Types Of Butterfly Valves

 

 

As the most common architectural valve, the butterfly valve was invented by the Americans in the 1930s and promoted in the country in the 1970s. At present, there are many classifications and wide applications. The picture above is the most basic butterfly valve, the structure mainly includes, drive, valve body, seal, valve plate, and connection.

 

Classified by valve body material

There are about two types, cast iron and cast steel. If cast iron does not specifically refer to ductile iron, gray cast iron is used. The same is true for cast steel. Carbon steel is usually used if stainless steel is not specifically mentioned.

 

Connection type classification

There are common clamps, lugs, and flanges. Among them, the clamp method is widely used in the field of construction and buildings, and the cost performance is higher. Wafer butterfly valves are connected between two pipe flanges with stud bolts. Flanged butterfly valve has a flange on the valve, and bolts are used to connect the flanges at both ends of the valve to the pipe flange. The lug type butterfly valve has two types of connection holes, one is a through hole. This type of connection requires stud bolts like the wafer connection. The other is a threaded hole, which functions as two nuts during the connection process, and is fixed in the middle of the pipe flange with two bolts.

 

Hydraulic System Valves

 

Classified by drive form

Commonly used in buildings are manual (handle, turbine) and electric, while pneumatics are rarely used. The movement of the valve plate is affected by the center line and eccentric (single eccentric, double eccentric, triple eccentric) structure.

 

Classified by seal

There are two types of soft seal and hard seal. The soft seal is more commonly used in buildings, and the material is mostly EPDM or NBR.

Distinguishing the types of butterfly valves helps you choose the most suitable butterfly valve. We are a manufacturer of butterfly valves, providing you with all kinds of high-quality butterfly valves. Please feel free to contact us if you need them.

How To Maintain High Speed Rotary Union To Extend Service Life？

 

High Speed Rotary Union

 

High-speed rotary union is a type of rotary joint. High-speed rotary joints are used for high-speed interface transmission media. High-speed rotary joints are different from ordinary rotary joints, so you must pay special attention to them during normal use. Now let's take a look at the daily maintenance of high-speed rotary joints.

 

Maintenance Methods

1. Sealing surface

Check the wear condition and thickness change of the sealing surface (generally, the normal wear is 5-10mm); observe the friction track of the sealing surface to see if there are three-point discontinuity or scratches. If these problems occur, don't hesitate to replace the rotary joint immediately.

 

2. Clean regularly

Special attention should be paid to the inside of the rotary joint drum and pipeline, and a filter should be added when necessary. This is because many foreign objects will cause strong wear on the rotary joint, and frequent cleaning can effectively extend the service life of the rotary joint.

 

3. Long-term non-use

If the general machine is not used for a long time, it will cause scaling and rust inside the rotary joint. If it is used suddenly, it will get stuck or drip.

 

4. Regular oil injection

The oil injection device should be oiled regularly to ensure the reliability of the rotary joint bearing operation. Rotary joints that circulate heating medium should gradually generate temperature to avoid sudden temperature changes.

 

Tip: Generally, after the high speed rotary union is used, a lot of small deposits will appear. In this case, if the machine stops running, the rotary joint must be folded down for cleaning, and stored properly, and then installed when the machine needs to run. This method can significantly increase the service life of the high speed rotary union.

We are a high speed rotary union supplier, please feel free to contact us if you need them.

What Is Abrasion Resistant Steel?

AR steel plate is a high-carbon composite steel plate, which means that AR is formable and climate-safe due to the additional combination. This is even more difficult due to the choice of carbon. The carbon element is included in the development of the steel plate, which impressively establishes the hardness and durability, but reduces the quality. Since then, the plates have been used under conditions where mileage and scratching areas are the main drivers of disappointments. Currently, materials with or without "f" are compatible, but traditionally, materials with "f" basically indicate that it is formable and can be bent in a specific way without breaking. When the factory produces non-formable and formable steel plates at the same time, forming is more costly to some extent. However, increasing attention and diminishing interest have led to the creation of formable AR steels.

AR material is made of hardened steel square or metal. During this process, the grain structure changes to expand the hardness and support formability, resulting in through hardening of the material. Quenching and tempering is a two-stage process:

Quenching refers to placing steel at a high temperature between 1500-1650 degrees Fahrenheit and then rapidly cooling it with water. This process shapes the gem structure inside the iron and increases the hardness.



Tempering is to reheat the quenched steel to 300-700 degrees Fahrenheit below the initial temperature, and then allow the steel to cool at a typical air temperature. Reheating the material separates the precious stone structures framed during the quenching process. At the same time, extended cooling allows for the reform of the gem structure, maintaining a more important part of quality and hardness, but increasing flexibility.

Wear-resistant steel is made of iron minerals, carbon and other alloy components, just like different steel types. The iron metal is dissolved in an impulse heater, which will expel harmful substances in the minerals. Carbon and other alloy components are included during this time. Especially wear-resistant steel contains additional carbon and alloying elements. A substance that prevents oxidation is added to the liquid pool. After that, the wear-resistant steel is formed, heated, and cut.

Applications for abrasion-resistant steel include dumping linings, construction accessories, conveyors, gratings, barrels, body armor and ballistic panels. Wear-resistant steel is valuable in any application where scratch and effect resistance are critical. Some standard investment projects include: mining, development, material dealing with and total.

Abrasion-resistant steel plate is excellent and wear- safe, guarding admirably against scratches and scrapes. This kind of steel plays an admirable role in the harsh environment, and offers some effect obstruction. Wearing a safe steel plate will ultimately help extend the life of the application and reduce your expenses in the long run.

We are Abrasion-resistant steel suppliers. Please feel free to contact us if you are interested in our abrasion-resistant steel or other products.

Production Process Of Wear-Resistant Steel

 

 

Process Development

In recent years, the surface strengthening technology of steel materials has developed rapidly, and new technologies for the production of wear-resistant steel have emerged.

 

How Wear-Resistant Steel Is Made

Wear-resistant steel is smelted in electric furnaces or converters, and the products are mostly castings. In recent years, forging, rolling and other hot processing materials are increasing. The production method of wear-resistant steel parts used in general machinery is not very different from other workpieces. Only in the heat treatment process or surface treatment process should be required to achieve the need to ensure wear resistance. For those steel parts where the metallurgical purity of the material significantly affects the wear resistance, refining measures should be taken. And the harmful impurities and gas limit requirements. In addition to the matrix, the number, shape and distribution of the second phase often have a significant impact on the wear resistance of steel parts. At this time, it is necessary to consider the design of the chemical composition of steel, smelting, hot processing, heat treatment (including thermomechanical treatment) and so on, in order to strive to achieve the requirements of improving wear resistance from metallurgical factors.

 

Processing Method

1. Through relevant process tests, master the general characteristics and cutting thickness range of various cutting methods of steel plates.

2. Steel plate cutting methods are applicable to cold cutting and thermal cutting. Cold cutting includes water jet cutting, shearing, sawing or abrasive cutting. Thermal cutting includes oxygen-fueled flame cutting ('flame cutting'), isoparticle cutting and laser cutting.

3、Flame cutting of high grade wear resistant steel is as simple as cutting of ordinary low carbon and low alloy steel. When cutting thick plates of wear-resistant steel, it should be noted that as the thickness and hardness of the steel plate increase, the tendency of cracking at the cutting edge increases.

 

How To Enhance Wear Resistance

Different surface strengthening techniques can be chosen to improve the wear resistance of steel parts under various types of wear conditions. Replace expensive alloy steels with less expensive base materials. Carburizing, carbonitriding, nitriding and other processes are still the main measures to strengthen mechanical parts. The use of co-infiltration, compound infiltration, boron infiltration, metal infiltration, spray welding, overlay welding, vapor deposition, electro-brush plating, ion injection and other processes in various working conditions of different parts have achieved significant results in improving wear resistance. In addition, casting processes such as casting infiltration and composite casting are also used in the manufacture of wear-resistant steel parts.

We are a wear resistance steel supplier, please feel free to contact us if you need them.

Understanding Abrasion And Wear-Resistant Steel(AR Steel)

Not all steels are the same. In fact, there are more than 3,500 different grades of steel, each containing unique physical, chemical, and mechanical properties to make them "custom-tailor" to suit specific applications. Even in certain steel groups, such as abrasion and wear-resistant steel (AR steel), there are many different grades, each with different chemical and mechanical properties, resulting in different properties.

 

Countless shadows of tough

Each number of these AR steel types refers to the hardness of the steel measured on the Brinell hardness scale. However, the processes used by the manufacturers of these AR steel grades can be very different, using different alloys, chemistries and heat treatments to achieve the specified hardness, yield, tensile strength and elongation of the final product. They are all wear-resistant, they all meet the Brinell hardness requirements, but they are all made by very different methods.

 

What makes steel AR?

AR steel alloy is made of steel billets containing different alloying elements such as carbon, manganese, chromium, nickel and boron. Of all these alloys, carbon is the most important for making steel wear resistant because it increases hardness and toughness. Then AR steel is produced through the "Quenching and Tempering" (Q&T) process, in which the grain structure is changed, the toughness is improved, and the brittleness is reduced.

Q&T is a two-stage process: when steel is brought to about 1500 degrees Fahrenheit and then cooled with oil, water or air, quenching occurs. This process increases the hardness. Tempering is the process of heating steel to approximately 300-700 degrees Fahrenheit, which makes the steel tougher.

 

 

Although the high-carbon alloy and Q&T treatment make the steel harder, it also reduces its tensile strength. Therefore, AR steel is used in situations where wear, abrasion, tearing and impact are the main issues, rather than constant tension or pressure. Therefore, AR steel is not suitable for structural structures such as beams in bridges and buildings. Common uses are in barrels, grilles, chutes, conveyor belts, mine bags, and armored vehicles and targets.

 

Better quenching, better steel

Most AR steels are water quenched because this is the fastest and cheapest option. Other AR steels are quenched by water, which destroys the grains, causing the microstructure to resemble a falling "pick-up sticks", making it more likely to be scratched and torn, and accelerate wear and deforming the steel.

Abrasion resistant steel is a steel material with strong wear resistance containing chemical elements such as silicon, manganese, chromium, copper, vanadium and so on.

Abrasion-resistant (AR) steel plate is a high-carbon alloy steel plate. Due to the addition of alloys, AR has formability and weather resistance. Due to the addition of carbon, its hardness is higher.

We are AR steel suppliers. If you need abrasion or wear-resistant steel materials, give us a call and let us know the application, conditions, and components you need from your steel. Our team will work with you to recommend unique steel varieties that are very suitable for your application.

Abrasion-Resistant Steel Plates For Long Service Life In Harsh Conditions

Abrasion-Resistant Steel Plates For Long Service Life In Harsh Conditions

Abrasion resistant (AR) steel plate is a specially designed high-carbon alloy steel with greater hardness than low-carbon steel.

Hardness is usually at the expense of strength, which makes AR wear-resistant steel an ideal material for harsh, high-wear conditions, rather than for structural applications.

Unlike many structural steels, AR is not subject to any ASTM codes or specifications, nor does it require specific chemical compositions. In fact, the composition of AR steel varies from mill to mill. On the contrary, hardness (Brinell hardness unit) is the most important factor for engineers when evaluating AR steel plate materials.



What are the benefits of AR steel?

In applications involving impact and/or sliding contact with abrasives, the benefits of using wear-resistant steel plates are huge.

Abrasion resistant steel plates are very durable, wear-resistant, and prevent wear and scratches. This type of steel works well in demanding applications and also provides a certain degree of impact resistance. Wear-resistant steel plates will ultimately help extend the life of your application and reduce your costs in the long run.


Industrial AR steel plate

Abrasion resistant steel plates are widely used in energy, industrial manufacturing, infrastructure and other fields. Other applications include:

Mining

Construction

Material handling

There are wide range of applications of wear-resistant steel plates.


AR products are ideal products for a range of applications such as mining/quarrying, material handling and construction, conveyors and earthwork transportation.

AR steel plate is the steel plate chosen by designers and factory operators when they need to extend the service life of key components and reduce the weight of the unit. In applications involving impact and/or sliding contact with abrasives, the advantages of using wear-resistant steel plates are huge.

The steel plate used under abrasive conditions is not typical because it does not have any ASTM specifications or guidelines. Many steel plate manufacturers produce their own AR steel brands, and these products are usually distinguished by the brand name followed by the hardness of the steel which is measured in Brinell hardness units.

We are AR steel plate manufacturers. Please feel free to contact us if you are interested in our products.

Abrasion-Resistant Steel Plates For Long Service Life In Harsh Conditions

Abrasion-Resistant Steel Plates For Long Service Life In Harsh Conditions

Abrasion resistant (AR) steel plate is a specially designed high-carbon alloy steel with greater hardness than low-carbon steel.

Hardness is usually at the expense of strength, which makes AR wear-resistant steel an ideal material for harsh, high-wear conditions, rather than for structural applications.

Unlike many structural steels, AR is not subject to any ASTM codes or specifications, nor does it require specific chemical compositions. In fact, the composition of AR steel varies from mill to mill. On the contrary, hardness (Brinell hardness unit) is the most important factor for engineers when evaluating AR steel plate materials.



What are the benefits of AR steel?

In applications involving impact and/or sliding contact with abrasives, the benefits of using wear-resistant steel plates are huge.

Abrasion resistant steel plates are very durable, wear-resistant, and prevent wear and scratches. This type of steel works well in demanding applications and also provides a certain degree of impact resistance. Wear-resistant steel plates will ultimately help extend the life of your application and reduce your costs in the long run.


Industrial AR steel plate

Abrasion resistant steel plates are widely used in energy, industrial manufacturing, infrastructure and other fields. Other applications include:

Mining

Construction

Material handling

There are wide range of applications of wear-resistant steel plates.


AR products are ideal products for a range of applications such as mining/quarrying, material handling and construction, conveyors and earthwork transportation.

AR steel plate is the steel plate chosen by designers and factory operators when they need to extend the service life of key components and reduce the weight of the unit. In applications involving impact and/or sliding contact with abrasives, the advantages of using wear-resistant steel plates are huge.

The steel plate used under abrasive conditions is not typical because it does not have any ASTM specifications or guidelines. Many steel plate manufacturers produce their own AR steel brands, and these products are usually distinguished by the brand name followed by the hardness of the steel which is measured in Brinell hardness units.

We are AR steel plate manufacturers. Please feel free to contact us if you are interested in our products.