Circulation pump for heating private houses: selection, installation

Circulation pump heating private houses It is a required element of the system with forced circulation coolant. Thanks to his presence manages to provide uniform heating radiators in every room of a private house. We offer to meet with the types and characteristics of the equipment, as well as with reliable manufacturers and popular models. The editors of the online magazine HouseChief.ru prepared a review article on the advantages and disadvantages of this equipment, with description of popular models and the recommendations of experts in the selection of the best modifications of the circulation pump heating.

Where a circulating pump is used for heating private houses

Heating systems There are two types: natural and forced circulation. The first type is relevant for homes, which squaring does not exceed 100 square meters. impossible even heating in larger areas of all radiators. The heating medium is a bad move through the pipeline, which would inevitably provoke a large heat loss.

Circulation pump, which is part of the heating system of the second type, ensures coolant flow on the heating system at a certain speed. During installation no need to control the bias of pipes which can have a smaller diameter. Due to the discharge circulation manages to ensure uniform heating of different points of the heating circuit, and as a result, all the rooms, regardless of their location relative to boiler. The circulation pump for hot water allows you to maintain water pressure at a given level.

Attention! Installing the circulation pump to optimize the maintenance costs of the heating system.

The design of the circulation pump for heating boiler

The design of the pumps heating boiler virtually identical. They consist of a body made of stainless steel alloy. Inside it is an electric motor, which is fixed to the shaft of the impeller. Various materials can be used for its manufacturing. Due to the rotation of the impeller (vane) in a special chamber (cochlea) provided motion by elements coolant heating system.

The principle of operation of the circulation pump

The principle of operation of the circulation pump based on the use of centrifugal scheme. Spinning impeller discards incoming coolant flow to the chamber edges. The centrifugal force generated by the rotation of the wheel in the center creates a dead area. At the exit pressure increases. This is sufficient to ensure a stable circulation of the heating circuit flow.

The dependence of the principle of the heating system and pump selection

With proper selection of the circulation pump in the heating costs are considerably reduced. When choosing an appropriate model should focus on the type of heating system, as well as its characteristics. Natural circulation systems are unable to effectively distribute the heat that will inevitably lead to the fact that radiators some rooms will be slightly warm, but in the other - hot. properly selected pump is able to create sufficient pressure for the uniform heating of the heating circuit.

Open heating system equipped with a circulation pump expansion tank. Availability bypass prevents disconnection heating in the absence of light. In closed systems the coolant amount remains the same, allowing more quality to choose the model of pump.

Types of circulating pumps for heating systems

Manufacturers offer equipment with various designs, determining the procedure for its operation and maintenance. We offer to meet with the existing species and their distinctive features.

"Dry" pumps

Name of equipment is dictated by its structural features. Heat transfer fluid is in contact only with the impeller. The rotor is located in a sealed housing, which does not fall into the liquid due to the installation of several O-rings. Circulating pumps of this kind have a sufficiently high efficiency, reaching 80%. They need regular maintenance, because of the incoming heat carrier solids adversely affect the sealing ring, causing depressurization of the rotor housing.

The average "dry" pumps can last for about 3 years. In the process, they are strong enough noise that may create some inconvenience during the operation. That is why they are almost not used in a private home heating system. However, in large networks, their installation cost is fully justified.

May be:

• horizontal;
• vertical;
• block.

The circulation pump with "wet" rotor

In devices of this type, and the coolant in contact with the impeller and the rotor. The metallic glass is sealed only electrical part with starter. Efficiency of the circulation pump with a "wet" rotor is about 50%. Such equipment does not require regular maintenance.

Comment

Sergei Kharitonov

Lead engineer for heating, ventilation and air conditioning "GK" Spetsstroy "

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"Depending on the model and operating conditions of the equipment with" wet "rotor is able to last for 5-10 years."

In the process, almost no noise, making them the best option for private home or apartment.

Specifications of circulation pumps for heating systems

Selecting a suitable model for a given contour is performed taking into account the technical characteristics of the circulation pump for heating systems. It is worth to pay attention to:

• performance, showing how the amount of fluid can pass through the pump per hour. Expressed in m³ / h. It depends on the hydraulic resistance;
• Head, which, in essence, is the hydraulic resistance. Characterized by the height that the water column can be raised;
• mounting dimensions. It depends on the diameter of the pipe and the installation site. With a lack of space is necessary to get the smallest circulation pump for heating;
• maximum temperature. Given that the circulation pump continuously pumps liquid heated to a certain temperature, the maximum value requirements to be met. At the low-end models the working fluid can be heated to a maximum of 90 ° C. The more expensive - to 130 ° C;
• manufacturer. The preferred option would be tested products manufacturers.

Not everyone knows how to pick up the circulation pump for heating. Table with reference data to help choose the right model.

How to choose a circulating pump for heating private houses

Characteristics of any equipment selected according to the conditions of its future operation. How to choose a pump for heating private houses? You can use look-up tables, which are given the necessary information, depending on the structure of the quadrature. If such an option is not satisfied, it is necessary to perform the calculation, which will provide more accurate values.

Calculation of pump performance

The pump capacity can be calculated by the following formula:

G = M /? T × CtWhere:

• M - power boilerWhich will be used for home heating, W;
• ? T - the temperature drop in the heating circuit;
• FROMt - a coefficient depending on the specific heat of the coolant.

Power boiler It can be determined based on the fact that for every m² cottage or country house required 100 watts of power, for apartment buildings - 70 watts. In the presence of additional thermal insulation of external walls is obtained by multiplying the power of 50 kW per square the house. For cold regions the estimated value of private homes increased to 175 W, for multi-storey - up to 101 watts.

If calculation of the performance of the circulation pump seems too time consuming, we suggest to use a calculator. Choosing the desired position and entering the missing data, you can get the desired value.

Calculator for calculating the performance of the circulation pump

pressure device

From this parameter depends on whether the pump is able to overcome the force exerted by the flow resistance of the heating system. If the vertical lifting compensated force generated on the downlink path sections, the pipes, valves, heat exchangers and other elements create considerable resistance. This greatly complicates the procedure of calculation.

The pressure of the circulation pump is determined by multiplying a heating circuit Length resistivity pipe and a coefficient depending on the number of shut-off valves, thermostats and other elements of the system.

Tip! To get the desired value, use the calculator, which allows to take into account all the nuances.

Offer a respectable readers use specially developed by our team of calculator.

Calculator for calculating the circulating pump head

Calculation of the power of the circulation pump for heating systems

For bigger circulating pump for the heating system of calculation you can use the following formula:

N = Nto / DTwhere

• N - the desired value;
• Nto - power boilerUsed to heat your home;
• DT- temperature difference in the forward and return flow. In most systems, does not exceed 15 ° C.

More on that note

When choosing an appropriate model should also pay attention to the time of the circulation pump. For periodical switching equipment in the winter is fairly inexpensive model with a small capacity. In this case, the pump will perform a supporting function. Over long pipeline without coolant circulation pump will move slowly. For such a system will require a powerful model which allows continuous operation.

Manufacturers offer units, the design concept which allows you to change their speed. In most cases we are talking about a three-stage adjustment. The user can choose the optimal mode of operation of the heating system, depending on weather conditions. Some models have an automatic power control system.

When choosing also pay attention to:

• the maximum pressure in the system. In private houses it seldom exceed 4 atm (at normal operation - about 2 atm);
• material body. Preferred is iron. Products with resistant plastic housing less expensive;
• connecting dimensions. You may need an adapter;
• the presence and type of protection. Particularly relevant in overheat protection. At its presence the life of the pump increases significantly.

Overview manufacturers

Price pump for heating and its characteristics depend directly from a trademark under which it is made. The most popular among buyers enjoy the products:

• Grundfos, Which accounts for half of pumping equipment sold. All models are highly reliable manufacturer. Implement innovative solutions help reduce operational costs. German pumps can serve at least 10 years;
• Wilo. Under the German brand pumps are available in several countries. The manufacturer offers a wide range;
• DAB. Italian manufacturer offering high quality circulating equipment. The introduction in 2002 of innovative solutions possible to reduce noise during operation and improve performance;
• Oasis. Equipment going on in China, the cost is affordable. Adherence to the process requirements in the manufacturing process ensures that the actual characteristics of the application;
• Wester. Quality equipment for heating and hot water systems. Presented in a limited range.

The best models

Choice draws attention to the equipment whose technical characteristics have been tested by time and by many consumers. We offer to meet with the most popular models.

GRUNDFOS ALPHA2 25-60 180 Circulation pump

Qualitative model, characterized by a high build quality. Circulation pump GRUNDFOS ALPHA2 25-60 180 can operate in seven modes. Connection is made via a plug. To increase the lifetime of the device it is desirable to use uninterrupted power supply unit. The advantages of the model should include the following:

The only drawback is the high cost

The circulation pump Wilo Star-RS 25/4

Qualitative model with greater functionality. This pump is relevant for heating systems, water supply and ventilation. Long service life is ensured cast iron body and stainless steel shaft. Designed for pumping clean water. May be installed in a horizontal position. The circulation pump Wilo Star-RS 25/4 has a capacity of 3 m³ / h. It runs quietly.

The advantages include:

Among the shortcomings should be noted demands on a certain position during operation and the speed change inconvenience.

NC-caliber 15/6

Reliable trohskorostnaya model in cast iron housing from the budget of the series. Capable of maintaining performance at a sufficiently high temperature. It can be mounted in different positions. At a power of 90 W weighs 2.5 kg, and does not create noise during operation. It has a capacity of 2.5 m³ / hour.

The benefits should include:

Among the shortcomings should be noted low quality of assembly and manufacture of individual rotor elements of plastic.

JEELEX Compass 25-40

Trohskorostnoy pump without shaft seal. Using the special emulsion provides good lubrication and cooling of the engine. The circulation pump features low power consumption. Power unit - 65 watts. It creates a minimum of noise during operation. It can handle up to 3 m³ / hour. With its compact dimensions can be easily mounted to the heating system. The disadvantage is the sensitivity to the dirty water.

UNIPUMP UPC 25-40

The best option for the country house. It has a capacity of 100 watts. Cost effective equipment, virtually no noise during operation in harsh environments. Characterized by ease of maintenance. Quality assembly ensures a long service life. The disadvantage is the sensitivity to the external temperature.

Install the pump in a private home heating system - the basic nuances

The heating system should work steadily to ensure uniform heating of all rooms. To install a pump in a private home heating system should take into account a number of nuances. Mounting can be performed in the following sequence:

Photo	Description of work
	Select location for the circulating pump. Its better to be mounted on the return pipe in the vicinity of boiler. Drained coolant.
	Prepared and connect all the necessary elements. The pump should be installed in the operative position. Having dealt with how to properly put a circulating pump for heating, you can proceed to the next stage.
	cut part tubesOn the site where the installation will be carried out.
	successively welded and connect all the elements of the system.
	Colors all elements of the system.
	Translate taps into position.
	Select the desired mode.

Related article:

Heat pump for heating houses.Such a method of heating homes is organizing a myriad of controversy about the effectiveness and return on investment. Let's try to deal with it in a special publication.

Where is cheaper to buy a circulating pump for heating - price review

If you decide to buy a circulation pump for heating, we offer to meet with the prices for the most popular models:

Model	Features	The average price (as of March 2018), rub.
	Only pure water. Installation in any position.	1940
	Manual speed regulation. Head - 6 m.	5090
	Pressure - 8 m. Performance - 12.5 m³ / h.	4700
	Head - 6 m. Maximum pressure - 9 atm.	3700
	Head - 4 m. Productivity - 2.4 m³ / h.	2400
	Pressure - 16 m. Power - 750 Watts.	11600
	Pressure - 8 m. Maximum pressure - 10 bar.	8100

Knowing how the circulation pump to the heating system installation, it is simple to install on their own. Share in the comments, what model you prefer, and how to carry out installation.