Are brass valves of the same brand more expensive than ductile iron valves

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

It must be expensive, and brass is generally used for small calibers.

The small-caliber ones are about the same, and the brass ones with large-diameter flanges are more expensive.

There must be a big gap, and there are 304,316 stainless steel in general. The castings of 304 are 12,000 according to scrap, and 18,000 for 316, which is expensive if they are calculated according to the finished product. Isn't it cheaper to cast iron?

It depends on what type of valve, stainless steel.

There are also many kinds. Take the same size of the valve, cast iron and stainless steel 304

It is normal for the material to differ by a factor of 3. Your problem is so broad that it can only serve as a reference for you.

As mentioned above, this depends on what valve, but generally speaking, stainless steel is much higher

There are many types of safety valves. The thread type is made of copper. Cast iron is rarely used and is not easy to weld. Nowadays, the conventional safety valves are made of carbon steel WCB. ——Shuangtai valve.

Cast steel is expensive. They are not only because of the influence of material and processing technology. The most important thing is that their parameters are not on a scale.

The pressure rating of cast iron valves is below (not included), while the pressure rating of cast steel valves is above, so when choosing, there is no comparison.

The main difference between cast iron and iron steel valves is the different carbon content, which directly affects the strength and plasticity of the steel. Cast steel gate valves are higher than cast iron gate valves. There are two main reasons for this. First, the material is expensive, and second, the processing technology of cast steel gate valve is more complex than that of cast iron, and the cost is higher.

The same model specification must be expensive for cast steel! Because the material is expensive, there are several more processes in smelting! The difficult steel to process during forming is larger than that of iron, so it will be more expensive.

The model specifications are the same, and the cast steel is expensive. Because the material is expensive and difficult to process, the pressure is higher than that of cast iron.

The casting process of cast iron gate valve and cast steel gate valve is different, and cast steel is relatively more expensive than cast iron. Therefore, many times the pipeline needs to use large-diameter gate valves, considering the best reasons, cast iron gate valves will be chosen.

Cast iron and cast steel have the following differences:

1.The brightness is different, the cast steel material is shiny, the cast iron is dark and gray, the gray iron and ductile iron in the cast iron are different, and the ductile iron is brighter than the gray iron.

2.The appearance of the particles is different. Cast steel castings have a high density, and the particles are generally not visible to the naked eye. Particles can be seen in both gray and ductile iron. Gray iron particles are larger.

3.The percussion sound is different. The sound of the collision of cast steel is "rigid", and the sound of cast iron will be a little muffled.

4.Gas cutting. The steel castings have rough surfaces, risers, and large gate areas, which must be removed by gas cutting. Cast iron is constantly cut with gas.

5.Toughness is different. The toughness of steel castings is close to that of steel plates, and the toughness of cast iron is poorer.

6.Although the two are both iron-carbon alloys, the percentages of carbon, silicon, phosphorus, sulfur and other chemical elements contained in the hesitation are different, and they have different metallographic structures after crystallization, showing different mechanical properties and process properties.

There is no good or bad, this depends on the working conditions of your valve, the toughness of cast steel is good, and it is not wear-resistant. Ductile iron has poor toughness, is relatively brittle, and is also corrosion-resistant and wear-resistant. There are also cast steel valves that can do high pressure, and ductile iron valves that can only do low pressure.

It depends on the environment you use, where you use it, and what media you use. Generally speaking, cast steel will be better. Cast steel has less carbon content, good toughness, and higher pressure and temperature resistance than cast iron.

Cast iron valves are not suitable for diesel, seawater and acidic media. Cast iron valves are less expensive.

There's nothing good or bad about that, it mainly depends on your medium and pressure. Cast steel valves have a wide range and a little cost may be high.

Ductile iron valves are mainly used for low pressure applications.