Positive Displacement Pumps are Widely Used in Wastewater Applications

Positive Displacement Pumps
Positive Displacement Pumps


Positive Displacement Pumps add energy to the liquid they move by using a mechanical device to push it against a stationary or moving piston or plunger. It operates through a mating action between gears, lobes, and screw-type shafts. Depending on the application, these pumps can be either positive or negative displacement. They have many advantages, including being easy to maintain and allowing precise dosing. Lastly, they are a reliable choice for moving high-viscosity liquids.

One type of Positive Displacement Pumps is a single-screw pump with a rigid threaded rotor. These pumps are typically used in wastewater applications and are the most efficient for handling contaminated, viscous, and stringy liquids. Some of these pumps are also sanitary, with 3A-rated stainless steel construction to handle a wide range of food and drink products. They are often the most affordable type of positive displacement pump.

Flow rates vary widely from 0.38 to 15,000 gallons per minute. They can handle differential pressures up to 10 bars. They can handle thick or thin liquids. Positive Displacement Pumps Market are ideal for applications with high pressures and difficult-to-measure liquids. They also are the best choice for applications where accurate dosing is essential. They can operate at high temperatures and low pressures. In general, positive displacement have a large range of flow rates.

Another type of Positive Displacement Pumps is a gear pump. This pump has two gears that mesh. The driver gear connects to an electric motor through a shaft. The shaft rotates to drive the drive gear. The driver gear further rotates the driven gear, causing a vacuum on the suction side. A suction valve then pulls liquid into the pump. The liquid is then forced out through the outlet port.  A positive displacement moves a fixed volume of fluid from the inlet pressure section to the discharge zone. They are most commonly used in hydraulic systems. 

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