Types of circulating pumps
The most common classification of circulating pumps is the separation into two types: with "dry" and "wet" rotors.
The main characteristic of a pump with a "dry" rotor is that the pump motor avoids contact with the heat source. This type is usually installed in multi-storey institutions, where large volumes of water are circulated.
The impeller of the circulating "wet" pump, in contrast to the "dry" pump, is in the pumped liquid. In such a system, the fluid lubricates the parts and cools the motor. At the same time, the efficiency of this type is almost half that of the "dry" efficiency.
The most popular models of pumps Grundfos
Grundfos - is one of the most popular companies of the manufacturer of circulating pumps in the modern market. This brand is distinguished from others by a huge assortment of varieties and models for different types of premises. All models have a detailed description of technical characteristics and photos in branded electronic 3-D Internet directories. Also, the Grudnfos pumps are distinguished by the economy in the consumption of electricity.
Grundfos has a special series of circulating pumps, which are small in size and light in weight, which greatly simplifies their installation and makes their repair unpretentious. Such a pump does not require special assembly and is almost immediately ready for operation and connection to the mains. But still, we should not forget that the installation of the circulating pumping system requires special preliminary calculations, taking into account such factors as pipeline diameter, coolant temperature, etc. Therefore, it is best to seek the help of a master to avoid financial losses.
So, the most popular model of firm grundfos is ALPHA + pump with a "wet" rotor. This universal and compact device does not require additional settings and special maintenance. This model experts advise to install for floor heating, tk.it is made of stainless steel, and the pumped liquid contains a considerable amount of air, which, when cast iron, causes sudden corrosion. One of the main technical features of this model is silent operation.
Not much less popular are the UPS models.
Pumps of this series are most applicable when planning two- or single-pipe heating systems. UPS models can be used with a timer relay connection for software shutdown and power-on in order to save power, usually limiting the use time to periods when hot water is needed.
Another one of the popular series grundfos are UPA pumps. UPA models are installed in residential areas to increase the pressure in the water supply system from an external source. The UPA-pump has a built-in flow switch that disconnects and turns it on when the crane is opened and closed. Used in open systems, and can also be connected to the main water supply network.
Grunfos is an unbeatable sign of efficiency, reliability and versatility. All products of this manufacturer are made of high-quality materials, which ensures trouble-free operation for long years at a reasonable price!
