Submersible pumps for water: how to choose and how to set

By Admin | Garden And Buildings / Landscape Design
11 May 2016

Often, water garden and suburban areas is poor.Basically, water is extracted from boreholes and wells.Many site owners, caring for convenience, try to automate this process using a submersible pump for water.Some pumps are mounted on top (surface), and the other is submerged under water (immersion).Submersible pumps for water are mostly used for:

  • water supply to the water supply system;
  • pumping water;
  • organization of irrigation systems;
  • to create artificial streams, waterfalls and fountains;
  • for drainage works.

Content

The types of submersible pumps may include drainage and sewage pumps and submersible pumps garden, which is used for irrigation and watering.To drain the dirty water with a lot of garbage and pools of sewage wells used Submersible Pump drain.Fecal pumps are commonly used for cleaning cesspools, thorough cleaning of the wells fr

om the clay and sand, etc.These pumps can pump liquid containing particles of impurities up to 5 cm. In suburban areas, especially in spring, it may be necessary to pump the water quickly out of the pool, drain the basement, to pump water out of the basement, often not very clean.

good helper in this situation would be a submersible pump for dirty water.Submersible water pump on the principle of action can be a centrifugal or vibration.Submersible pump in a selected vibratory if required inexpensive, with small capacity, but a large depth of the suction unit, which can be lowered into the well.A more perfect from a practical and technical point of view, it is a centrifugal water pump.It does not create noise and rattle as vibration, it allows its use not only in the wells and in wells.Performance of domestic centrifugal pump is much higher.In turn divided into centrifugal vortex pumps and screw.

  • worm pump has a simple structure and is designed to pump clean water or a liquid containing impurities (no more than 300 g / m).It differs, often, low cost and reliability.

    Model worm pump
    typical screw pump is used to supply water to the system without contaminating inclusions
  • Centrifugal-vortex submersible pump at high power has a high pressure.The lack of it - excessive sensitivity to impurities in the liquid.Under the influence of particulate matter and the wheel body (blades) are subject to intense wear, the clearance between them becomes greater and the efficiency is markedly reduced.

    Options centrifugal submersible pumps
    Models centrifugal submersible pumps

device submersible pump ↑

submersible pump device depends on the model.The centrifugal pump has an impeller with blades enclosed in the housing and coupled to the motor shaft.Water, during rotation of the impeller, the pump and fills the centrifugal force is pushed out of the housing, which is in the form of a snail shell, in the pipe and it is supplied to the tank or directly to water extraction points.Upon rotation of the impeller in the pipe which serves to suction, a vacuum is created, so water flows continuously in the pipeline.

Internal structure of the submersible pump
Internals submersible pump (click to enlarge)

have drainage pump working chamber is fairly wide, it allows impurities to pass freely through it, without stopping and without prejudice to the mechanism.Since the suction opening is in the bottom of the unit, it is able to pump almost all of the liquid, need only to lower it to the bottom of the container.Additional convenience is provided by the built in automatic devices that disable the engine at the "dry" or overheating.The float switch, which is equipped with submersible pumps of the plan allows the unit to run in their own work, if necessary.Pumps for dirty water, often has an impeller made of cast iron or stainless steel.

How to choose the best option?↑

Pump selection should be based on knowledge about the planned level of water consumption and, consequently, the required pressure.There is quite a simple formula, which will answer the question of how to select the required power submersible pump: Ntreb = Ndine + Nnap in which Ntreb - the required water pressure;Ndine - Dynamic water level (the distance to the water level above the ground when the pump; Nnap - the distance to the point of consumption from wells. Thus, choosing submersible pumps to testify, it is necessary first of all to determine the operating parameters: consumption (Q) and head (H). Water consumption can be easily determined if we summarize the performance of all water intake points and to consider the possibility of simultaneous use. Simplified calculation can be done using the following rules:

  • sink - 60 l / h;
  • sinks - 500 l/ h;
  • bathroom - 300 l / h;
  • shower - 500 l / h;
  • cistern - 83 l / h;
  • tap for irrigation - 1080 l / h (flow depends on the method and intensity of irrigation);
  • bath, sauna - about 1,000 l / h.

Consider also implies that the summer is often a need for watering the garden, and it affects the level of water consumption.Furthermore, the number of users is set points and water intake.When selecting a pump for dirty water, it is important to decide where and for what purpose it will be used.The degree of contamination of water supplied - an important criterion.The passport of each said article, a particle size it can be pumped, together with water, without prejudice to the mechanism.Many believe that the 10 mm to give enough.

Since the drain pump is not used to supply water upwards, and pressure they often small, in the range of 10 meters, but the horizontal filing this figure can be multiplied by 10. Current models of drainage pumps are virtually maintenance in the complex.The owner himself could cope with change and Cleaning the filter.

Connection and installation of a submersible pump ↑

noticed, unfortunately, that the submersible pumps often fail.The reason, however, is not always in low quality equipment, but more often is that the selection of equipment project design and installation of a submersible pump is not always carried out by professionals.Sometimes the connection diagram of the submersible pump is made by the owners of private houses, which have a very vague idea of ​​how it should look.Few people know that the pump motor, which is matched with plenty of power can burn very quickly, if at the time of installation and configuration of the entire system does not bring the pump in the optimal operating range.Therefore, cheaper and more rational to choose the pump, taking into account the real needs and with the direct assistance of experts.

diagram of a typical installation of all submersible pump

How to install a submersible pump?When installing any pump must align its operating point in all operating modes that are possible.If you enter it into operation is measured:

  • feed consumption, for that determines the speed at which filled every container of known volume;
  • created pressure (it is determined by the pressure gauge reading);
  • current consumption, measured with special forceps.

The data carefully checked against passport characteristics.With a significant excess of the operating parameters must be taken: cover latch to create a resistance to set the correct operating point - the middle of characteristics Q (H).All these manipulations is not necessary to produce their own.Installation, as well as selection of the pump must be prepared to carry out an expert, only then can we count on its durability and performance.

Video: details submersible units ↑

In the video of the submersible pump a lot of useful information about the design and operational features of the units that are used to supply water into the water supply.