clearance (%)

HE rod (mm)

CE rod (mm)

Wall temp (°C)

Discharge lift (mm)

Spring preload (N)

Discharge valve OD (mm)

Rings

Ring mass (kg)

Ring material

Ring thickness (mm)

Ring wall thickness (mm)

EOS model

Seat channel width (mm)

Seat inner diameter (mm)

Damping ratio

Restitution coeff.

Fill in the stage on the left and press Run analysis.
Results, health score and the lift curve will appear here.

Try the ValveDyn Pro engine, right now

Stage input

Results

This is one stage. Real projects have five.

API endpoint