Why do we need circulating pumps? Which ones are the best? You have a house that should be warm. Comfortable temperature in the home is provided by the heating system, which without a circulating pump will not work fully. This unit forcibly overtakes hot water, thereby providing the desired microclimate in all rooms. Read the article and find out more.
Content:
The best legendary circulating pumps for heating, hot water, air conditioning and air cooling
Grundfos UPS - famous circulation pumps
Among the UPS version of the execution 100 models are especially popular: 25-40, 25-60, 25-80; 32-40, 32-60, 32-80 with a flow rate of 3 ÷ 11 m3 / h and a pressure of 4 ÷ 8 m.
Units from Denmark are equipped with an asynchronous electric motor, a 3-speed switch and a housing: cast iron - for heating; from a stainless steel - for GVS. The rotor is separated from the stator by a sleeve.
Installation is performed in open and closed systems - horizontally / vertically. Bearings are lubricated by the pumped liquid.
Pros:
- low power consumption: a maximum of 45 W in UPS 25-40 to 220 W in UPS 32-80;
- wear resistance and reliability: used stainless sleeve, ceramic bearings, composite wheel;
- quiet operation: noise power does not exceed 43 dB;
- wide limits of fluid temperature: from ‒25 / + 2 to +110 ° С;
- simplicity of installation and operation, unpretentiousness in service;
- compactness (assembly length - 18 cm) and lightness (weight - from 2.6 to 4.8 kg);
- durability: the service life of the best Grundfos UPS heating circulating pumps is from 10 years, the warranty is 36 months.
Minuses:
- no power cable;
- relatively high prices: buy a Grundfos UPS circulating pump of these models is available for 4.5 ÷ 16.4 thousand rubles;
- popular, but not the newest devices on the market.
Wilo Star-RS - non-killing circulation pumps
Star-RS series, by analogy with the previous units, are centrifugal surface pumps with a "wet" rotor. Top models of the German manufacturer: 25/4 and 25/6 with a supply of 3 and 3.5 m3 / h, head - 4 and 5.5 m, power consumption - 48 and 84 watts.
Body material - cast iron. Features of installation: the shaft is located horizontally, the connection is made through spring terminals. During operation, the motor is insensitive to blocking currents.
Pros:
- economy: power is set to 1 of 3 reasonable positions;
- no overheating: due to the “wet” rotor, the bearings are lubricated with circulating fluid;
- reliability, wear resistance and durability: a cast-iron body, a polypropylene wheel, metal-graphite bearings and a stainless steel shaft are used;
- wide temperature limit of the working fluid: from ‒10 to +110 ° С;
- quiet operation; surge protection;
- ease of installation and ease of use;
- lightness and compactness: at the Wilo Star-RS 25/4 circulating pump, the weight is 2.4 kg, the installation length is 13 cm.
Minuses:
- relatively expensive: you can buy a Wilo Star-RS 25/4 circulator for 4.4 ÷ 5.8 thousand rubles;
- over time at 3 speeds noise may appear.
Dzhileks "Circuit" - reliable and cheap circulation pumps
The series "Compass" is represented by 6 surface circulation pumps: 25/40, 25/60, 25/80; 32/40, 32/60, 32/80. These are budget units with a “wet” rotor without stuffing box seals.
The most popular model Jeelex Tsirkul 25/40 has a cast-iron case - there are versions with brass and bronze shells.The pump has a flow rate of 3 m3 / h, a head of 4 m, a power consumption of 65 W, and an installation size of 18 cm. The temperature range is from +10 to + 110 ° С.
Pros:
- economic efficiency: it is provided with power control by means of a switch to one of three speeds;
- ease of installation: cap nuts are included;
- low noise level - does not exceed 65 dB;
- reliability and durability: there are no complex systems that are prone to unexpected breakdowns;
- small size and low weight: from 2.9 to 5.6 kg;
- developed service network;
- democratic cost: buy a circulating pump Dzhileks "Circuit" 25/40 available for only 2.4 ÷ 3.2 thousand rubles.
Minuses:
- no cable;
- sometimes in the first days of operation when the unit is heated, there is a smell of paint.
The best innovative circulating pumps for heating, hot water, air conditioning and air cooling
Grundfos ALPHA2 - circulating pumps with intelligence
The Alpha2 line is a new generation of Danish instruments based on the UPS series. Models have an autoADAPT option - they are able to respond flexibly to changing the temperature in the circuit: they automatically regulate the flow to bring the operating point of the pump to the optimum position.
They have functions: summer and night mode, protection against idling and overheating. Equipped with a stable magnet motor and a unique plug. Possessing a starting point of 27 Nm, it is easy to start after a long idle.
Pros:
- high energy efficiency: achieved by automatic performance control, as well as speed and 2 pressure settings, which have 3 fixing options;
- variety of modifications: in addition to the standard ones with a cast iron casing, versions with an air separator (“A”) and a stainless steel (“N”) case for hot water supply are offered;
- reliability: parts are made of wear-resistant stainless materials;
- minimum noise level - up to 43 dB;
- usability: all important parameters are displayed on the front panel;
- small dimensions and weight: at the very main circulation heating pump Grundfos ALPHA2 25-40 length - 18 cm, weight - 2.1 kg;
- durability: the guarantee is issued for 5 years.
Minuses:
- poor adaptation to power surges;
- relatively high cost - the price of Grundfos ALPHA2 is 25-40: 9.0 ÷ 11.1 thousand rubles.
DAB VA - circulation pumps updated
In the linear series VA, models with characteristics similar to the above are quoted. The most popular circulation heating pump is DAB VA 35/180 with a capacity of 3 m3 / h, a head of 4.3 m, a pressure of max 10 bar, and a power of 71 W.
In 2017, the Italian manufacturer of the unit finalized and updated. Since October, the company has produced: a cast-iron case with a cataphoresis coating, an engine with a ceramic shaft in a new design, a label with laser engraving.
Pros:
- energy efficiency: there is the possibility of a 3-speed adjustment;
- simple installation - using a quick-release coupling in a horizontal / vertical position;
- choice of mounting length: 18 or 13 cm;
- maintainability: only 4 screws are removed for dismantling the case;
- the noise level is comparable to the power of sound in a quiet conversation;
- durability: since October 2017, the motor shell is from cast aluminum, the impeller is from technopolymer, the thrust bearing and the shaft are from ceramics, the bushings are from graphite, the sealing rings are from EPDM, other stainless steel parts;
- reasonable prices, for example, the circulation pump DAB VA 35/180 costs 3.3 ÷ 4.4 thousand rubles.
Minuses:
- sometimes there are aggregates with defects;
- there is no information board.
UNIPUMP LPA - energy saving circulation pumps
Unipump LPA circulating pumps, according to the technologies and operating principles used, have much in common with the Grundfos units of the Alpha 2 series. They are suitable for heating systems with night operation, as well as variable performance and temperature.
The devices are designed for circulation in 1- and 2-pipe contours of household CO and SGHS.Equipped with: an engine with long-lasting magnets, a frequency control unit, a control panel.
Pros:
- energy saving: achieved by setting one of five modes;
- thanks to the “wet” version of the rotor, there is no overheating: the bearings are regularly lubricated with circulating water;
- compliance with standard operating parameters: fluid temperature in the circuit - from + 2 to +110 ° C; maximum pressure in the network - 10 bar;
- low noise level - only 43 dB;
- convenience of operation: current indicators are displayed on the monitor;
- high degree of protection: IP42;
- small dimensions (13 and 18 cm for installation), power consumption (22 ÷ 45 W) and weight.
Minuses:
- high price compared with obsolete UPS circulation pump: UNIPUMP LPA 25-60 costs about 5.5 thousand rubles;
- low operational obligations: service life - from 5 years; warranty - 24 months.
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