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The difference between stainless steel centrifugal pump and cast iron pump

The difference between stainless steel centrifugal pump and cast iron pump

Stainless steel centrifugal pumps are used in all aspects of life due to the particularity of their materials. The main reason is the stability of stainless steel materials. It can transport from tap water to various industrial water for long distances and long periods. It has a wide range of performance and adaptability. At the same time, after special engineering treatment, the stainless steel pressing technology adopted has improved the adaptability of stainless steel to a new height, that is, it is suitable for different temperatures, pressures and flow rates, and its corrosion resistance is even more important in transportation materials. Preferred. Iron and stainless steel are both raw materials for pumps. Relatively speaking, stainless steel centrifugal pumps have obvious advantages. In the future, stainless steel centrifugal pumps will replace cast iron pumps with high probability.

Cast iron is magnetic, but stainless steel is not. The sound of cast iron knocking up is dull, and stainless steel is brittle. Cast iron is used more in general water supply and drainage, while stainless steel is used more in the chemical industry (corrosive medium).

1. Stainless steel centrifugal water pumps are not easy to be corroded even if they are not suitable for a long time, and keep their original state without rusting, but other cast iron pumps are easily affected by the environment.
2. Stainless steel pumps can pump acid and alkali corrosive liquids in use, but other cast iron pumps cannot be exposed to corrosive acid and alkali liquids due to their own material characteristics.
3. In the manufacture of stainless steel centrifugal pumps, advanced technology is used, which is more precise, with high surface density, relatively smooth, reduced resistance, and higher efficiency than traditional pumps, while cast iron pumps use sand molds. The method of casting, so more capacity is consumed in transportation.
4. Stainless steel materials have been used in various types of pumps, such as stainless steel centrifugal pumps, stainless steel submersible pumps, stainless steel gear pumps, stainless steel self-priming pumps, stainless steel plunger pumps, etc. The stainless steel material improves the application range of stainless steel pumps.

Although the material of the stainless steel pump has been changed, its operating principle is the same as that of the traditional cast iron pump, but its excellent characteristics have met the needs of modern industry.

Why would a stainless steel centrifugal pump replace a cast iron pump?

Stainless steel centrifugal pump has obvious energy saving effect. Pumps are a big energy consumer. According to estimates, 20% of the country’s power generation is consumed by pumps. Therefore, the improvement of pump efficiency will be more significant for energy saving. Stainless steel centrifugal pumps have higher hydraulic efficiency, which can save electricity by 10%-20% compared to similar cast iron pumps.

stainless steel centrifugal pump can avoid the "second pollution" of water quality.

Iron and stainless steel are both raw materials for pumps. Relatively speaking, stainless steel centrifugal pumps have obvious advantages. In the future, it is a general trend for stainless steel centrifugal pumps to replace cast iron pumps.

However, the purchase cost of stainless steel pumps is 20% to 30% more expensive than cast iron pumps. At present, it is relatively less used in third- and fourth-tier cities in eastern my country and the central and western regions, and there is a large space for substitution. This time, the Ministry of Finance will include centrifugal pumps and other energy-saving pumps into the scope of subsidies, or it will speed up the process of replacing cast iron pumps with stainless steel.