Water pumps and pumping systems are a necessity for many construction projects. The ground often needs to be dewatered and dig sites can easily accumulate water due to rain and other water sources. Good pumps are necessary to maintain the integrity of the project and ensure all your workers can continue to build safely.
When installing pumps for a construction project, the two types most commonly used are either centrifugal pumps and positive displacement pumps. Each has its advantages or disadvantages, based on the situation. Let’s quickly look at the differences.
Centrifugal vs Positive Displacement Pumps for Construction Work
I. Centrifugal Pumps
Centrifugal pumps rely on a rotating impeller to power the pumping action, as well as pressurizing the discharge flow. They come in both standard and submersible models, depending on the situation and the amount of water being moved.
Centrifugal pumps are capable of handling virtually any liquid, even very thin liquids or materials with low viscosity. They also offer high flow rates and are typically best when a large body of water simply needs to be removed as quickly as possible.
The drawbacks of centrifugal pumps largely boil down to maintenance issues. These pumps must be primed with some of the liquid being pumped, and typically also require liquid circulation within the pump to provide cooling. Also, the positive suction head must be carefully chosen to match the pump and the liquid. If the suction is too low, air bubbles – cavitation – can enter the system, causing vibrations or even shockwaves that will disrupt flow.
II. Positive Displacement Pumps
Positive displacement pumps rely on a bellows-style system, using a flexible diaphragm to induce fluid motion. These are typically best at moving high-viscosity liquids, or fluids that may contain solids that could foul a centrifugal pump. These pumps are extremely energy-efficient, and there’s no concern of air entering the system.
However, the main drawback is that they tend to operate at low speeds, which makes them slower to function than centrifugal pumps in many situations. If operated at speeds that are too high, there’s a risk of damage to the pump.
In short, this is the ‘slow but steady’ solution for thicker liquids.
FloRight Pump & Controls Keeps You Flowing
With more than 30 years of combined experience, FloRight Pump & Controls offers the best in service, repairs, and pump distribution across Arizona. We have the expertise to install and maintain pumps of all sizes, at any level of complexity, including modern automated/Industry 4.0 systems.
When you need excellent pumping for your construction project, contact FloRightPump & Controls.