The hot oil boiler has been manufactured as radiation-type; Hot oil boiler have spiral oil pipes, from seamless steel boiler tube, wrapped up with one-, two- or three-way screw-steps depending upon the capacity and the velocity values, the flow of the gases have been designed as three-directional. The most critical place in all the installment is the hot oil boiler serpentines, since this is the hottest place. The other parts of the installment are less hot as compared to here, due to this reason, the velocity of oil at the serpentines have been adjusted according to the number of tubes openings at the manufacture. Since all the oil inside the system passes from the boiler spirals, the flow is fully under control. Thus, the safely heating of the heat carrier is obtained.
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As the country's policy of accelerating the revitalization of the equipment manufacturing industry is gradually advancing, the development of the general basic manufacturing industry will be further supported. China is facing an era of industrialization. The use of large valve manufacturers in the petrochemical industry, the power sector, the metallurgy sector, the chemical industry, and the urban construction will increase the demand for valve products.
At present, the number of domestic valve companies is large, and the development of the valve industry is relatively mature. In particular, ball valves, butterfly valves, safety valves, check valves, throttle valves, plug valves, and pressure reducing valves have been well developed.
Machinery industry analysts pointed out that with the continuous acceleration of the pace of valve industry restructuring, the future competition between the valve industry enterprises will be the product quality and safety of valve products and the competition between product brands, products to high technology, high parameters, resistant to corrosion, High life direction development. The domestic valve manufacturing industry is bound to show better development prospects under the huge demand environment.
China's valve industry is developing rapidly, but in the context of a good industrial situation, some issues are also worth worrying about, especially the domestic valve companies are mainly low-level, small-scale, family workshop-based enterprises. This is a big limitation and bottleneck for the future development of China's valve industry. The competition in the valve market is becoming more and more intense, and some ordinary valve product markets have become saturated and there is a situation where supply exceeds demand. This makes the development of SMEs more and more difficult. Even the products with relatively high technological content are highly competitive in the international market. At present, China has been able to provide a variety of products in the valve market: for example, heating valves, valves for environmental protection, and valves for construction. However, in the field of high pressure valves still rely on imports, this is the future of China's valves need to make breakthroughs in the field, in order to truly promote the development of China's valve industry.
According to the “2012-2016 China Valve and Coil Manufacturing Industry Development Prospects and Investment Forecast Analysis Report†published by Shangpu Consulting, it shows that starting from 2012, the localization of high-end valves has become very difficult. The current basic parts have become a shortcoming that restricts the development of domestic manufacturing to high-end development. During the 12th Five-Year Plan period, China will further increase the localization of high-end equipment components. Substitution of China's sub-sectors in the feasibility of valve import substitution is very different, high-end valves need more policy guidance and research support, the future of the domestic valve industry presents a good development prospects.