In a chemical feed system, which pump type is most appropriate?

• A. End suction centrifugal
• B. Split case
• C. Rotary
• D. Peristaltic

Answer: (D)

Accurate dosing of chemicals requires a pump that delivers a known volume with minimal risk of contamination or chemical attack on the pump itself. A peristaltic pump does this by using a flexible tubing that is squeezed by rollers to move the liquid; the fluid never contacts the pump’s moving parts, only the tubing, so you can choose chemical-resistant tubing and replace it easily. This design provides positive displacement, giving precise, repeatable flow that is easy to adjust by changing tubing or the drive speed, and it handles a range of viscosities and even shear-sensitive fluids without introducing contamination from seals or impellers. Other pump types rely on seals, impellers, or gear mechanisms and are less suited to metering and to handling aggressive chemicals with easy maintenance, making them less ideal for chemical feed dosing.