What property of the fluid being pumped is critical for selecting a diaphragm pump?

Viscosity is a critical property of the fluid when selecting a diaphragm pump because it directly affects the pump's ability to handle the fluid effectively. Diaphragm pumps operate by using a flexible diaphragm to create a vacuum that draws fluid in and then pushes it out. The viscosity of the fluid influences how easily it can be moved through the pump and the resistance it poses against flow.

High-viscosity fluids can cause more strain on the pump and may require a diaphragm pump with specific design features to manage the thicker fluid effectively. If the viscosity of the fluid is too high, it could lead to inadequate flow rates, increase wear and tear on the pump components, or even cause the pump to fail. Therefore, understanding the viscosity helps determine the correct diaphragm pump capacity, materials, and size to ensure efficient operation and longevity.

While the other properties like electrical conductivity, temperature, and pH level are important in other contexts, they do not have the same direct impact on the pump's performance as viscosity does.