Which type of pump is specifically noted for use with flowable, EC, or soluble powder formulations?

The correct answer is a roller pump, which is specifically designed for handling flowable, emulsifiable concentrate (EC), or soluble powder formulations. Roller pumps work by using rotating rollers to compress a flexible tube, creating a suction that draws the liquid into the pump and then forces it out. This type of pump is particularly effective for transferring products that are viscous or contain solid particles because it can handle the shear stress associated with these formulations without causing damage or creating foaming.

Roller pumps are also advantageous because they can maintain a consistent flow rate and are not susceptible to damage from suspended solids, which makes them ideal for agricultural applications where such formulations are common. Their construction allows them to reliably handle various chemical mixtures without risk of contamination or degradation.

In contrast, diaphragm pumps may not handle thicker or highly viscous formulations as well, while piston pumps are typically used for high-pressure applications and may struggle with the particulate matter found in some formulations. Centrifugal pumps work best with low-viscosity fluids; they rely on high-speed rotation to create flow, which can lead to issues if the extracted material has solids or is prone to foaming. Thus, roller pumps are the most appropriate option for the described uses.