First of all, in terms of performance, the hydraulic forces are basically the same and all are centrifugal pumps. So poor performance from the distinction. From the structural characteristics, both pumps can be seen from the appearance, is different from the choice of speaking, most people would like to use horizontal single-stage centrifugal pump, mainly because of the horizontal pump is simple, easy maintenance and maintenance . The vertical long axis pump repair trouble, each need to be lifted up when maintenance. And the long axis of the pump for a long time need to replace the fluid bearing, if you do not replace, then the possible consequence is that the shaft centrifugal force is bigger and bigger, resulting in shaft runout value becomes larger, if not replaced, will result in mechanical accidents. And installation to ensure the absolute level of installation. Since there are so many shortcomings, why would you choose vertical long axis pump? First, vertical long-axis pump and more used in the underground tank can not be installed in the inverted condition. Or there is no open space for the horizontal self-priming pump to do the foundation, only with vertical long axis pump on the tank. Second, horizontal self-priming pumps are subject to many limitations, self-priming height can not exceed 5 meters, the medium can not be too thick, the import can not have leaks place. So, do not have the above conditions can only choose to use vertical long axis pump. Third, if a normal horizontal pump (not a self-priming pump) has a very poor self-priming capacity, it is impossible to extract the medium from the tank below. So horizontal and long axis pump is not comparable. It touches horizontal self-priming pump and vertical long axis pump has a ratio. Long axis of the pump requirements for the media: the best is not containing particles or a small amount of tiny particles. Of course, cleaning media is better. Ha ha. Specific circumstances to be specific analysis.
Metallographic Polish
(1) stainless steel polishing machine output good beam quality, including mode and mold stability; (2) stainless steel polishing machine output power is large enough (this is the key to speed and effectiveness), whether the energy is stable (usually requires stability of 2%, in some occasions is required 1%, so as to process the ideal effect); (3) stainless steel polishing machine should have high reliability, should be able to work continuously in harsh industrial processing environment; (4) stainless steel polishing machine itself should have good maintenance, fault diagnosis and chain function, downtime should be short; (5) the operation is simple and convenient, the control key function is clear, can refuse illegal operation, protect the stainless steel polishing machine from damage. Stainless steel polishing machine should follow the principle of purchase: stainless steel polishing machine technology has many valuable characteristics. However, specific to a product is suitable for the use of this technology, should follow the following principles :(1) with other existing methods can not be solved, only with polishing processing method to solve; (2) the existing other processing methods can be solved, but if the polishing processing method can greatly improve product quality, improve production efficiency and significantly increase economic and social benefits; (3) to fully consider the processing process with polishing processing related to those matching links; (4) to pay attention to the application of polishing processing and conventional processing composite processing technology, in order to make full use of their strengths
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