The applicable medium of stainless steel valves, the classification and use of common stainless stee

Stainless steel valves are usually used in situations where the working medium is corrosive. The ability of any kind of valve material to resist the corrosion of the working medium is relatively limited and is affected by many factors. If the processing and heat treatment processes used in the manufacturing process are appropriate, the corrosion resistance of this material can be guaranteed.

As for the concentration of 98% concentrated nitric acid medium, no matter what kind of heat treatment process is used, this steel does not have corrosion resistance. Therefore, when selecting valve materials according to the properties of the working medium, it is necessary to study the influence of various factors such as the concentration, temperature and heat treatment process of the medium on the corrosion resistance at the same time. Stainless steel valves have become a must-purchase valve products in various industries, but there are very few domestic valve manufacturers that can meet international standards, so customers must ask businesses to provide various stainless steel valves before purchasing stainless steel valves and factory certificates, so as to reduce the purchase of unqualified products.

Nowadays, stainless steel valves and sanitary valves that meet international standards are mainly from Japan, Germany, the United States, the United Kingdom and Shanghai, a first-tier city in China. Stainless steel valve valve is the control component of the pipeline fluid transportation system, it is used to change the channel section and the direction of medium flow, with the functions of diversion, cut-off, adjustment, throttling, check, diversion or overflow pressure relief. Valves for fluid control range from the simplest shut-off valves to a wide variety of valves used in the most complex automation systems.

The valve can be used to control water, steam, oil, gas, slurry, and various corrosive media. The control of the valve can adopt a variety of transmission modes, such as manual, electric, hydraulic, pneumatic, worm gear, electromagnetic actuation, electromagnetic hydraulic, electro-hydraulic, gas-hydraulic, spur gear, bevel gear drive, etc.; Under the action of pressure, temperature or other forms of sensing signals, it can act according to predetermined requirements, or simply open or close without relying on sensing signals, and the valve relies on a drive or automatic mechanism to make the opening and closing parts lift, slide, swing or slew movement, so as to change the size of its flow channel area to achieve its control function.

Here are some 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, Chaoda, 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.

Today I want to explain to you the relevant knowledge of stainless steel valves. Stainless steel valves because of its green environmental protection and other advantages, into the industrial application, has become a must purchase valve products in the field of pipelines in various industries, so consumers in the purchase, must ask the business to provide a variety of stainless steel valve production and factory certificate, can also be tested with a spectrometer, spectrometer because of high precision, wide range of use and widely used, some L valves are mainly dependent on the equipment detection, so that you can reduce the purchase of unqualified products.

Stainless steel valve type.

The common ones are: stainless steel gate valves, stainless steel filters, etc., and a variety of materials are available for selection.

Stainless steel valve classification.

First, the main features of the folding stainless steel plug valve.

1. It can be made into double lifting point opening and closing.

2. Strong adaptability;

3. Good sealing and water-stopping performance;

4. Good anti-corrosion performance;

Second, the main features of folding stainless steel ball valves.

1. Low fluid resistance;

2. Small size and light weight;

3. Tight, reliable and good sealing;

4. Easy to operate, quick to open and close;

5. Easy maintenance and simple structure;

6. In the fully open or fully closed state, it is not easy to erode;

7. Wide range of application.

Stainless steel valve use.

It is widely used in petroleum, liquefied gas, pharmaceutical, electronic industry and other fields. The working pressure can be adjusted from -269 to 1430 high temperatures.

How to check for intergranular corrosion in stainless steel valves.

1) Sulfuric acid boiling test method (L method);

2) Sulfuric acid boiling orange test method (T method);

3) Nitric acid boiling test method (X method);

4) oxalic acid electrolytic etching test method (C method);

5) Nitric acid constant temperature test method (F method).

Stainless steel valve mounting.

1. In order to avoid damage to these parts, they should be tied to the flange.

2. Before installation, check the valves one by one in detail, such as: specifications and models.

3. When installing the flange pneumatic valve, pay attention to tighten the bolts evenly, and not too loose or too tight.

4. Wrap the sealing packing on the thread of the pipe so as not to affect the flow of the medium.

5. The pipeline must be cleaned to avoid failure.

Now in life, no matter what kind of products people choose, they prefer to use stainless steel, so that it has a strong antioxidant effect, stainless steel valve material many people are more curious, understand before they can make a good choice, in addition to what classification of stainless steel valves is also to people need to understand, when choosing to help. Now in life, no matter what kind of products people choose, they prefer to use stainless steel, so that it has a strong antioxidant effect, stainless steel valve material many people are more curious, understand before they can make a good choice, in addition to what classification of stainless steel valves is also to people need to understand, when choosing to help.

Stainless steel valve material?

The quality of stainless steel valve materials is enhanced sequentially. Stainless steel valve industry: food biscuit industry, instant noodles and rice noodles industry, various quick-frozen food dehydration line equipment, glass products industry.

It can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, slurries, oils, liquid metals and radioactive media.

One is the ferritic stainless steel valve: containing chromium 12 30. Its corrosion resistance, toughness and weldability improve with the increase of chromium content, and the chloride stress corrosion resistance is better than that of other types of stainless steel valves.

The second is: austenitic stainless steel valve: chromium content is greater than 18, but also contains about 8 nickel and a small amount of molybdenum, titanium, nitrogen and other elements. It has good comprehensive performance and can resist corrosion of a variety of media.

The third is austenitic ferritic duplex stainless steel valve: it has the advantages of austenitic and ferritic stainless steel ball valves, and has superplasticity. Fourth, martensitic stainless steel valves: high strength, but poor plasticity and weldability.

What are the classifications of stainless steel valves?

One is the Ostian stainless steel valve: 304 stainless steel valve is this type, 304 standard composition is 18 chromium plus 8 nickel, that is, the commonly known 18 8 stainless steel valve. This type of stainless steel valve contains the alloying element nickel, which has good corrosion resistance.

The second is the Matian bulk stainless steel valve: the representative steel valve of this type of stainless steel valve is 410, and its chemical composition contains 13 chromium, 0 15 carbon below and a small amount of other element alloys. However, it does not contain nickel and has poor corrosion resistance.

The third is the fertilizer system stainless steel valve: the representative steel valve of this kind of stainless steel valve is 430, and its standard chemical composition is 16 18 chromium, with low carbon content, nickel-free and cheaper.

Fourth, precipitation hardening stainless steel valves: in addition to chromium and nickel, this kind of stainless steel valves also contain precipitation hardening elements such as copper, aluminum and titanium, which harden the material and increase its strength.

Fifth, duplex stainless steel valves: the typical steel grade of this type of stainless steel valve is 2205, that is, containing 22 chromium and 5 nickel.

After taking a look at the stainless steel valve material introduced to you above, we found that there are many kinds of materials, no matter how to choose, it can meet people's different needs, what are the classifications of stainless steel valves, different classifications, the effect is not the same, there are different types, people must look carefully when they choose.

Stainless steel valves, in layman's terms, are valves made of stainless steel, from the stainless steel material grade of the valve body, mainly L, 316L, etc., according to international standards can be divided into CF8, CF3, CF8M, CF3M, the quality of the material CF8 CF3 CF8M CF3M. Because stainless steel is highly corrosion-resistant, easy to form, highly compatible, and can maintain strength over a wide temperature range, many advantages make stainless steel valves widely used in heavy industry, light industry, daily necessities industry and building decoration industry.

Stainless steel refers to the steel that is resistant to weak corrosive media such as air, steam, water and chemical corrosive media such as acid, alkali and salt, also known as stainless acid-resistant steel, stainless steel valve is stainless acid-resistant steel valve, which is not easy to rust and resistant to acid and alkali corrosion. The research test shows that the corrosion resistance of steel in weak media such as atmosphere and water and oxidizing media such as nitric acid will increase with the increase of chromium water content in steel, and when the chromium content reaches a certain percentage, the corrosion resistance of steel will change abruptly, that is, from easy rust to not easy to rust, from non-corrosion resistance to corrosion resistance.

Introduction: The so-called stainless steel valve is a strengthened version of the valve, and the valve is a device to control the loss switch, and the stainless steel valve is to make the valve have better waterproof and anti-corrosion, so that it can be used for a longer time. Today, I will take you to understand the stainless steel valve.

How to install stainless steel valves:

1.When the valve is hoisted, do not tie the rope to the stem to prevent damage to the parts.

2.Before installing the valve, check whether the valve specifications are symmetrical and whether there is any damage. Because it is easy to knock it off when transporting, it is necessary to turn the valve to see if it is tilted and remove the debris inside when you get the valve.

3.If the valve is flanged and pneumatic, pay attention to tighten the bolts, and the flange of the valve should be flat with the pipe to avoid excessive pressure cracking.

4.When installing a screw type valve, the filler should be wrapped around the thread of the pipe, but be careful not to get into the valve, if it gets into the valve, it will affect the flow inside.

5.When installing the valve, it should be noted that the pipe connected to the valve should be cleaned, if there is debris, it will damage the sealing surface of the valve, and if the debris area is large, it will block the valve and cause it to not be used.

What to pay attention to when installing stainless steel valves:

1.When the stainless steel valve is reversed, it should be careful not to install it in reverse, if it is reversed, it will affect its use effect and damage the life of the valve.

2.When installing stainless steel valves, it is necessary to choose a convenient place to operate, so that it is more convenient to use in the future.

3.The place where the stainless steel valve is installed is best installed at a place of meters from the ground, if it is a landing valve, do not put the handwheel facing up, so as not to operate smoothly.

4.When installing stainless steel valves, do not install the handwheel underneath, as it will easily corrode the handwheel if it takes a long time.

How to maintain stainless steel valves:

1.Stainless steel valves should be placed in a dry and ventilated room.

2.Stainless steel valves should be inspected and removed from time to time, and then anti-rust oil should be applied to the surface.

3.Remember to check and repair the installed stainless steel valve regularly to ensure that it can work normally.

4.When inspecting, the first thing to see is whether the sealing surface of the valve is worn out, and then repair or replace the valve.

5.If the environment in which the stainless steel valve is installed is harsh, a protective cover should be installed on the valve.

6.If the valve is operating, do not knock it or place heavy objects.

Well, the above is the relevant content about stainless steel valves introduced to you, do you have a deeper understanding of stainless steel valves after you read it? Thank you for your continued support of the local Ba Tu**. , you can get it for free