Hydraulic Circuit Simulator
Drag components onto the canvas, join the ports with wires, then press Run. Shift the valve, watch the cylinder move, and see pressure, flow, power and warnings update live. Start from an example if you like.
Circuit tools
Drag a port (circle) to another port to wire it · click a wire or component to select · R rotate · Del delete · open circles are unconnected ports.
Test traces (last 20 s)
Pressure (bar)
Cylinder position (mm)
Motor speed (rpm)
Checks & warnings
Model: lumped-parameter, incompressible-orifice flow with oil compressibility, spool dynamics, cylinder/motor inertia and friction. Hoses are treated as lossless. Results are indicative — not a substitute for component datasheets or a design review.
© 2026 HLA. The power unit builder and circuit simulator, including their calculations, are proprietary. Copying, scraping or reuse without written permission is not allowed.