Valve Flow Calculator (Metric Units) Air Pressure COPYRIGHT � 1997-2004 Pneumatics Online Pneumatics Online is THE Reference Source of the Pneumatics Industry… barBore SizemmRoom Temperature�cStroke LengthmmStroke TimesecondsNumber of CylindersPressure Dropbar VolumeCubic mmCv FactorInstantaneous FlowL/minTotal System FlowL/min