How is the pumping action in positive displacement pumps accomplished?

Positive Displacement Pumps

What is a Positive Displacement Pump? | Types of Positive Displacement Pump

Centrifugal Pumps vs. Positive Displacement Plunger Pumps

Core Engineering on Instagram: "When the pressure rises, why do we ditch the Centrifugal and go for Positive Displacement? ⚙️ In the world of fluid dynamics, Positive Displacement (PD) pumps are the undisputed heavy lifters when system resistance gets high. But why is that? It comes down to the fundamental difference in how they move energy. Unlike centrifugal pumps, which rely on rotational velocity (kinetic energy) to create pressure, PD pumps simply trap and force. They capture a fixed volume