Which type of pump utilizes a flexible diaphragm instead of a piston?

The diaphragm pump is designed to use a flexible diaphragm to move fluids, which differentiates it from other types of pumps that rely on more rigid components. This pumping mechanism works by creating a change in volume within a chamber; as the diaphragm moves, it expands the chamber to draw in fluid and then compresses to push the fluid out.

This design allows diaphragm pumps to handle a range of liquid types, including corrosive or viscous materials, without the risk of leakage that can occur with piston pumps. The diaphragm’s ability to flex and create a seal plays a crucial role in maintaining pressure and minimizing the chance of contamination, which is especially important in applications involving sensitive or hazardous substances.

In contrast, other pump types like piston pumps use a rigid piston that moves back and forth, and gear pumps utilize interlocking gears to transfer liquid, neither of which incorporates a diaphragm in their operation.