Types Of Variable Volume Pump Fluidic Circuits

Integrating variable volume pumps, also known as precision dispense pumps, into fluidic systems requires careful consideration of valve configurations to ensure optimal performance. These positive displacement pumps offer dispense volumes ranging from 50 to 3000 µL and are crucial for various applications. Common setups involve 2-way solenoid valves, check valves, 3-way solenoid valves, or rotary valves. The choice of valves, particularly solenoid valves, demands attention to timing to avoid pressure spikes and maintain dispense accuracy.

This article delves into common pump configurations, including the use of two 2-way valves for fluid aspiration and dispensing, a single 3-way valve to simplify schematics and configurations for automatic pipetting. Additionally, it explores considerations for flush circuits, buffer supply with fixed dispense tips, and other strategies, providing valuable insights for optimizing variable volume pump applications.