To equip the well, the use of reliable injection equipment is mandatory. Only with its help it is possible to transport water to the highway and at the same time maintain a constant pressure in the system. Among private craftsmen, submersible pumps for the Grundfos well deserve a good reputation. Minimum body diameters plus high performance are the main positive points of Danish equipment.
The device and principle of operation of borehole pumps Grundfos
Units from the Danish manufacturer have a similar device. Models differ only in technical characteristics. The pump casing is made of stainless steel alloyed with nickel and chrome. Depending on the modification of the device, it can be equipped with a single-phase or three-phase motor.
The Grundfos pump works due to a suction spiral (Archimedean screw). It is located directly in the device. Thanks to such a centrifugal impeller, the equipment can function in horizontal or vertical position.
When the pump is turned on, the screw rotates and thereby draws water into the storage chamber. Then he transportes it up, pushing it into the outlet pipe.
Grundfos pumps are designed for clean well water only. The permissible limit of impurities in some models is 50 g / m3.
Advantages and disadvantages
For pumps from a Danish manufacturer, these advantages are characteristic:
- minimum flask sections of 76 mm, which allows you to install the device even in a very narrow casing;
- the presence of protection functions against water hammer, overheating, idling;
- simple installation;
- high performance and pressure;
- resistance to aggressive environments;
- economical energy consumption;
- the ability to control the frequency of rotation of the impeller of the pump;
- the presence of a check valve in the configuration;
- the absence of vibrations, and therefore, the exclusion of damage to the casing or misfolding the bottom of the source;
- optimal warranty period - 5 years.
The only drawback of the equipment is its price. Some masters consider it high. Although the cost of the pump is fully justified.
Lineup and Specifications
Three main types of Grundfos pumping equipment for wells are presented on the market:
- SP series
- SQ lineup;
- SQE series.
The first line is pumps with a flask diameter of 4 inches (100 mm). This severely limits the capabilities of the equipment in a narrow casing.
The SQE series has the same specifications as the SQ line. But at the same time, all models of the series are equipped with a frequency converter. This allows you to maintain a stable pressure in the system. When installing a hydraulic accumulator, pumps of this series are especially good for organizing autonomous water supply of a country house.
The SQ series is ideal for domestic use.
All models of units are marked in this sequence - the name of the series, capacity (m3 / h), pressure indicator. For example, the SQ 1-50 model is characterized by a water supply of up to 1 m3 / h to a height of 50 m.
Technical characteristics of modifications of the pumps of the SQ series:
- SQ 1. The maximum pressure in the line is from 50 to 65 m. Productivity - 1 m3 / hour. Average power - 1,650 watts.
- SQ 2. Allows you to generate a pressure value of 55, 70, 85, 115 m. Productivity - about 60 l / min. Power - 1,650 watts.
- SQ 3. The head pressure is 65, 80, 95, 105 m. Productivity is about 60 l / min. Power - 2,320 watts. Pumps of this series can even pump contaminated ground water.
- SQ 5.It allows to supply up to 5 m3 of water per hour from a depth of up to 70 meters. The weight of the model is only 6.4 kg.
When choosing a Grundfos submersible pump, it is important to consider well performance: casing diameter, flow rate and source depth.
How to choose a pump
When buying a centrifugal device Grundfos you need to rely on such parameters:
- The pressure. It is determined in total for all vertical and horizontal sections of the pipeline. Each 10 m horizontal is equal to 1 m head.
- The amount of water needed for a family per day. It is necessary to summarize the displacement consumed by each sanitary point per hour.
- Static and dynamic water levels in the well.
- The rate of the source.
When taking into account the flow rate parameters, it is necessary to ensure that the pump performance does not exceed it. Otherwise, the well will drain quickly.
The price of deep pumps for Grundfos wells varies depending on the series and the technical characteristics of the model. In the markets of Moscow, the Danish unit can be bought for an amount from 25,700 to 113,000 rubles. The price may also vary depending on the region of sales in Russia.
