Brass knurled thread insert Made of material, good thermal conductivity and heat resistance.
Widely Used On the Injection molding for Tightly Fixing.
Can be installed by ultrasonic or heat into thread tapered hole, or molded in during injection.
China leading manufacturers and suppliers of Hex Nut,Hexagonal Nut, and we are specialize in Stainless Steel Nuts,Hex Nut Bolt, etc.
Brass hex nut,hex coupling nut,hex flange nut,hex thin nut,hex bolts and nut Shenzhen Lanejoy Technology Co.,LTD , https://www.szsmallcompressionspring.com
Select the pump to note
In recent years, the social ownership of agricultural pumps in our country has increased greatly, especially small agricultural pumps represented by submersible pumps and self-priming pumps are favored by the majority of users because of their low prices and easy operation. However, due to the large number of manufacturers of small pumps, technical strength varies greatly, resulting in poor product quality advantages and disadvantages. Coupled with the operation, improper use and other factors, so many users have a new set of troubles, or even a lot of economic losses. According to statistics, at present, half of the annual production of agricultural pumps in China is used to replace scrapped products. Therefore, how to choose a long-lasting, pleasing pump and how to extend the life of the pump has become a great concern to the majority of users. First, choose a standard pump 1, what is the standard pump Standard pump is the country according to the requirements of ISO, development, implementation of the latest models of pumps. Its main features are small size, light weight, excellent performance, easy operation, long life, low energy consumption. It represents the latest trend of the current pump industry. 2, how to choose the pump When the user selects the 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 pumps, and to 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 be at a loss what to do. 3, what brand of pump as a good user, due to the limitations of professional knowledge, it is difficult to decide, the best way is to consult the pump experts. If you really no one consulting, may wish to consult some of the older pump users, especially those who are close to their own conditions, to buy these users reliable, reliable and more mature products, after all, a wise choice. At the same time, should be based on local power supply situation to decide with single-phase pump or three-phase pump. Second, select the appropriate flow pump pump flow, that is, the amount of water generally should not be chosen too large, otherwise, will increase the cost of purchasing a pump. Specific issues should be specific analysis, such as users own draft self-priming pump, the flow should be selected smaller; such as user irrigation submersible pump, you can choose the appropriate flow larger. Third, choose to meet the head lift pump 1, head lift choice The so-called head lift is the required lift, rather than lift height, it is clear that the selection of pumps is particularly important. Pump lift about 1.15 to 1.20 times the height of the lift. If a water source to the water vertical height of 20 meters, its required lift is about 23 to 24 meters. Select the pump should make the best lift on the pump nameplate and the required head close, in this case, the highest efficiency of the pump, the use of more economical. However, it is not absolutely necessary that the pump should be absolutely energy-efficient. As long as the average deviation does not exceed 20%, the pump can work under more energy-efficient conditions. 2, how much the nameplate head is better Select a pump on the nameplate lift is much smaller than the desired lift, often can not meet the user's wishes, even if it can pump water, the water will be pitiful, or even become useless Freeland of leisure pump. Whether to buy the pump lift the higher the better? actually not. High-lift pump for low lift, 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. Fourth, the use of several issues should pay attention to correctly grasp the use of the pump is to extend the life and reduce economic losses an important factor. Before starting to do some necessary checks: the rotation of the pump shaft is normal, with or without stuck phenomenon; the location of the impeller is normal; cable and cable plug without rupture, abrasions and broken phenomenon. Operation should pay attention to observe the voltage changes, the general control of the rated voltage within ± 5%. In addition, the location of the pump in the water is very important, should be selected as much as possible in the water, silt-free, good water quality, vertical suspension in the water, not allowed to cross, so as not to fall into the mud or suspended matter blocked by the pump inlet, and Lead to sharp drop in water or even pumping to the water.