The imported control valve is the dominant battle of the valve in the placement of kerosene chemical production. The variety of valves is vast, and with the continuous innovation of various complete sets of maintenance processes, the varieties of valves are still continuing to fill. According to the secret investigation, the petrochemical valve is divided into the following categories:
1. Gate valves, drop-off valves, plug valves, ball valves and butterfly valves used to intercept or connect the medium in the pipeline;
2. Adjustment valve (pneumatic and electric), inlet control valve, pressure reducing valve, saving valve, butterfly valve, equalization valve, etc. for medium pressure and flow in the laying pipeline;
3. Check valve used to stop the backflow of the medium and the one-way shaking of the insurance medium;
4. It is used for over-temperature and over-pressure caressing, discharging excess medium, and highlighting the positive value of the square robe and pressure, so as to ensure the quiet operation of the construction and pipeline system.
5. The target used to convert the intermediary diameter of the pipeline, the distribution valve, the three-way or four-way plug valve, the three-way or four-way ball valve, etc., which are infected by the diversion medium;
6. A sampling valve for sampling discussion of medium;
7. Other special use of traps, sewage valves, venting valves, slag discharge valves, etc.
The core of the prosperity of petrochemical valves is the construction of new valves for large-scale petrochemical industry, petroleum natural gas gathering and transportation pipelines, coal liquefaction and other projects, such as 800,000 tons of ethylene above Hebei miscellaneous evil configuration cracking furnace outlet pipeline with high-temperature valves, large-diameter high-pressure ball valves, large-diameter oil pipeline ball valves, and low-temperature valves for liquefied natural gas.
Over the years, the localization level of valves for petrochemical industry in China has been increasing continuously, and it has a place in the high-end market. CNNC Su Valve and Lanzhou High Pressure Valve have become domestic emergency suppliers of special valves for large-scale ethylene complete sets of equipment in China. Among them, the self-developed hydrogenation assembly valve of CNNC Suzhou Valve Co., Ltd. has been successfully controlled in the localization project of Dongfang Chemical Plant. In this range, the nuclear Su valve only supplies nearly 100 million yuan of special valves annually, which makes the localization of large-scale ethylene complete sets of special valves for buildings a magnificent breakthrough. In addition, Zhejiang Huadong Valve has successfully developed new products such as hydrogenation valves and ethylene valves in the world; The special high-pressure mobilization butterfly valve for CO2 stripping urea and the high-temperature ball valve for mattress developed by Kaites; The encrypted anti-theft front valve of Chuanli intelligent valve industry has rewritten the sweat of the domestic hydrogenation valve sustenance entrance.
However, in the petrochemical industry, such as the high-pressure bellows valve in high-pressure polyethylene, the Qingjiao plate valve of ethylene cracking furnace, and the hub valve of ultra-high temperature and high pressure or ultra-low temperature of ethylene over 2500 pounds still need to be imported.
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