The valves used in coal plants should be multifaceted. Out-of-stock desulfurization systems should take into account the temperature and corrosiveness and seal leakage criteria. Commonly used butterfly valve, ball valve and gate valve. Materials handling system will be used pneumatic knife gate valve, plug-in valve, powder special butterfly valve, V-type ball valve, ceramic valve, screw conveyor valve also takes into account the wear resistance. Commonly used water system ordinary soft-seal butterfly valve can be. Ammonia ammonia minimum standard stainless steel 304 material ball valve, small-caliber with three-piece threaded ball valve, large diameter flange with two-piece ball valve, the seal is good. Chemical valves and coal chemical project valves Chemical valves are an important accessory for fluid control in industrial pipelines. Facing a wide variety of industrial systems and valve conditions, the Chemical Valve is intended to choose the right chemical valve for the piping system. Chemical valves Overview: Chemical valves are an important accessory for fluid control in industrial pipelines. Faced with a variety of industrial systems complicated and a wide variety of valve conditions, you want to select the appropriate valve for the pipe system, one should understand the valve performance, the second should be mastered Select the steps and basis for the valve, three should follow the principle of choice of oil, chemical industry valves. Chemical valve is not only applicable to a wide range, but also the amount of more, of course, chemical valves than the average valve to be higher. Chemical valves generally use the media are relatively easy to corrosion, a simple chlor-alkali industry, to large-scale petrochemical enterprises, there are high temperature, high pressure, corrosion resistance, wear resistance, great temperature pressure difference. The face of such a higher risk of the valve, the selection and use of the process should be strictly in accordance with the implementation of chemical standards. Chemical valve selection principle: The chemical industry generally chooses the straight-flow valve as the flow passage, the flow resistance is small, it is usually chosen as the valve for cut-off and open media, the valve for easy regulation of flow is used as control flow, and the stopcock and ball valve are more suitable for commutation and shunting , Closure along the sealing surface sliding with wiping the valve is most suitable for the medium with suspended particles. Common chemical valves are ball valves, gate valves, globe valves, safety valves, plug valves, check valves and so on. Chemical valve media with the mainstream of chemical substances, including acid-base corrosion of a wide range of media, the main 304L and 316 in the material-based, common media should also choose 304 as the leading material, a variety of chemical corrosive fluids should be selected alloy steel or liner Fluorine valve. The role of chemical valves: Opening and closing role: cut off or communicate the flow of fluid in the tube; Regulatory effect: regulate the flow of the tube, the flow rate; Throttling effect: the fluid through the valve after a great pressure drop; Other functions: a. Automatic opening and closing b. To maintain a certain pressure c. Chemical valve precautions before use: â‘ valve inside and outside the surface with or without blisters, cracks and other defects; â‘¡ valve seat and the valve body is firmly bonded, valve plug and seat are consistent, sealing surface without defects; â‘¢ stem and spool connection is flexible and reliable, whether the valve stem bending, thread damage; â‘£ valve opening is flexible and so on. Chemical valve often used in the process of problems 1, flanges and pipelines connected with pipelines; 2, packing culvert leakage, lumbar pad leakage and stem open; 3, between the valve core and the valve lax between the formation of internal leakage There are many kinds of candle, which can be divided into two categories: daily lighting candles (ordinary candles) and crafts candles (special purpose candles). Light candles are relatively simple, usually white rod - shaped candles. The craft candle can be divided into many kinds, first can be divided into the jelly craft candle and the incense craft candle two kinds. By adding ingredients commonly show all sorts of color, such as birthday candles, shape also because of the need to make it all sorts of forms, such as spiral shape, Numbers, etc.), but with its novelty, a decorative, ornamental and functional. The flame of the candle is divided into three parts, which can be divided into outer flame, inner flame and flame heart. The outer flame temperature is the highest, the flame core temperature is the lowest, the inner flame brightness is the highest. Candle also can be divided into two kinds of, thick and smooth surface wax wax, wax surface are often taste with general coarse surface, on which there is a frost, different rough surface wax will bring different smells, such as can put some lavender flavour of candles in the bedroom, have the effect of hypnosis, calm, Marine smell in the bathroom can put candles, summer can also put some loose flavour annoys mosquitoes candle; And the surface wax has no taste, the wax body surface is very smooth, easy to make very beautiful modelling. According to the shape of the candle, it can be divided into extruded cylindrical wax, pointed bamboo wax, torch wax, waxy wax, round head wax, flat head wax, etc., and there are many colors. These candles when use some comparison pay attention to, such as bamboo wax, suitable for plug on the candlestick, at dinner on the table in the middle, especially common in western food, if home decorating is Europe type style, also can put in the sitting room as a decoration. The wax is often found in a bar, in a vessel of water, and the wax on the water, it floats on the surface of the water, under the secret candlelight. Waxes are used in young people's homes, especially lovers, candlelight dinners can not only be used with pointed bamboo wax, but also can bring good results. Common Candle,Common White Candles,Common Pillar Candles,Common Red Candles Aoyin xingtang candle co.,ltd , https://www.allincandle.com
Which valves are coal chemical special valve?
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