Oil viscosity, hydraulic cylinders, power unit heat and cooler sizing, and hydropneumatic tanks.
Size a diaphragm pressure tank from pump flow, cut-in and cut-out pressures and the motor’s starts-per-hour limit, with recommended precharge.
Drawdown, precharge, starts/hCompute hydraulic and lubricating oil viscosity at any temperature with the ASTM D341 Walther equation and see the ideal range for gear, vane and piston pumps.
ISO VG, Walther, cold startCompute extend and retract force, speeds and stroke times of a hydraulic cylinder, the regenerative circuit gain, the pressure for a load and rod buckling.
Force, speed, bucklingEstimate the heat a hydraulic power unit generates, what the reservoir dissipates and the air-oil (P01) or water-oil cooler size, with the oil warm-up curve.
Heat load, P01, waterImportant notice: Indus Metrics tools produce estimates and pre-sizing results from the data you enter and from published engineering methods. They do not replace design, calculations or reports signed by a licensed professional engineer (PE), nor verification against the applicable codes, standards and regulations, such as OSHA rules and the ASME codes. Material and fuel properties vary: check manufacturer data or your own process analyses before deciding. By using this site you agree to the Terms of Use.
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