How Water Pump Works
Water pumps and dewatering systems are water control equipment that utilise pumping or evaporation to remove or drain various forms of water from construction sites, riverbeds, mine shafts, underground metro networks, tunnels, caisson, and even residential buildings. For many sites, these systems are critical during rainy season, periods of heavy rain, or for site in flood zones, as groundwater and rain can flood an entire site within just a few hours, causing delays, surface erosion, structural damage, downtime and more.
There are a few sorts of water pumps, including positive displacement pumps, centrifugal pumps, jet pumps, and submersible pumps. Some systems are installed to work continuously as a long-term solution, where they are ready to kick into action on notice, while others are utilised on and off or on a short-term basis (as equipment or service hire) typically after water penetration or damage has occurred.
How do water pumps work?
There are many different types of water pumps including positive displacement pumps and centrifugal pumps, which provide the same service, however operate in a different way. The core concept of a water pump is to use a motor to convert rotational energy or kinetic energy and turn it into energy for moving fluid or for fluid flow (hydrodynamic energy).
Centrifugal pumps work with an impeller, fluid enters through the rotating impeller and is expelled out through centrifugal force through the impeller’s tips. The process of this increases the velocity and pressure of the fluid and directs it toward the outlet of the pump. A type of centrifugal pump is a submersible pump, available for hire on the Ruinu General Merchants platform.
A positive displacement pump has an expanding cavity on the suction side of the machine and decreasing cavity that is located on the discharge side of the machine. The water pump works by alternatively filling the cavity and then displacing the fluid with each cycle having a constant volume no matter the pressure or the pump head that is used.
Although offering similar applications the main differenced between centrifugal water pumps and positive displacement pumps is that centrifugal pumps can have varying flow depending on the pressure of the type of pump head used compared to positive displacement pumps which can alter flow regardless of the system pressure or the head used. Another crucial difference is when a centrifugal pumps flow is reduced the viscosity is heightened compared to a positive displacement pump as when flow is increased so is viscosity.
What do water pumps do?
The main purpose of a water pumping system is to move water from one area to another. They are often applied to construction sites as a form of water extraction, assisting in the removal of water when excavating, at sewage plants, in flooded areas or when dealing with water wells and oil wells. Water pumps are not limited however to just construction sites, they can be utilized on residential sites, industrial sites or commercial sites assisting in dewatering purposes.
What water pump do I need?
When looking for the type of water pump that is correct for your task, you need to take into consideration the site of the operation, the size of the operation and the distance that is needed. All these factors can determine what water pumping system you require.
Water pump systems often have different hose lengths so be sure to check the distance you need covered, this is vital in dewatering a well or ground dewatering work. When operating over large distances adding a high head pump is a great option. Although when considering if there is elevation difference between the pump and the fluid a submersible pump would be best.
A water pump at work
Considering the site location can also determine what water pump is best to use. When operating in built up or residential areas, there may be noise restrictions and therefore a silenced water pump would be optimal. Read along to learn more on how these affordable water pump works for you.
With many water pump suppliers in Kenya, Ruinu General Merchants can assist you in finding the right supplier for you. Simply contact a supplier in your local area to find the right correct water pump for your next project.
What are the different types of water pumps?
Ground Dewatering Systems
Ground dewatering systems are typically used on construction sites or in buildings that have floors below sea or groundwater level. The most common and simplest dewatering system is sump pumping, when an excavator installs dewatering sumps and groundwater is collected inside the sumps before being pumped away from the site. There are other specialists dewatering techniques that include relief walls, artificial recharge and siphon drains. However dependant on the site techniques will change in order to find the best ground dewatering system.
These systems are used to facilitate the temporary reduction of pore pressures or water levels, returning soil or basements back to dry, stable and safe surface conditions, particularly for excavation sites that are below the groundwater level. While this is a cost-effective method, ground loss and excessive seepage can be both time-consuming and expensive to deal with, and can cause instability of the ground. For this reason, pre-drainage dewatering systems are often used, and there are a number of setups which already have filtration devices installed, allowing you to avoid any water and silt problems. Water pumps work out a solution for you.
High Head Pumps
High head pumps are used on sites that require uphill fluid pumping or water pumping over long distances. Typically high head pumps can handle larger flows due to the heavy-duty nature of the pump and ability to provide high pressure water pumping.
If you are looking for a portable pumping system that can quickly pump water out of a boat, basement or water heater then the portable water pump is the best option. They are also referred to as portable water transfer pumps. These pumps can also assist in water pumping at residentially or on any site where you need to transfer water from area to another as they can increase line water pressure, assisting in irrigation of lawns and gardens.
Silenced pumps get their name to the low level of noise they produce when operating, recognized as ‘silent’ pumps. Often used on construction sites that require floodwater control, sewage applications or have excavation work in progress, these pumps offer a quiet solution. Having soundproof canopies, these pumps reduce the running noise of a typical water pump, whilst also offering a quality pump pressure.
Silenced pumps are perfect for construction sites located in residential areas or on worksites where noise has to be kept to a minimum.
Submersible pump systems or sub pumps are a water pumping device that has a hermetically sealed motor close that is attached to the pump body. This allows the pump to be submersed in the water. Regarded as more efficient that jet pumps, submersible pumps push fluid to the surface rather than pulling fluid. This method of water pumping has many advantages as it prevents pump cavitation. This is a problem that often occurs when there is an elevation difference between the fluid surface and the pump. Water Pump Works in helping you make work more easier as well as increasing efficiency.
Submersible pumps are usually lowered down a borehole, typically on residential, commercial and industrial sites that require water extraction. Common jobs that require a submersible pump include pumping in water wells or oil wells on offshore rigs or sewage plants. However applications can extend to drainage, sewage pumping, general industrial pumping and slurry pumping.
If you need to hire a water pump, Ruinu General Merchants can help! Our directory offers a large volume of water pump suppliers throughout Kenya. We offer a variety of pumps around Nairobi and country-wide! If you are unsure of the water pump that you require for your project, get in touch with us on +254 722 224688 or get rates in minutes here.