turboXSolver — pump engineering, solved interactively.

Interactive calculators, simulators and a bilingual knowledge base for centrifugal pumps, systems and turbomachinery. Drag the curves, move the sliders, get engineering-grade answers with pass/fail criteria.

Calculators

System Curve × Pump Curve

Drag the curves, find the operating point, slide speed for affinity-law movement and VFD vs throttling savings.

NPSH Available Calculator

Step-by-step NPSHa with vapor pressure from water tables and a margin-ratio traffic light against NPSHr.

Affinity Laws & VFD Savings

Speed and impeller-trim scaling with live curves; annual energy and cost savings of VFD vs throttling.

Specific Speed & Impeller Type

Ns / nq / Ωs converter with the impeller-shape selection chart and Nss traffic light.

Suction Specific Speed & NPSH Life

Nss traffic light, the NPSH₄₀₀₀₀hrs estimation chain and cavitation-life screening for high-energy pumps.

Water Hammer Calculator

Wave speed, Joukowsky surge, valve-closure classification and column-separation alarms with a live waveform.

Pump Sizing — TDH & Motor Wizard

Stepped total-dynamic-head builder (lift + pressure + friction), BHP and motor selection with service-factor traffic light.

Pipe Friction Loss

Darcy–Weisbach all regimes with Colebrook solver, fitting ζ library and Hazen–Williams mode.

Pump Troubleshooting Wizard

Pick symptoms, get ranked causes from the 25×85 fault matrix — plus a vibration frequency analyzer.

Unit Converter

16 categories, 200+ engineering coefficients: flow, head, power, viscosity, torque and more.

Slurry Critical Velocity

Vsm dual-limit model, V50 by d50, concentration conversions and slurry service-class screening.

Intake Design Calculator

Bell-mouth sizing to ANSI/HI 9.8, Hecker submergence check and a full vortex-criteria compliance list.

Mechanical Seal Calculator

Five-step seal chain (balance → PV → power → ΔT), leakage limits and an API 682 flush-plan advisor.

Reciprocating Pump Pulsation

Pick cylinders, action and L/R — watch the instantaneous flow curve and pulsation verdict update live.

Pump Noise Calculator

Full chain: BHP → dBA → octave bands → distance → multi-source synthesis, with OSHA dose verdicts.

Jet Pump Calculator

Area ratio, entrainment ratio and the N-shape characteristic curve — with cavitation CR screening.

Turbine Specific Speed

Hydraulic turbine Ns selection bands (Pelton / Francis / Kaplan), synchronous speed ladder and rotor profiles.

Polytropic Efficiency

Centrifugal compressor polytropic vs isentropic efficiency by the temperature method (PTC 10 conventions).

Minimum Flow / MCSF

Thermal-rise and Heald–Palgrave dual methods with bypass scheme guidance — protect the pump from dry-run damage.

Cavitation Simulator

Slide NPSHa down and watch the suction-pressure valley cross vapor pressure — bubbles, erosion activity and head collapse in real time.

Pump Curve by Specific Speed

Slide the specific speed and watch the normalized H/P/η curve family morph — from unstable rising to steep stable shapes.

Moody Diagram Interactive

The friction-factor chart as a live tool: Re, relative roughness and regime verdicts from the Colebrook equation.

PAT Four-Quadrant Simulator

Pumped-storage four-quadrant operation with the Bad Creek runaway trajectory replay and runaway-speed verdicts.

Curve × Flow-Regime Simulator

Slide from shutoff to runout and watch the impeller flow pattern morph — recirculation vortex, best-flow and jet-wake.

Fan Static Pressure Calculator

Step-by-step FTP/FSP build-up along duct sections with a live pressure profile and ductulator quick tables.

Moody Diagram Interactive

The friction-factor chart as a live tool: Re, relative roughness and regime verdicts from the Colebrook equation.

Parallel Pumping Simulator

Combine two pumps and watch the combined curve, duty point and the hunting instability alarm in real time.

Column Separation Simulator

Power failure transient: watch the water column separate, the cavity grow and the slam arrive — with the −10.3 m red line.

Knowledge Base

Short, formula-first lessons — every claim comes with its equation. Click a tag above to jump in.

Why turboXSolver is different

Real theory, shown — every tool displays its governing equations with symbol definitions and valid ranges, distilled from Karassik Pump Handbook and Sulzer Centrifugal Pump Handbook.
Interactive canvases — drag pump curves and system curves, slide speed and watch the operating point move in real time.
Engineering verdicts, not just numbers — traffic-light criteria (NPSH margin, suction specific speed, operating window) built in.
US & SI units, English & 中文 — one click switches everything.