Grundfos SQ borehole pumps. Grundfos SQ series well pumps Grundfos sq submersible well pump

To be fair, it should be noted that all SQ well pumps from Grundfos are available with a cable, the difference is that in some models it is 1.5 m, which implies additional installation, in others, it is preset and equal to the immersion depth of the pump. For example, in the Grundfos SQ 2-55 model the cable length is 60 m, which allows you to immediately install the equipment in the well.

The main advantage of purchasing a pump without a cable can be considered more affordable price, which is 30-40% lower than the fully equipped analogue. That's why financial issue is often decisive, but before you finally make a choice you should be aware of some literally “pitfalls” that need to be taken into account.

The cable pre-installed at the factory fully complies with the requirements for it, taking into account its place of operation: all connections are sealed, the materials used for its manufacture are safe and can be used in drinking water.

If you need to connect a cable to the pump, you will first have to correctly determine its cross-section and length and make a reliable and tight connection. Theoretically, this is not so difficult, but even if everything was done correctly and efficiently, during operation there may be some problems associated with the use of a protective coupling, which can be flooded or heat-shrinkable: it loses its tightness, which can lead to short-circuiting of wet terminals.

A constantly heating cable can also become a problem, and the cause of this phenomenon is insufficiently crimped or soldered contacts. And then events can develop according to chain reaction: the cable heats up - the casing coupling dries out, which leads to its depressurization - water comes into action and gets to the terminal box.

If an error occurs when determining the cable cross-section, then the voltage simply drops and, accordingly, the rotation speed decreases. When the voltage in the cable drops below 150 V, the pump is turned off by the built-in protection, and the consumer will have to wonder what happened to the device and, most often, he will think that the engine simply burned out. But to his delight, this is not so: it will be enough to change the cable and continue to use the pump.

Purchase and installation of Grundfos SQ pumps

If you plan to use a Grundfos SQ series pump for a well, you can buy it from Alfatep, and, if necessary, receive all the necessary advice from specialists. And even if you decide to purchase a device without a cable, our craftsmen will perform all the necessary work efficiently and correctly. installation work, and, if necessary, install equipment in a well or well.

You can view the entire range of SQ pumps from Grundfos and make a purchase on our online store website. If there is a need to deliver equipment to the site, our customers have our own transport service.

Well pumps The Grundfos SQ series are a three-inch (or 76 mm) device with multi-stage functionality. The main working elements are “floating” wheels, which have their own bearings made of ceramic to reduce friction, as well as single-phase Electrical engine pump having a permanent magnet, which provides sufficient high efficiency functionality with a wide power range.

This series of well pumps differs from other analogues in their smooth start, the presence of a number of protective functions from reverse with possible axial displacement, from overvoltage or voltage dips, overload or overheating of the structure is excluded.

Each model also comes with a detachable cable connector.

Well pumps of the Grundfos SQ series have effectively proven themselves as the main link in the creation reliable system water supply using wells or boreholes in the private sector, in suburban areas or at production facilities with an autonomous water supply. Their high efficiency allows you to solve problems of varying complexity, and a wide the lineup will help you choose optimal device according to the desired result.

• Absolute reliability of each model.

Taking into account the installation environment of the Grundfos SQ series well pump, the manufacturer uses highly corrosion-resistant stainless steel as the material for the unit body. Also in a number internal elements, in particular bearings, high-tech composite materials are also used, which reduce wear of the modules and increase their service life. These advantages of the Grundfos SQ series pumps are complemented by unique protective systems and perfect controllability of the process, eliminating any risk of emergency situations.

• A wide range of performance is the key to achieving high functional efficiency.

Modern body design of this unit lies in the absolute optimization of its design, which made it possible to achieve impressive efficiency in the hydraulic part combined with low electrical energy consumption.

• No installation required special tools and knowledge.

The pump is an elongated tubular structure, allowing for convenience to install the station in a horizontal or vertical design. Placement does not require any effort and can be done independently or with the assistance of specialists. The simplification also affected the operating conditions, which are based on the automatic operation of the device. This is also typical for service: In case of silting, dismantling is easy. The entire design is modular and easy to disassemble.

• Complete security.

The electric motor eliminates the risk of fuel substances and other substances getting into drinking water. chemical compounds. The included cable is made of special rubber used in Food Industry, which is confirmed by relevant certificates. There is no inconvenience associated with high noise operation.

• Additional control options.

The basis for controlling Grundfos SQ series pumps is complete automation of the entire process. In this case, the device independently selects the operating mode depending on operating conditions, maintaining high performance in combination with stable operation of the entire system without increasing energy costs.

The lineup

Three-inch series submersible pumps Grundfos SQ/SQE provides a wide performance range, making it easy to find a model that suits your individual requirements.

SQ/SQE pumps are compact, three-inch, multi-stage, centrifugal pumps that can be installed in even the narrowest wells ( minimum diameter boreholes 76 mm). Built-in electronic components increase the level of comfort and significantly facilitate the operation of pumps of the SQ/SQE series. They guarantee reliable water supply under all conditions.

These pumps are compact and easy to install, they are equipped with permanent magnet motors, provide high efficiency and a delivery head of up to 200 m.

If the SQE pump is connected to the Grundfos CU 301 control unit, this allows water to be supplied at constant pressure.

Purpose

SQ/SQE pumps are suitable for both continuous and intermittent operation, which corresponds to a large number types of destination:

• Innings groundwater– private houses, small water supply systems, small irrigation systems;
• Pumping liquid into tanks;
• Increased pressure;
• Environmental solutions – recovery pumping or sampling;
• Garages and gas stations.

Features and Benefits

• Dry running protection;
• High efficiency permanent magnet motor;
• Wear resistance of floating impellers;
• Protection against floating of impellers;
• High flow rate;
• Smooth start reduces engine wear;
• Overvoltage and undervoltage protection;
• Overload protection;
• Overheat protection.

Additional features of SQE pumps

• Adjustable engine speed (with connection to CU 301);
• Connection to CU 301 for two-way communication.

Downhole pumps "Grundfos SQ" are designed for individual water supply, small water supply and sprinkler installations, irrigation hydraulic systems. These are compact (three-inch) multistage centrifugal pumps that can be installed in a well whose diameter is slightly larger than the diameter of the pump. Used for pumping clean, non-aggressive liquids that do not contain solid particles or fibers, with temperatures from 0 to +35 °C (sand content of no more than 50 g/m3 is allowed).

Main Applications:
– for supplying groundwater to water supply systems;
– for private houses;
– for small waterworks;
– for irrigation systems;
– for pumping water into tanks.

The operating parts of the SQ pump are made of glass fiber reinforced polyamide (fiber content 30%). Thanks to the choice of such high-tech materials and design The pump achieves high efficiency with low energy consumption. Impellers with high-strength carbide bearings guarantee high wear resistance against abrasive components of the medium (sand) and significantly increase the service life of the pump. Starting the pump with very low back pressure can cause the impeller to move upward along the axis of the pump shaft (“floating”), which can lead to malfunction or even failure of the pump and electric motor. To protect against floating, the pump design includes an upper thrust bearing.

The pumps are equipped with a single-phase (1×200-240 V, 50/60 Hz) submersible electric motor “Grundfos MS 3” with a power of up to 1.85 kW, which is equipped with liquid-lubricated plain bearings. Built-in the electronic unit contains a frequency converter with soft start. The motor drive due to the built-in frequency converter provides constant speed rotation. Soft starting minimizes the risk of motor wear and prevents network overload during start-up. High efficiency is ensured by the use of permanent magnets in the electric motor. The engine is protected from overheating by a built-in temperature sensor, from overload by automatic speed control, and does not require additional protection. The pumps will be able to operate at low (up to 150 V) or high (up to 315 V) voltage electric current in the network, surges and voltage drops.

The modular design of the pump and motor makes installation and maintenance easy. SQ borehole pumps can be operated in a vertical, horizontal or inclined position, but should never be installed below horizontal plane relative to the position of the electric motor. Pumps can be immersed to a depth of up to 150 meters below water level. When installed vertically, the pump must be completely immersed in water; when installed horizontally, it must be 0.5 m below the dynamic water level. If there is a risk of contamination, the pump must be placed in a protective housing (accessory).

Main features and advantages of “SQ” well pumps:

• Groundwater supply for individual water supply
• Small pump diameter: 74mm
• Well diameter: from 76 mm
• Power: from 1.02 to 2.54 kW
• Supply: up to 9 m 3 /h
• Hydrostatic head: up to 237 m
• Temperature of the pumped liquid: from 0 to +35 °C
• Possibility of pumping drinking water
• High efficiency
• Increased wear resistance (stainless steel parts in contact with water)
• Floating impellers with protection against reverse axial movement
• Ceramic bearings
• Highly efficient single phase electric motor"MS 3" on permanent magnets, not requiring additional protection
• Low power consumption
• Constant rotation speed due to built-in frequency converter
• Function soft start(protection against water hammer in the system and network overload)
• Built-in motor protection (overload, overheat, voltage surge)
• Built-in dry-running protection
• Built-in check valve with spring
• Suction filter (anti-clogging)
• High flow rate
• Pressure pipe connection: 1¼˝ (models “SQ 1”, “SQ 2”, “SQ 3”) and 1½˝ (models “SQ 5”, “SQ 7”)
• Cable 1.5 m long (other lengths available on request)
• Easy installation and maintenance
• Reliable operation in any position (vertical, horizontal, inclined)
• Small size and weight
• Reliability and durability
• Can be installed into an existing water supply system

Grundfos SQ 1–80- 3-inch multi-stage well pump for water supply to residential buildings, pumping water from reservoirs, hydraulic irrigation systems and small waterworks. This surface pump with "floating" wheels, each of which has its own tungsten carbide/ceramic bearing.

Technical specifications Grundfos SQ 1–80

Power, kW - 0.73
Pressure, m water. Art. - 40-100
Max. pressure, m at Q=0 m3/hour - 108
Rated current, A - 230
Attach. size, G - 1 1/4”
Length, mm - 826
Weight, kg – 5.05
Warranty for pump Grundfos SQ 1-80 - 2 years

Features of the Grundfos SQ 1–80 pump

Soft start, protection against reverse axial displacement, overvoltage and voltage drop, protection against overload and overheating.
Single-phase permanent magnet motor provides optimum efficiency over a wide power range. The motor is supplied with a detachable cable connector.

Application of the Grundfos SQ 1–80 well pump

Grundfos SQ 1–80 pumps are designed for individual water supply, small waterworks, hydraulic irrigation systems and sprinkler systems.
The pump is designed for both long-term operation and intermittent operation. The pump is installed in well 3 (76 mm) manually, without the use of lifting devices.

Features of the Grundfos SQ 1–80 well pump

Small size and weight of the pump (pump diameter 74mm): ease of installation, savings on drilling and well construction;
- Built-in check valve: reliable operation pump in any position - vertical, horizontal, inclined; - “Floating” impellers;
- Ceramic bearings;
- Pump parts made of stainless steel and composite materials: increased wear resistance against sand, the ability to pump drinking water;
- Suction filter: protection against large foreign matter contained in the water;
- Permanent magnet motor: high efficiency, increased Starting torque, high power over a wide range of loads;
- Built-in dry-running protection: not required additional devices protection;
- Smooth running function: protection against water hammer in the system, built-in electric motor protection, protection against overheating and overload, the ability to work at low or high voltage, surges and surges in the voltage of the electric current in the network.

Pumped media

The Grundfos SQ 1–80 well pump pumps non-aggressive liquids that do not contain solid particles or fibers and have a sand content of less than 50 g/m3