Mechanical Volumetric Dosing Calibration for Textile Pad Dyeing Systems
Mechanical volumetric dosing calibration requires gravimetric cross-verification and pressure-balanced manifolds to prevent shade tailing in pad dyeing.
Pump Slip Factor
Volumetric Loss
Fluid leakage calculation used to account for the internal backflow within a pump during operation. The pump slip factor is a ratio that compares the actual volume of liquid delivered to the theoretical volume of the pumping chamber. The value is measured against a calibration standard and is influenced by the discharge pressure and the age of the equipment.
Viscosity Influence
Internal clearances between the moving parts allow a portion of the fluid to escape back toward the inlet. If the pump slip factor is high, the system will deliver less dye or chemical than the electronic controller indicates.
Operational Speed
High viscosity liquids tend to resist leaking through narrow gaps, which results in a more efficient pumping action. When working with a low viscosity fluid, the pump slip factor becomes more significant and requires more frequent adjustment of the motor speed.
System Pressure
Higher pressures at the discharge port force more liquid through the internal seals. Continuous monitoring of the flow rate allows the mill to calculate the pump slip factor in real time and apply a correction to the dosing program. Maintaining a low error rate is necessary for achieving a consistent shade in the dyeing process.
The calculation is a fundamental part of the maintenance strategy for any industrial chemical delivery system.