Discover the world of pumps
Water pumps are essential in modern society, where they play a crucial role in the transport of liquids. These versatile devices enable liquids to be moved by creating a pressure difference, a fundamental principle that is applied in a wide range of sectors, like horticulture, construction, industry and (semi) government.
Variety of water pumps and their operating principles
The world of pumps is diverse, with different types classified according to their operating principle, the medium they pump, their application, configuration, construction type, and material. Below is a detailed look at some prominent types:
Positive displacement pump
This category of positive displacement pumps includes water pumps that move liquid by alternately enlarging and reducing part of the pump chamber. Within this group, we find rotary pumps, ideal for precise dosing, and pumps with a reciprocating motion, such as diaphragm pumps and plunger pumps, which excel at moving viscous liquids.
Circulation pump
Circulation pumps are essential for the efficient distribution of heat or cold in circulation systems. In horticulture, they regulate the temperature in greenhouses. Circulation pumps operate in a closed system. Circulation pumps, also known as heating pumps, ensure constant circulation of heated or cooled water. Van der Ende Group has its own line of circulation pumps from Lowara.
Booster pump
The booster and high pressure pumps ensure constant water pressure in industrial applications and commercial buildings. They are used for water supply in tall buildings, irrigation systems, and industrial processes. By increasing pressure and providing automatic control, they offer reliable performance and optimize water distribution. This makes them essential for companies that need stable water pressure for efficient operation and increased productivity. Van der Ende Group has self-developed a 1– and 3-phase hydrophore unit that ensures constant pressure for multi-story buildings under construction.
Submersible pump
The submersible pump is a crucial tool for effective water management. This electrically powered pump is designed for draining basements and construction pits, but can be used in many more locations. This because it is very easy to connect and often comes with a float switch that automatically turns the pump on when the water level gets too high. Van der Ende Group is a major stockist of submersible pumps. These submersible pumps are high quality and come from the brands Lowara and Grindex.
Sewage pump
sewage pumps are specially designed to pump water that is contaminated with solids such as sand, sludge, leaves, or waste particles. They are widely used in construction, industry, agriculture, and sewage treatment. Thanks to robust materials and powerful motors, these pumps can easily handle heavily contaminated water where standard pumps fail. There are various types, such as submersible, vortex, and sewage pumps, each suitable for specific applications. Van der Ende Group supplies dirty water pumps from Lowara, Grindex, Flygt, and Aeonpump, among others. While Lowara and Grindex focus on submersible applications, Aeonpump offers mobile sewage pumps with diesel or electric motors, ideal for flexible use in locations such as sewer projects or construction sites.
Multistage pump
Multistage pumps are pumps with multiple impeller stages, enabling them to generate higher pressure than single-impeller pumps. They are essential in applications that require high pressure, such as water distribution, irrigation systems, and in the oil and gas industry. Due to their efficiency and power, multistage pumps are ideal for moving liquids over long distances or to great heights.
Centrifugal pump
Centrifugal pumps are among the most commonly used pump types in industry thanks to their simplicity, reliability, and wide range of applications. These pumps operate on the basis of centrifugal force: a rapidly rotating impeller pressurizes the liquid and propels it away from the center via an outlet. This makes them ideal for pumping large quantities of water at low to medium pressure. Centrifugal pumps are used in a wide range of sectors, such as horticulture, industry, construction and contracting, and (semi-)government. Their modular design makes them easy to maintain and adaptable to different liquids and flow rates. Van der Ende Group supplies centrifugal pumps from renowned brands such as Lowara and offers customized solutions, including for systems with multiple pumps or specific pressure and flow requirements. Thanks to their high efficiency and long service life, centrifugal pumps are a core component in many water technology installations.
Self-priming pump
In addition to the standard pump types, Van der Ende Group has also developed a self-priming centrifugal pump that can remove air and gases from the suction line, reducing the need for manual priming. These pumps significantly increase the efficiency and reliability of liquid transport processes.
The crucial factors for pump selection and installation
Pump selection and installation are essential steps in ensuring efficiency and reliability in various industries. Pumps require careful selection and installation to ensure optimal performance. This text highlights the most important considerations when choosing the right pump. Van der Ende Group also has its own pump selection tool, which displays all pumps that fall under the selection after selecting the right pump and desired sector.
Capacity and head: the basics
The capacity of a pump, expressed in m³/hour or l/min, indicates the amount of liquid pumped per unit of time. In addition, the head, the pressure difference between the suction and discharge sides of the pump is crucial. Together, these factors determine the suitability of a pump for a specific application, based on the required fluid displacement and the resistance that must be overcome.
Viscosity: a determining factor
Viscosity, or the resistance of a fluid to flow, is a critical parameter in pump selection. High-viscosity fluids require pumps designed to handle viscous media. Here, van der Ende Group supplies the Jabsco and Flojet brands, which are global leaders in the industry. These pumps can handle very high viscosities. On the other end of the spectrum, centrifugal pumps and piston pumps are better suited for low-viscosity liquids such as water.
Pipe resistance and installation NPSH
Pipe resistance, caused by the physical properties and configuration of the piping system, affects the pressure required to move liquid through the system. Careful planning and calculation of the installation NPSH, taking into account factors such as the pump setup and the temperature of the liquid, are necessary to ensure efficient and trouble-free operation. Van der Ende Group can take care of this for you.
Sectors
Pumps are used in many sectors. Van der Ende Group supplies four different sectors: horticulture, construction/contracting, industry, and (semi-)government. It is crucial for these sectors to use water pumps because of their versatility in water management. In construction and contracting, they are widely used to keep construction sites dry, while in horticulture, water pumps are necessary for irrigation systems. Industrial applications range from cooling machines to process water treatment. And for semi-governmental organizations, water pumps play an important role in flood control and water purification.
The importance of shaft seals and material choices in pump technology
Efficient pump operation is crucial for many industries. Central to this efficiency are the shaft seals and the right material choices. These components are essential for preventing leaks, minimizing maintenance, and extending the service life of the pump.
Shaft seals
The shaft seal, where the pump shaft leaves the pump housing. Modern pump technologies often use mechanical shaft seals because of their reliability and durability. These consist of a rotating part that turns with the shaft, a stationary part that is mounted in the housing, and a spring element that presses these two parts together. The materials used, such as Viton® FPM, EPDM, and NBR, are specially selected for their resistance to high temperatures and chemicals, making them suitable for a wide range of applications.
Material choices: adapted to the fluid
The choice of materials for pumps and their components, such as the impeller, is closely linked to the properties of the fluid to be pumped. The pH value is an important indicator; for example, strong acids are better suited to stainless steel 316, while virtually neutral fluids are often processed in cast iron or steel pumps. These material choices directly influence the efficiency and durability of the pump.
Importance of expertise in pump technology
Selecting the right shaft seal and materials requires in-depth knowledge of pump technologies and the applications for which they are intended. Experts in this field can add significant value by extending the life of the equipment and maximizing operational efficiency. Understanding the unique properties of different materials and how they react under specific operating conditions is crucial. Van der Ende Group can advise you on this. After more than 40 years of knowledge and experience, we can call ourselves pump specialists and guide you in this area. If you are interested in one of our many pumps or other products, please feel free to contact us, we will be happy to help you.
Cavitation
Cavitation is a phenomenon in which air bubbles or vapors in a liquid implode, which often occurs when water pumps are not operating properly. This can cause serious damage to the impeller and other parts of the pump due to violent shock waves and erosion. Choosing the right pump and operating it correctly are essential to prevent cavitation. This requires technical knowledge to keep the pump within its optimal operating range, taking into account factors such as pressure, fluid properties, and flow rate. Expert selection and operation are crucial to maximize the efficiency and service life of the pump.
Van der Ende Group
Van der Ende Group supplies a wide range of pumps worldwide in multiple sectors. These pumps are available in multiple materials, drives, delivery heads, capacities, and brands. We have a large team ready to work with you and take care of everything for you.
