How to choose the circulation pump for heating
Circulation pump for heating systems is necessary in cases when the gas pressure in the supply system decreases. Such a pump reduces the heating time of the heating devices by increasing the pressure and performance of the boiler.
How to choose a circulation pump for heating
In the winter, rarely any gas boiler able to operate on regular power. Often to blame is the low gas pressure can drop to critical 5 atmospheres. If at this pressure the gas boiler, the domestic drafting and begin to work (the import version is just not included!), he will be able to produce very little heat. All the resulting heat will spend money on your own heating, while the interior houses remain without heating. The situation can drastically improve if you buy additional circulation pumps, wrazenie in boilers or heating pipes.
Types of circulating pumps
Structurally, they are divided into two sub-categories – single phase and three phase. The first is designed for household appliances. They connect to the network 220 In, selected the correct rate of flow and the pump begins to operate normally, that is to pump warm coolant all the way round the house!
You can buy a single-stage or multi-stage circulation pumps. The first characteristic of work at a fixed speed, while the second you can change the rate of flow of the coolant in manual mode.
Industrial versions of the pumps are often produced with additional hydraulic clutch. Coupled with squirrel cage motors with low starting torque, they have soft start and stop, high wear resistance and extremely low consumption of electrical energy.
On the last figure you need to focus, as some prospective buyers fear high electricity bills in the short term. But in practice all on the contrary – the home version of pump often have power consumption in the order of 10-70 W, while industrial – 3-5 kW. But this is a substantial rate of flow of the coolant, allowing the boiler to run with minimal load. Due to the substantial fuel savings any circulation pump pays for itself in a short time!
Structurally, the circulation pumps there are «wet» and «dry». First of all moving parts, except the motor, which is in contact with the coolant. This somewhat reduces the efficiency (less than 50 percent), but allows the pump, with ceramic bearings, has to be increased wear resistance, while the «dry» pumps, which have an efficiency over 80 percent, will benefit low energy consumption. But their cost is relatively «wet» versions of high and so they occupy a smaller niche sales in the segment of heating equipment.