A Positive Displacement Pump, unlike a Centrifugal or Roto-dynamic Pump, will produce the same flow at a given speed (RPM) no matter the discharge pressure. A Positive Displacement Pumps is a " constant flow machine "

A positive displacement pump, also known as a volumetric pump, moves fluid by trapping a fixed amount of it and displacing it into the pump's discharge pipe. Unlike centrifugal pumps, which rely on impellers to generate flow, PD pumps use mechanical means to move the fluid.

What Is a Positive Displacement Pump? A positive displacement (PD) pump moves a fluid by repeatedly enclosing a fixed volume and moving it mechanically through the system. The pumping action is cyclic and can be driven by pistons, screws, gears, rollers, diaphragms, or vanes.

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Furon PDP pumps are designed for long life and are maintenance-free, maximizing the end user's up-time. Our patented PTFE rolling diaphragm technology coupled with precision stepper motor control enables precise dispensing of aggressive or ultra-pure media, eliminating the requirement for expensive flow controllers.

PD (positive displacement) pumps have a fixed displacement volume and their flow rates are directly proportional to their speed. They generally need more safeguards than a centrifugal pump, such as relief valves to prevent over-pressurization. They also typically have more wear parts than a centrifugal pump, and require more frequent maintenance.

How do you know which positive displacement pump is the right fit for your needs? Our expert engineers have shared some insights on what to look for below. The following is a high-level comparison designed to give you a closer look at the differences between lobe pumps, circumferential piston pumps and twin-screw pumps.

2023年12月9日 · Positive displacement pumps operate on the principle of displacing a fixed volume of fluid with each cycle of operation, ensuring a consistent and predictable...

What is a positive displacement pump? A positive displacement (PD) pump moves a fluid by repeatedly enclosing a fixed volume and moving it mechanically through the system. The pumping action is cyclic and can be driven by pistons, screws, gears, rollers, diaphragms or vanes. How does a positive displacement pump work?

A Positive Displacement pump (PD pump) is a mechanical device which displaces a known quantity of liquid for every revolution or cycle that the pump completes. The flow rate through a positive displacement pump is directly proportional to …