DG-type boiler feed pump buy tips In recent years, the social possession of agricultural DG-type boiler feed water pump in our country has greatly increased, especially for small agricultural DG-type boiler feed pump represented by sub-multistage centrifugal pump, which is favored by the majority of users because of its low price and easy operation. . However, due to the small number of DG-type boiler feed pump manufacturers numerous technical strength varies greatly, the quality of the product poor quality, many users have encountered the purchase problem. Therefore, consumers in the purchase of multi-stage centrifugal pump products, it is necessary to have some buy and use common sense: 1. Select the standard DG boiler feed pump The so-called standard DG-type boiler feed pump is the state according to the requirements of ISO, developed and implemented the latest model of DG-type boiler feed pump. Its main features are small size, light weight, excellent performance, easy operation, long life, low energy consumption. It represents the current trend of the current DG-type boiler feed pump industry. Users choose multi-stage centrifugal pump, it is best to agricultural machinery department approved point of sale, we must recognize the manufacturer. It is recommended to give priority to the purchase of water-filled submersible pump, and see the grades and product quality certification. Do not buy "three no" (that is, no manufacturer, no production date, no production license) products, otherwise there is a problem, the user will do nothing. As the user, due to the limitations of professional knowledge, it is difficult to decide, the best way is to consult DG boiler feed pump experts, may wish to consult some of the older DG boiler feed pump users, especially those with their own conditions of use Close to buy these users trustworthy, reliable and more mature products, after all, a wise choice. At the same time, should be based on the local power supply situation to decide with single-phase pump or three-phase pump. 2. Choose to meet the lift requirements of the DG-type boiler feed pump The so-called lift is the required lift, rather than lift the height, it is clear on the choice of DG-type boiler feed pump is particularly important. DG-type boiler feed pump lift about the height of 1.15 to 1.20 times. If a water source to the water vertical height of 20 meters, its required lift is about 23 to 24 meters. DG type boiler feed pump should be selected to make DG type boiler feed pump lift the best head and the desired close, the general deviation of not more than 20%, in this case, DG-type boiler feed pump the highest efficiency, but also more energy-efficient , It will be more economical to use. If the nameplate lift is far less than the required head, DG-type boiler feed pumps often can not meet the needs of users, even if the pumping water, the water is also small pitiful. But in turn, high-lift DG-type boiler feed pump for low head, there will be excessive flow, resulting in motor overload, if the long run, the motor temperature, the winding insulation will gradually aging, or even burn the motor . 3. Select the appropriate flow of type DG boiler feed pump DG-type boiler feed pump flow, that is, the amount of water generally should not be selected too large, otherwise it will increase the cost of purchasing DG-type boiler feed pump. 4. DG-type boiler feed pump key to the purchase Proper selection of DG-type boiler feed pump. After determining the type of multi-stage centrifugal pump, to consider its economic performance, with particular attention to multistage centrifugal pump head and flow and the choice of supporting power. It must be noted that the head (total lift) indicated on the multi-stage centrifugal pump plate is different from the head (actual head) when it is used, as there is a certain loss of resistance when water flows through the pipe and the pipe . Therefore, the actual head is generally 10% -20% lower than the total head, the amount of water is also reduced accordingly. Therefore, the actual use, only signs by the head and flow rate of 80% to 90% estimate, DG-type boiler feed pump supporting power options, according to the signs indicated on the power selection, in order to DG-type boiler feed pump Start quickly and use safety, the power of the power machine can also be slightly larger than the DG-type boiler feed pump power, generally higher than about 10% is appropriate; if there is power, choose DG-type boiler feed pump, you can press the power machine Power and its accompanying purchase of DG-type boiler feed pump. To strictly purchase DG-type boiler feed pump. When the purchase to test the "three cards", that is, agricultural machinery to promote permits, production licenses and product inspection certificate, only three cards all can avoid the purchase of obsolete products and inferior products. 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DG-type boiler feed pump buy tips
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