Page 8 of Topper Forged Valve News

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Production Technology of Forged Valve

Process design: Advanced manufacturers generally adopt computer simulation technology, computer-aided process design and virtual technology of hot working, which improves the level of process design and product manufacturing capability. Introduce and apply simulation programs such as DATAFOR, GEMARC/AUTOFORGE, DEFORM, LARSTRAN/SHAPE and THERMOCAL to realize computer design and hot working process control. Forging technology: Most hydraulic presses above 40MN are equipped with 100-400t.m main forging...

Casting and Forging Adopt Two Different Processing Techniques

Foundry is to change shapeless molten metal into a shaped solid. A cast valve is a valve made by casting. Forging is mainly formed by extrusion at high temperature. It can refine the grains in the manufactured parts. Forged valves are forged out. Types of forging: Classified by deformation temperature: When the temperature exceeds 300-400℃ (blue brittle zone of steel) and reaches 700-800℃, the deformation resistance will decrease sharply and the deformation energy will be greatly...

Overview of Development in Forged Flange Industry

A flange, also called a rim or ridge, is mainly used to connect tubular parts. Flanges are widely used in mechanical parts, such as petrochemical pipelines, metal pressure vessels, water and sewage pipelines of buildings, municipal water supply pipelines, ships, electric power and other industries. According to different raw materials used, flanges can be divided into carbon steel flanges, stainless steel flanges and alloy steel flanges; according to different manufacturing processes, flanges...

How to Improve the Qualified Rate of Forging Products?

As we know, some valve bodies (such as flanged ball valves) are traditionally produced by casting, but about 30% of them are unqualified and unstable in performance during processing and pressure test, which has a great impact on the use of valves. In order to solve this problem, some manufacturers have broken through the traditional processing technique. The valve body is produced by forging, forging all parts of the forged valve integrally, forging the valve body by one-time hot die forging,...

The Importance of Forging

Forging production is one of the main processing methods to provide mechanical parts workblank in mechanical manufacturing industry. By forging, not only the shape of mechanical parts can be obtained, but also the internal structure of metal can be improved, and the mechanical and physical properties of metal can be improved. Generally, forging production methods are used to manufacture important mechanical parts with high stress and high requirements. For example, important parts such as shaft,...

Analysis on the Development of Forging Industry

Modern forging industry has a history of hundreds of years in developed countries such as Europe and America. Therefore, advanced forging technology has been monopolized by Germany, America, Japan and Russia. China's forging industry started later than that of developed countries, thus many key forging products mostly depend on imports. However, with the development of social economic level and the increase of communication opportunities with foreign countries, China's forging...

How to Improve the Quality of Forged Valves?

At present, China's valve forging industry has poor production skills and equipment; Independent innovation ability is relatively weak; The quality level of many valve castings is not good enough. Problems like serious environmental pollution, high consumption of energy and materials, have long hampered the development of China's valve forging industry. Therefore, China is still far from the goal of becoming a strong forging country. It is understood...

Characteristics of Forged Valves

Characteristics of Forged Valves: Compared with castings, forging process improves the organizational structure and mechanical properties of the metal. After the casting structure is hot processed and deformed by forging method, due to the deformation and recrystallization of the metal, the original coarse dendrite and columnar crystal grains are changed into equiaxed recrystallized structures with finer grains and uniform sizes, so that the original segregation, looseness, porosity, slag inclusion...

How to Increase Production of Forged Valves

As is known to all, the manufacture of forged valves is more difficult than that of cast valves. The specific reason is that cast valves can often be manufactured on a large scale, while forged valves need a certain time to be forged out. However, it can be clearly seen that the performance of forged valves is better in some aspects, which has prompted manufacturers to come up with the idea of increasing the output of forged valves. In fact, the way to increase the production of forged...

Forged Valves Have Fewer Disadvantages

No matter what kind of valve, its research and manufacturing process cannot be smooth sailing. Moreover, in the finished valve products, even the one with no defects in the manufacturing process and craft, it is inevitable that there will be some drawbacks. These shortcomings do not mean that there are quality problems, but that they may be insufficient in one aspect. Forging is a manufacturing method for metal appliances that has existed for a long time in our country, and valve is a...

Protective Measures for Valves Installation

Brief description: 1. When installing the valve, a filter and a flush valve are required to prevent metal, sand and other foreign matters from invading and damaging the sealing surface. 2. In order to keep compressed air purified, an oil-water separator or an air filter needs to be installed in front of the valve. 3. Considering that the working state of the valve can be checked during operation, instruments and check valves need to be set up. 4. In order to maintain the operating temperature,...

Brief Introduction about Valve Cleaning Procedure

Valves are widely used in our daily life. This "switch", which is mostly used to control the flow of liquid, plays a vital role in the whole fluid operation. Do you know all about the cleaning work of the newly bought valve before installation? Valve cleaning work is very important, which determines whether the valve can play its due role in future operation. So, what should be paid attention to in general cleaning work? First of all, we know that the valve...

Rules for Maintenance of Forged Steel Gate Valves

1. When the forged steel gate valve is to be stopped for using, first close the gate valve and pressure gauge, and then stop the motor. 2.When the forged steel gate valve is laid up for a long time or used in cold winter season, the drain plug at the lower part of the pump shall be unscrewed to release the medium, which prevent frost cracking (In case of sewage, please clean the valve body with clean water). 3. Listen carefully to see if the running sound of the...

Installation of Forged Steel Gate Valve

1. Handwheel, handle and transmission machine are not allowed to be used in lifting state while any collision is strictly prohibited. 2. Double gate valve should be installed vertically (i.e. valve stem is in a vertical position with handwheel at the top). 3. The gate valve with a bypass valve should give priority to the opening of the bypass valve (to balance the differential pressure between the inlet and outlet and to reduce the opening force). ...

What are the Differences between Forged Steel Ball Valves and High Pressure Ball Valves? (Part Two)

Note the following points in the use and maintenance of high pressure ball valves. When ball valves are closed, there still pressure fluid exits inside the valve body. Lubricate high pressure ball valves with lubricating grease. The lubrication grease should be compatible with metal materials, rubber parts, plastic parts and working media of ball valves. Lubricate grease on the surface of the sealing elements' installing groove, rubber sealing elements as well as the sealing surface and...

What are Differences between Forged Steel Ball Valves and High Pressure Ball Valves?(Part One)

Both forged steel ball valves and high pressure ball valves are widely applied to industries. What are the differences between these two kinds of valves? Materials of the valve body of the ball valve can be roughly divided into two kinds: casting materials and forging materials. Materials of forged steel ball valves are made by forging, and there are various forging materials including A105, LF2, F304 and F316. Forged steel ball valves can be made into valves of high pressure, medium pressure and...

Installation and Maintenance Instructions of Forged Steel Ball Valves (Part Two)

When forged steel ball valves are used, many problems are not caused by their own quality but their inappropriate installation and use. Inappropriate installation environment and positions, wrong directions or unclean pipelines can lead to problems of forged steel ball valves. Therefore, following aspects should be paid attention to when forged steel ball valves are installed and used. Forged steel ball valves belong to field instruments, which demand that environmental temperature should be within...

Installation and Maintenance Instructions of Forged Steel Ball Valves (Part One)

If forged steel ball valves in the original system are heavily maintained, the sealing performance of the stuffing boxes as well as the parts such as joints are supposed to be checked carefully. In order to make sure that forged steel ball valves can be operated normally and the pipeline system can run smoothly, whether the information on the data plates of forged steel ball valves is in consistent with the design requirements should be checked first before the new forged steel ball valves are operated...

Nine Advantages of Forged Steel Ball Valves

One of the advantages of the forged steel ball valve is its small flow resistance which can be zero actually. The sealing performance of the forged steel ball valve is reliable because most valve seats of forged steel ball valves are made of PTFE elastomer so that the effect of complete sealing can be achieved under high pressure and temperatures. The forged steel ball valve has good corrosion resistance and long service lives. The major material of the forged steel ball valve's valve...

Matters Needing Attention of Forged Steel Gate Valves (Part Two)

After the pressure test of forged steel gate valves, the pressure of the gas and water in the sea cavity rises as the temperature rises. In order to grease the valve smoothly, the valve cavity should be empty and the pressure of the valve need to be reduced before the valve is greased. Reducing the pressure of the gate valve in time can ensure the safety of the forged steel gate valve and the greasing process. After the greasing process, the gas and water in the seal cavity are completely replaced...

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Launched in 1988, Topper Forged Valve Company is engaged in manufacturing forged steel valves. Our products cover Forged Steel Ball Valve, Gate Valve, Check Valve, Globe Valve, According to API, BS, DIN, JIS GB Standards.

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NO. 879, Xiahe Road, Xiamen, Fujian, China

086 592 5819200

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