With the continuous development of industry, volcanic rocks in some technology use, in order to achieve better development of volcanic rocks, can achieve better development in such progress, and now some technology can be better realized. Advances in science and technology have made better use of volcanic rocks. What are the structural characteristics of volcanic rocks?
The surface layer is pumice stone, the color is black cyan, the texture is light and hard, and it is the superior material in the construction and grinding industries. Due to the increased pressure and fine pores in the middle layer, the plate is processed with fine texture, heat resistance, anti-sun and anti-skid, water absorption, sound absorption, abrasion resistance, acid resistance, strong adhesion to concrete, no weathering, no fading The advantages of preventing and treating diseases such as rheumatism and athlete's foot. At the same time, the natural texture and rustic color of volcanic rocks return to the cultural concept of nature, which is an excellent material for today's architecture.
The physical structure characteristics of volcanic rock biological filter material: the surface is rough and microporous, these characteristics are especially suitable for microorganisms to grow and multiply on the surface to form biofilm. The volcanic rock filter makes the biological aerated filter not only treat municipal sewage, biochemical organic industrial wastewater, domestic drainage, micro-polluted source water, etc., but also can make tail water after the secondary treatment process of the sewage treatment plant. In-depth treatment, which can be used for reuse of water after treating the water to reach the water reuse standard.
The structural characteristics of volcanic rocks are able to develop better with the development of science and technology, and can achieve better development in some technological applications.
The disc of the wafer butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc-shaped disc rotates around the axis, and the rotation angle is between 0° and 90°, which can play the role of flow regulation. When the disc rotates to 90°, the valve reaches the maximum opening.
Compared with the gate valve, the wafer butterfly valve has the characteristics of simple structure, small volume and light weight.
It consists of only a few parts. And it only needs to rotate 90° to open and close quickly, the operation is simple, and the valve has good fluid control characteristics.
When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is very small, so it has better flow control characteristics. Butterfly valve has two types of sealing type: elastic soft seal and metal seal. Elastic soft sealing valve, the sealing ring can be embedded on the valve body or attached to the periphery of the disc.
Valves with metal seals generally have a longer life than those with elastic seals, but it is difficult to achieve complete sealing. Metal seals can adapt to higher operating temperatures, while elastic soft seals have the defect of being limited by temperature.
When the project is used and installed, the double-headed butterfly valve is connected between the two pipeline Flanges with stud bolts, and the flanges at both ends of the valve are connected to the pipeline flange with bolts.
The wafer butterfly valve has good sealing performance, light operation, secondary corrosion, high temperature resistance, convenient operation, flexibility, safe and reliable use, and has been widely used.
Widely used in cooling water systems of petroleum, gas, chemical, water treatment, thermal power stations, and SO2, steam, air, gas, ammonia, CO2, oil, water in chemical, petrochemical, smelting, pharmaceutical, food and other industries , Brine, lye, seawater, nitric acid, hydrochloric acid, sulfuric acid, phosphoric acid and other media pipelines are used as adjustment and interception devices.
Divided by structure
(1) Center sealing butterfly valve (2) Single eccentric sealing butterfly valve (3) Double eccentric sealing butterfly valve (4) Triple eccentric sealing butterfly valve
According to the sealing surface material is divided into
(1) Soft sealing butterfly valve.
1) The sealing surface is composed of non-metallic soft material to non-metallic soft material.
2) The sealing surface is composed of metal hard material and non-metal soft material.
(2) Metal hard sealing butterfly valve.
The sealing surface is composed of metal hard material to metal hard material.
Divided by material: cast iron, cast steel, stainless steel
Butterfly Valves,Ss Butterfly Valve,Stainless Steel Butterfly Valve,Stainless Butterfly Valve
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