Detailed explanation of the material properties of the valve body four commonly used types .

Whether in industry or in daily life, we will use something called valve body. In our daily lives, in order for us to have proper access to water, we basically use the water pipes.

to install one such valve body. It is more widely used in industry, in addition to controlling the flow of water, we can also control the flow of air pressure or other liquids by using the valve body, etc. However, the materials used in different valve bodies are different, so what are the properties of commonly used materials, let's find out together.

Gray cast iron

Gray cast iron valves are used in various fields of industry because of their low cost and wide range of application. They are typically used with water, steam, oil and gas as media, and are widely used in chemicals, printing and dyeing, oiling, textiles and many other industrial products that have little or no impact on iron pollution.

It is suitable for low pressure valves with an operating temperature between 15 200 and a nominal pressure of pn.

Black-hearted malleable cast iron

It is suitable for medium and low pressure valves with an operating temperature between 15 300 °C and a nominal pressure of PN. The applicable medium is water, seawater, gas, ammonia, etc.

Ductile iron

Ductile iron is a type of cast iron in which this cast iron, clump or spheroidal graphite, replaces the flake graphite in gray cast iron. This change in the internal structure of the metal makes it mechanically better than ordinary gray cast iron, and does not damage other properties. As a result, valves made of ductile iron use higher pressures than those made of gray cast iron.

It is suitable for medium and low pressure valves with an operating temperature between 30 and 350 and a nominal pressure of pn.

The applicable medium is water, seawater, steam, air, gas, oil, etc.

Carbon steel (WCA, WCB, WCC).

Originally cast steel was developed to accommodate production needs that exceeded the capacity of cast iron and bronze valves. However, due to the good overall performance of carbon steel valves and the high resistance to stress caused by thermal expansion, impact load and pipeline deformation, its use range is expanded, usually including cast iron valves and bronze valves.

Suitable for medium and high pressure valves with an operating temperature between 29 425. Among them, 16Mn and 30Mn are used for temperatures between 40 400, which are often used to replace ASTM A105. The applicable medium is saturated steam and superheated steam.

High and low temperature oils, liquefied gases, compressed air, water, natural gas, etc.

In fact, these materials are very common in our lives, and may not only be used in the manufacture of valve bodies, but also in many industrial equipment. These materials are generally synthetic materials, and the use of these materials to manufacture the valve body can improve the pressure resistance value of the valve body, which can ensure to a certain extent that the valve body will not be damaged due to excessive fluid in the process of use. Therefore, when we are choosing a valve body, it is best to understand what the raw materials of the valve body are, and consider whether to meet our own needs.

Commonly used materials of the valve body and various materials heat treatment analysis, the material of the valve body is varied, suitable for a variety of different working conditions.

1. Gray cast iron, suitable for low-pressure valves with working temperature between -15 +200 and nominal pressure pn.

2. Black-hearted malleable cast iron, suitable for medium and low pressure valves with working temperature between -15 +250 and nominal pressure PN.

3. Ductile iron, suitable for medium and low pressure valves with working temperature between -30 +350 and nominal pressure PN.

4. Carbon steel (WCA, WCB, WCC), suitable for medium and high pressure valves with working temperature between -29 +425, of which 16mn and 30mn working temperature are between -40 +450, which is often used to replace ASTMA105.

5. Low temperature carbon steel (LCB), suitable for low temperature valve valves with working temperature between -46 +345.

6. Alloy steel (WC6, WC9), suitable for high-temperature and high-pressure valves for non-corrosive media with a working temperature between -29 +595; WC5 and WC12 are suitable for high temperature and high pressure valves for corrosive media with a working temperature between -29 +650.

7. Austenitic stainless steel, suitable for valves with corrosive media with working temperature between -196 +600.

8. Monel alloy is mainly suitable for valves containing hydrogen fluorine medium.

9. Cast copper alloy, mainly suitable for valves for oxygen pipelines with a working temperature between -273 +200.

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 are the top ten domestic first-line valve brand manufacturers in 2022-2023, but for reference only: Suzhou Neway Valve Co., Ltd., Shanghai Guanlong Valve Machinery, Shanghai Qizhong Valve Manufacturing, 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.

This article details the material properties of the valve body; If you think it will help you, please raise your hand and give the American Vodon valve a thumbs up.

Now there are many ways to classify valves, there are according to the medium, caliber, pressure, structure, etc., if you classify according to the material of the valve body, refer to the classification of Weidun VTON;

According to the different materials of the valve body, the valve can be divided into:

1) Metal material valve: The valve body and other parts are made of metal materials. Such as cast iron valves, ductile iron valves, carbon steel valves, stainless steel valves, alloy steel valves, copper alloy valves, aluminum slag gold valves, lead alloy valves, titanium alloy valves, Monel alloy valves, etc.

For example, Vton cast iron butterfly valve, ductile iron butterfly valve, carbon steel ball valve, stainless steel ball valve, Monel alloy globe valve, etc.

2) Non-metallic material valve: Its valve body and other parts are made of non-metallic materials. Such as plastic valves, ceramic valves, boring valves, FRP valves, etc. This type of valve is relatively rarely used.

3) Metal body lining valve: The shape of the valve body is metal, and the main surfaces inside that are in contact with the medium are lining, such as rubber lining valves, plastic lining valves, ceramic lining valves, etc. For example, Vton and Gaimi carbon steel fluorine-lined diaphragm valves, carbon steel fluorine-lined butterfly valves, stainless steel fluorine-lined ball valves, carbon steel fluorine-lined ball valves, etc.

The main body materials are: C carbon steel, I1Cr5Mo chromium-molybdenum steel, HCR13 series stainless steel, K malleable cast iron, L aluminum alloy, P0Cr18Ni9 series stainless steel, PL00Cr19Ni10 series stainless steel, Q ductile iron, R0Cr12Ni12Mo2 series stainless steel, RL00Cr17Ni14Mo2 series stainless steel, S plastic, T copper and copper alloy, Ti titanium and titanium alloy, V Chromium-molybdenum vanadium steel, Z gray cast iron.

4) Special materials.