Grundfos CR (grundfos / grundfos) is one of the series of basic pumps available on the market for industrial and domestic needs, which the company's engineers were able to expand and improve through the competent use of all the possibilities and modifications of the component modules. Pump technology from Grundfos has already proven itself on the market as reliable and highly efficient, compact and economical to operate.

The devices can be used with ordinary water and mildly corrosive liquids. The equipment has an anti-corrosion coating and ensures operation when high level pressure.

1 Advantages and applications of Grundfos technology

A wide range of application of the company's devices is ensured by competent technical solutions, which make it possible to use equipment at pressures up to 50 bar. This is facilitated not only by excellent quality rubber, but also by various modifications of voltage sources.

For the manufacture of the basic CR series, materials such as are used:

• cast iron grade EN GJL 200(for lineup CR);
• stainless steel of the two most durable grades AISI-304 and AISI-316(for model series CRI and CRN);
• titanium(for the Grundfos CRT range).

Optimization of technical solutions for parts that must be suitable for operation in various conditions make it possible to effectively use technology for:

• technical and drinking water supply systems;
• washing, filtration and purification systems;
• reverse osmosis systems and for use in sea water;
• pumping various aggressive materials such as alkalis and acids;
• use in swimming pools.

• equipment is regulated by frequency converters;
• the pressure plant is part of the global water supply system;
• pumping technology must become critical important element production process;
• requires stepwise cleaning or disinfection of large volumes of liquids.

1.1 Overview of the design of the Grundfos CR pump (video)

2 Models of pressure apparatus series CR

Industrial pumps Grundfos Series CR is available in four versions, depending on the materials used in the body parts and mechanisms. As mentioned above, these are two types of steel, cast iron and titanium.

The whole series differs in several more general characteristics... Each of the pumps in this series: centrifugal, vertical, with in-line suction technology... The peculiarity of this technology is that they can be mounted even in a single-pipe horizontally located pipeline system, regardless of whether the pressure-suction nozzles are on the same plane and what diameter they are.

The CR Series does not come with an engine speed governor as standard, which helps to correlate the desired level of performance with economy of energy use. But, the "E" series is an option that can be ordered by prior agreement with the supplier.

Also, by agreement of the parties, the CR series can be:

• horizontal version (H series);
• in horizontal design for belt drive (R series);
• high pressure version with increased speed shaft rotation (HS series);
• with magnetic drive (M series) or double mechanical seal;
• with increased cavitation reserve (K series);
• to work with high pressure without tie bolts (SF)
• with dry-running protection sensor (LiqTec);
• in explosion-proof design (ATEX).

Now let's take a closer look at the modifications of the CR series, the full lineup of which is as follows:

• Grundfos CR 5.1s, 1, 3;
• Grundfos CR 10,15,20;
• Grundfos CR 45, 32, 64, 90, 120, 150;
• Grundfos CRE;
• Grundfos CRN;
• Grundfos CRNE.

2.1 Grundfos CR 5 4

This is a vertical, multistage centrifugal technique, with a power of up to 0.55 kW, with a maximum generated pressure of up to 27 m, at an engine speed of up to 2900 rpm. The weight of the model is 24.7 kg, and the maximum flow rate is only 8.3 m³ per hour.

2.2 Grundfos CR 5 10

This one differs from the previous model in power, which is 1.5 kW, maximum head - up to 68 m, and weight - 39 kg. The rest of the characteristics are similar.

Both models are successfully used in enterprises for pumping drinking and technical fluids that do not enter into chemical reaction with the details of the apparatus. Fluids should not contain fibrous or solid particles. All devices of this model range can be used in the temperature range of liquids from -20 ° C to + 120 ° C and are designed for pressures from 0 to 16 bar.

2.3 Grundfos CR 15 3

Vertical multistage apparatus, with a power of 3.0 kW, with a maximum head of 42 meters at 2900 engine rpm. Weighs only 55 kg and operates over a liquid temperature range of -20 ° C to + 120 ° C at a maximum pressure of 16 bar.

The characteristics of this series differ from each other in weight, pressure and power, therefore, for convenience, we will describe a few more modifications:

• Grundfos CR 16: power 7.5 kW, weight 55 kg, head 83 meters;
• Grundfos CR 32 3: power 5.5 kW, weight 96.3 kg, head 59 meters;
• Grundfos CR 32 4: power 7.5 kW, weight 101 kg, head 78 meters;
• Grundfos CR 45 3 2: pump power 11 kW, weight 144 kg, head 67 meters;
• Grundfos CR 90 3: power 22 kW, weight 264 kg, head 103 meters.

As you can see, the range of pumps of the CR model range includes 13 standard sizes with different meanings flow rate, several hundred standard sizes with various values ​​of pressure, weight and power.

The pumps are equipped with a mechanical shaft seal that does not require Maintenance, connection flange and pipe couplings type PJE (Vitaulic). If we talk about the maximum efficiency, then it varies from 35 to 72% as the marking of the model in the series increases.

Motors of the Grundfos CR series are standard three-phase two-pole asynchronous closed type... Although, for devices with a power of up to 2.2 kW, a single-phase version can be ordered.

To select a pump from Grundfos, as well as to obtain additional information and materials, go to the selection program pumping equipment Grundfos Product Center (GPC). The link to the GPC is in the upper right side of the screen.

Product home page

If the language home page English, you can change it to Russian. For this:

• click on the Change settings line in the upper right part of the screen.
• find the Grundfos Product Center field in the menu and click Edit opposite the Regional settings name.
• select mutual language Grundfos Product Center programs (column Language - "Russian");
• in this submenu, you can also select a regional product line to exclude the choice of goods that are not sold in Russia (column Product range - "Russia")
• press the "OK" button and then the button to return to the product menu.

Under brief description product, there are two additional tabs - Subgroups and The documents.

The documents

Brochures - brief overview materials, which contain the main features and advantages of this equipment;

Installation and operating instructions - the most detailed Technical information... PIOI designation corresponds to the type of document created by Technical regulations Customs Union. If there is no document with the PIOI designation in the list, then use the document with the Multi Language designation, where Russian is among the proposed languages.

Service - Service documents such as Service Guide and Service Kit Catalog.

Catalogs - survey documents with flow and pressure curves, overall and installation dimensions.

Subgroups

On this tab, you can find the subtypes of this equipment, divided into more specific groups (for example, standard sizes of pumps, divided by the power of electric motors). If the type and name of the required product are known, then in the corresponding subsection you can click the button " Show subgroup»And go to the menu for selecting specific pumps of a subgroup.

ATTENTION !: In some products there is no division into subgroups and the general tab immediately opens a menu for selecting specific pumps.

If the name of the product is unknown, then you can approximately select the required range of equipment for the operating point, by pressing the button "Show Q&H".

More about the menu « Show subgroup" and " Show Q&H»:

Show subgroup

In the menu column “ Sort list", You can mark the known necessary parameters depending on the type of equipment (Rated power; Number of motor poles; Number of steps; Type of impeller; etc.) and narrow the search.

The set of parameters may vary depending on the type of equipment.

The list of equipment that meets the specified requirements will be displayed in the right window "All suitable results". By clicking on the icon with the magnifying glass, you can view the flow-pressure curve and the power curve of this model (if any).

ATTENTION !: The nominal operating point of the pump will not necessarily be the actual one, in the flow-pressure characteristics it is given for approximate purposes. In each individual case, a competent selection of pumping equipment is required.

For the convenience of viewing the flow rate and pressure characteristics, you can switch to the end-to-end view of the operating characteristics fields by pressing the " Specifications».

This transforms the All Applicable Results window from a list of models into a list of characteristic fields, making it easier to visually select the pump. You can return back to the textual listing of models using the button " List».

Show Q&H

This menu is only available for products divided into subgroups and allows you to select an approximate duty point that lies within the range of this subgroup of pumps. This can be done either on the flow-pressure characteristic on the right, or by selecting the required pump parameters in the interactive menu on the right.

In the drop-down submenu "Liquids" you can select the parameters of the pumped liquid, which will be taken into account when selecting the pump.

After entering the required parameters and pressing the "Sumbit" button, the GPC will display the most optimal options for specific operating parameters.

Grundfos CRT vertical multistage centrifugal pumps

Pumped liquid: Explosion-proof, free of abrasive and fibrous inclusions, chemically neutral to pump materials.
For pumping chemically aggressive liquids, it is necessary to select the appropriate combination of pump materials that are resistant to the operating medium.
Material: Titanium flow path.
Mechanical seal: Friction pair tungsten carbide / tungsten carbide, elastomers EPDM (AUUE), Viton (AUUV) on request.
Connection type: Victaulic coupling (PJE).
Rated voltage: Up to 1.5 kW (inclusive): 3 x 220-240D / 380-415Y V, 2.2 kW to 5.5 kW: 3 x 380-415D V, 7.5 kW to 18.5 kW: 3 x 380-415D / 660-690Y V, 1x230 V - on request.
Rated frequency: 50 Hz.
Degree of protection: IP55.
Energy efficiency class: From 0.75 kW (inclusive) IE3.
Rotational speed: 2900 rpm.

The Grundfos CR 20-3, CR 3-10, CR 5-5, CR 10-3 pump is endowed with high efficiency. Compactness is another characteristic of the CR 10-10.

The Grundfos CR 10-4, CR 10-6, CR 15 4, CR 15-1, CR 15-5 pump and other models of this type allow rational use of space at the expense of their small size... Grundfos centrifugal pumps of the CR 1-2, CR 1-3n, CR 1-4 series are distinguished by characteristics (prices, power, service life), which are optimal for any working conditions.

The pump Grundfos CRЕ, CR 32-2, CR 45-2 2, CR 45-2, CR 45-3 are used in the field of water supply, water treatment, air conditioning. In addition, models such as Grundfos CR 1-3 n, CR 1-17, CR 1-10, CR 3-4, CR 5-1, CR 5-10 are integrated into fire fighting mechanisms and boiler supply systems.

DESCRIPTION

Vertical, multistage centrifugal pump CR Grundfos with in-line suction and discharge so that it can be installed horizontally one-pipe system... Material of pump parts in contact with liquid, high quality stainless steel. The cartridge shaft seal provides high reliability, assembly safety, easy maintenance and accessibility. The pump consists of a base and a head. The intermediate chambers and the cylindrical casing are connected to each other, as well as to the base and the pump head by means of tie bolts. Rotation is transmitted through a split coupling. Pipeline connection with DIN-ANSI-JIS flange combination.
The pump is equipped asynchronous motor on feet, air-cooled.
CR, CRI, CRN pumps are supplied with a standard asynchronous two-pole, closed-type, fan-cooled electric motor. All pumps are equipped with a three-phase MG motor as standard. For pumps with a power of 0.37-2.2 kW, a version with a single-phase electric motor (1x220-230 / 240) is possible.
Single-phase motors have a built-in thermal relay for overload protection.
Three-phase motors must be connected to a motor starter in accordance with local codes and ordinances.
Three-phase electric motors from Grundfos with a power of 3 kW or more have a built-in thermistor (PTC).

Areas of use:
filtration and pumping of water for water supply stations;
distribution of water from water supply stations;
pressure increase in main pipelines;
pressure increase in water supply systems of high-rise buildings, hotel complexes etc.
Pressure increase:
in cold and hot water supply systems for technological purposes;
at car washes;
in fire extinguishing systems;
in washing plants and sewage treatment plants.
Pumping:
in cooling systems, air conditioning systems;
in the cooling systems of the tool of metal-cutting machines (supply of cutting fluid);
fish farming;
solutions of oils and alcohols;
weak solutions of acids and alkalis;
hydro-reclamation of fields (irrigation, watering)