Which type of pump is typically not recommended for use with water-based solutions?

Gear pumps are not recommended for use with water-based solutions due to their design and the potential for issues with compatibility. Gear pumps work by using interlocking gears to move fluids, which can create high shear forces. This can lead to the breakdown of certain water-based solutions, especially those containing additives or suspended solids. Additionally, gear pumps can be more prone to corrosion and wear when handling water-based solutions, particularly if there are contaminants or aggressive chemistries involved.

In contrast, diaphragm pumps, roller pumps, and centrifugal pumps have designs that are generally more compatible with water-based solutions. Diaphragm pumps are great for preventing contamination as they separate the pumping mechanism from the fluid. Roller pumps are designed to handle various viscosities and can move water-based solutions effectively. Centrifugal pumps can efficiently handle fluid movement, making them a common choice for various applications involving water.