Water pumps are indispensable machines to construction projects, as well as homes and businesses. Used to move liquids, dewater, and remove excess water, water pumps pay a considerable value to activities that require the quick transport of water without sacrificing project deliverables. Before you consider looking for Davey pumps for sale, it is imperative to learn more about water pumps.
Types of Water Pumps
Water pumps may be electric, gas-powered, hydraulic, or manual. But there are two general types of pumps: centrifugal pumps and positive displacement pumps. Each type is engineered to transfer water constantly.
Centrifugal water pumps have an impeller, which rotates to move water via a pressurized discharged flow. There are different models for these water pumps. There is the standard model, the trash model, and the submersible model. Positive displacement water pumps are the types of pumps that are most mechanically built. They transfer liquids in a fixed manner as its adjustable diaphragm contracts and expands.
How Centrifugal Pumps Work
Centrifugal pumps are very flexible in terms of use. They can transport most liquids, even those with very low viscosity. In smaller projects such as residential pumping activities, a standard model, the least expensive of all pumps, is enough to do the job, whether the project is to drain pools or remove standing water.
Apart from dewatering, centrifugal pumps can be utilized in water system-related activities and in general construction. They can pump water to buildings and supplement hydro-pneumatic devices with zero suction lift requirements. These pumps can also be used in pumping water from common wells or boosting pressure in pipelines. They also serve as a reliable source of pressure used in fire protection applications.
Centrifugal pumps can pose a challenge to some users. Some models may need a recirculating solution to avoid overheating. More so, these pumps need to be conditioned first and loaded with pumped fluid so as to work accordingly. Unlike the relatively stronger positive displacement pumps, a centrifugal pump’s impeller can wear over time when used with liquids carrying small solid particles. So it is best to use these pumps to applications they are fit best.
How Positive Displacement Pumps Work
Normally, these pumps are used in industries where large volumes of liquids are to be moved. The bioechemical, petrochemical, and bioprocess industries are the usual industries that use positive displacement water pumps. Highly viscous liquids and liquids with sensitive solids are best pumped by positive displacement pumps.
Positive displacement water pumps, compared to centrifugal pumps, are very efficient in liquid transfer. This is due to the fact that they can take the air out from the pipelines, removing any need to compress the air. This extra capability shows how positive displacement pumps are best used in heavier liquid transfer processes.
When it comes to issues, these types of pumps may not be as handy as a centrifugal pump. It requires a small space between the pump and the outer part of the equipment. This leads to a slower rotation. If the speed is notched higher or faster, it may wear the liquids away, affecting the productivity of the pump.
When choosing a water pump, make sure that you know what type is best for your project. If the project demands less power and effort to move liquids, a centrifugal pump is the better choice. For larger applications that ask for efficiency, the positive displacement pumps are preferred.
