Why Progressive Cavity Pumps Excel at Accurate Dispensing Applications

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Dispensing precision is critical for many industrial processes such as underfilling. Progressive cavity (PC) pumps are uniquely suited to meet tight tolerance requirements through their positive displacement technology.

Progressive Cavity Pump Design Enables Accuracy

PC pumps work by using a helical rotor that fits inside a double helix stator cavity. Rotation of the rotor progressively forms sealed cavities that transport fluid. This self-priming action ensures consistent, pulse-free flow even at low rates.

By controlling rotor RPM digitally, flow can be regulated extremely accurately. Integrated sensors provide real-time flow feedback to dispensing controllers. Together this enables dynamic compensation for any variances in fluid properties.

Table 1: Advantages of PC Pumps for Precision Dispensing

Advantage	Benefit
Positive displacement	Precise dose volume repeatability
Contain no valves	Eliminate valve inaccuracy/sticking
Self-priming design	Ensure consistent flow even at low rates
Compact size	Enable placement near point of use

Optimized for Underfilling Accuracy Needs

Unique PC pump designs have been developed specifically for electronic underfilling. Many use small 25-50mm rotors to dispense under 1mL accurately. Integrated filtration removes particulates to avoid defects.

Flow rates as low as 0.1mL/min can be achieved. Dynamic closed-loop control corrects for changes in viscosity as adhesives cure. Tight placement tolerances of ±0.005mL are routinely met with high-precision types.

Reliable Dispensing for Production Environments

PC pumps are also very robust - able to rapidly dispense all day in manufacturing settings. Self-cleaning cavities ensure consistent performance over 5000+ hours of runtime. Integrated seals prevent contamination of light-cure adhesives.

The positive displacement and pulsation-free flow of PC pumps make them uniquely suited for applications requiring highly accurate, precise dispensing. They provide a reliable solution for industrial processes with tight tolerance needs such as electronics underfilling.