Introduction
A rotary pump is a positive displacement pump that moves fluid by rotating one or more internal elements, such as gears, lobes, screws, or vanes. Unlike centrifugal pumps, rotary pumps deliver a steady, non-pulsating flow regardless of discharge pressure, making them ideal for high-viscosity fluids and applications requiring precise flow control. This article covers the working principle, key features, advantages, disadvantages, and applications of rotary pumps.

Introduction
The jet pump is a fluid-handling device that uses the Venturi effect to move fluids without any moving parts. Driven by a high-pressure working fluid, it creates a vacuum to draw in and transport another fluid. Its simple, reliable design makes it ideal for handling challenging fluids like slurries and corrosive chemicals, though it operates at lower efficiency than mechanical pumps. This article covers its working principle, key features, advantages, disadvantages, and applications.