Selection points of wear-resistant ball valve


The wear-resistant ball valve is evolved from the function of the plug valve. Its opening and closing part is a ball core, and the valve is turned on and off by its valve stem turning 90 degrees. The wear-resistant ball valve is mainly used for cutting, distributing and changing on the pipeline. The medium flow direction, the V-shaped ball valve designed with V-shaped opening also has good flow regulation performance.
The reason why it is widely used in modern industrial occasions is because the ball valve opens and closes quickly, has good sealing performance, simple structure and low flow resistance.
The structural classification of ball valves is based on:
Ball valves can be divided into fixed ball valves, floating ball valves, orbital ball valves, V-shaped ball valves, eccentric semi-ball valves, three-way ball valves, four-way ball valves, etc.
According to the connection method, it can be divided into flange ball valve, wafer ball valve, internal thread ball valve, external thread ball valve, welded ball valve, clamp ball valve (usually sanitary ball valve), ferrule type ball valve, etc.;
According to the sealing material, it can be divided into soft sealing ball valve and metal hard sealing ball valve.
Soft-sealed ball valves are generally suitable for media with a temperature less than 150 degrees, and for media above 150 degrees, PPL seals or hard alloy metal seals are used.
Small-diameter ball valves generally use floating ball valves and large-diameter ball valves. Because the required opening and closing torque is relatively large, fixed ball valves are often selected, which can reduce the torque required for opening and closing and improve the reliability of work. V-shaped ball valve and eccentric half-ball valve can be used to adjust the flow, and three-way ball valve and four-way ball valve are used to reverse the flow.
The commonly used materials for ball valves are carbon steel, 304 stainless steel, and 316 stainless steel. For extremely corrosive media, the valve body and the ball are fully lined with PTFE.
The main driving methods of the ball valve are electric, pneumatic, and worm gear transmission. Compared with the small-diameter ball valve, the handle is generally used to open and close.
Fire valves will be widely used in the three major industries in the future
It is understood that the market size of the fire valve industry in 2013 has expanded a lot compared with last year, which is an obvious fact. Until 2013, there were more than 700 manufacturers and traders of various fire valves, and even more than 200 inquiries per day. It is obvious that the supply and demand market of fire valves is heating up. From the preliminary analysis of the first quarter data, it can be concluded that the demand market for fire valves is 20% higher than last year.
In the past ten years, with the development of my country’s fire valve (valve industry trends) industry, the varieties and specifications of fire valves are also increasing, and there are more and more industries applying fire valves, such as petrochemical industry, oil refining industry, nuclear power industry, thermal power It is widely used in industries, etc. The following will take you to understand the development prospects of fire valves in the following three industries.
Petrochemical industry: The competition in the petrochemical industry has always been fierce, and the requirements for fire valve equipment are relatively strict. In the future, fire valves will cooperate with industrial automation to promote the overall level of fire valve equipment and develop multi-functional, high-efficiency, low-consumption petrochemicals. Fire valve equipment. The annual output value of my country’s petrochemical enterprises is in the hundreds of billions, which shows that my country has a large fire valve market (valve, water pump), we should consider from the perspective of market changes, to ensure stability and development.
Oil refining industry: After 60 years of development, my country’s oil refining industry has rapidly expanded its production scale. Driven by a series of policy measures, the output value and output of my country’s oil refining industry continued to grow in 2010, the structural adjustment was gradually advanced, and continued to maintain a good momentum of development. In 2010, the oil refining industry achieved an output value of 2,425.2 billion yuan, a year-on-year increase of 38%. Therefore, it can be seen that the application market of fire valves in my country’s oil refining industry is huge.
Nuclear power industry: Fire valves are the basic equipment of nuclear power equipment in this industry, occupying roughly 5-10% of the capacity. China will continue its nuclear power development plan, reaching 40GW and 75GW of nuclear power capacity in 2015 and 2020, respectively, and China will restart approvals for new nuclear power projects around mid-2012. Therefore, in this field, new products and new equipment should be continuously introduced to meet the market demand.
In addition, the construction and boiler industries and special industries require the application of fire valves. In particular, the use of spring-type fire valves is very extensive, and they are used in many enterprises, which fully shows that the development of fire valves is very rapid and the prospects are good. At the same time, more and more industrial applications have more new requirements for fire valve products, and the quality and technical requirements for fire valves are also getting higher and higher.

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