Difference 1 [Fluid transfer mechanism] :

Both KNOLL centrifugal pumps and positive displacement pumps transport water from the entry point to the exit point with a controlled degree of force and volume. However, the mechanisms they use are different. Positive displacement pumps draw fluid into the chamber, or expel the fluid, and then suction the fluid out of the chamber. Centrifugal or pneumatic pumps have a rotating impeller that draws fluid into the pump and forces it away from the exit point at a higher speed.

Difference two [Type of fluid delivery] :

Each type of pump is best suited for different types of fluids. Positive displacement pumps can handle high viscosity fluids, and their flow rate increases as the fluid thickens. On the other hand, centrifugal pumps cannot handle viscous fluids due to friction losses. In addition, positive displacement pumps can handle fluids that are shear sensitive - or that change when force, stress, or pressure is applied - while centrifugal pumps cannot; The impeller poses a risk to the fluid. Positive displacement pumps can also handle intermittent dry periods and can be started without the need for the liquid in the system to start. Liquid is required in the KNOLL centrifugal pump unit to activate the pressurization control.

Where KNOLL centrifugal pumps are used:

Centrifugal pumps are good at pumping thin liquids with low viscosity. These include water, dilute oils and fuels, and chemicals. They are the most commonly used pump class in high-volume applications that require high flow rates at low pressures. Some popular apps include:

• Municipal water supply and water supply systems

• Air conditioning and water circulators

• Irrigation

• Petrochemical and light fuel transfer stations

• Fire Protection

• Cooling tower

• Boiler feed

Using vortex impellers, centrifugal pumps can even handle some fluids with solids. However, they work best when pumping large, consistent amounts of water.

Positive displacement pump use place:

Positive displacement pumps, on the other hand, perform well in high-pressure and low-flow applications with viscous fluids. These pumps are suitable for the following applications:

• Municipal sewage system

• Oil processing center

• Manufacturing centers that produce or process thick pastes and other viscous materials

Complex facilities such as food processing plants and other manufacturing facilities benefit from the mixing of the two types of pumps. For example, a food processing operation will require a centrifugal pump to add water to a batch, but a positive displacement pump to control the movement of thicker compounds. Oil processing centers may require positive displacement pumps to process crude oil, while they can use centrifugal pumps to process thinner, lighter by-products.

The above content introduces the difference between KNOLL centrifugal pump and positive displacement pump, and where the two pumps are used respectively. In addition, Shenzhen Oudejie Technology specializes in selling new original German imported KNOLL centrifugal pumps, and promises to sell products are new original imported, while providing our customers with quotation, selection, product information and other services.