Butterfly valve not only in petroleum, gas, chemical, water treatment and other general industrial applications, but also used in thermal power station cooling water system, can be said that the use of wide, large role, this issue editor will take you to observe several butterfly valve, teach You buy a few tips butterfly valve. Butterfly valve structure is simple, small size, light weight, only a few components. And just turn 90 ° to quickly open and close, easy to operate, while the valve has good fluid control features. When the butterfly valve is fully open, the thickness of the disc is the only resistance to the flow of the medium through the valve body, so the pressure drop across the valve is small and therefore has good flow control characteristics. Butterfly valve seal and metal seal two types of seal. First, the flexible seal valves, seals can be embedded in the body or attached to the butterfly plate around. The following describes this flexible hard-sealed butterfly valve from Beijing Wanye Hongda Trading Co., Ltd. Use: The butterfly valve for food, medicine, petrochemicals, industrial and environmental protection and high-rise buildings and pipelines to regulate flow and cut off the best location of the fluid. Structural features: The butterfly valve absorption, digestion of foreign technology, combined with the views of domestic users and production of accumulated experience in carefully developed a new generation of products: 1, the use of three-dimensional eccentric structure, the body sealing ring with flexible metal ring so that the butterfly plate With the sealing surface of the valve uniform and reliable contact, can reach its seal five slope; 2, unique structure, flexible operation, labor-saving, convenient, long service life; 3, high temperature, corrosion resistance, wear three dimensional eccentric. The main technical parameters: Nominal diameter DN (mm) 50-1200 Nominal pressure PN (MPa) 1.0 1.6 2.5 4.0 Test pressure PS (MPa) Strength test 1.5 2.4 3.75 60 Seal test 1.1 1.76 2.75 4.4 Media Medium Water, steam, oil , Acid corrosive, etc. Applicable temperature -40 ℃ -600 ℃ Second, the use of metal seal valve Generally flexible than the valve life, but it is difficult to be completely sealed. Metal seals can adapt to higher operating temperatures, while flexible seals have temperature-limited defects. If the butterfly valve is required to be used as a flow control, the main choice is the correct size and type of valve. Here to introduce you to this metal seal valve from Gongyi City Xinda Water Supply Materials Co., Ltd. SPD341H three eccentric two-way all-metal sealing butterfly valve All-metal sealing butterfly valve, is a high-tech development company developed a New structure of the butterfly valve. The highest pressure level of the valve (10.0MPa), the applicable temperature -20 ℃ --600 ℃, the maximum nominal diameter, has been manufactured to 2400mm. The plant in the development of all-metal sealing butterfly valve, invented a three-eccentric tapered tapered metal seal, good sealing performance, and can adapt to sudden changes in media pressure and temperature of the occasion. Because the butterfly valve is generally all-metal structure, does not contain any asbestos, graphite cushioning material will not cause the media pollution, it is particularly suitable for petrochemical, power generation, metallurgy, medicine, beverage, industrial requirements. All-metal seal butterfly valve body is divided into two forms of cast steel and welded, this structure of the butterfly valve if the full metal seal into tetrafluoroethylene as a sealing material, can become a PTFE sealed butterfly valve. This butterfly valve can achieve zero leakage. Butterfly valve seals with a full metal ring, seat sealing surface using the body or direct surfacing materials, sealing performance and reliable. Third, the commonly used butterfly valve clamp butterfly valve and flange two. On the folder type butterfly valve is to use double-headed bolts to connect the valve between the two pipe flanges, the following pair of clip-on butterfly valve from Kunshan Qin Yang Machinery Co., Ltd. Qin Yang wafer butterfly valve W Series Click here to view all news photos Detailed Description This series of butterfly valve with a neutral design, the main structure of the valve by the valve body, disc, valve seat, stem and transmission operating mechanism and other components, the valve seat can be detachable structure, and according to different physical and chemical properties , For the corresponding high temperature, low temperature, corrosion resistance, light resistance, anti-aging materials. It can be widely used as water supply and drainage, sewage, construction, air conditioning, petroleum, chemical, food, medical, textile, papermaking, hydropower, shipbuilding, metallurgy, energy systems and other fluid lines as regulating and intercepting device. Technical parameters Operating temperature -10-80 ℃ Nominal pressure PN10 / 16 PN Nominal diameter DN50-DN600 mm Other parameters Body material Ductile iron flanged butterfly valve is flanged on the valve, the valve on both ends of the method with a bolt Blue is attached to the pipe flange. Please come from this Hebei Grand Valve Group Co., Ltd. production of flanged butterfly valve. Hebei lofty flanged butterfly valve Products: This series of disc valves for water systems, power plants and industrial pipe as a two-way opening and closing and regulating equipment, the adjustment range of 0 degrees to fully open 90 degrees If using one-way flow, please install in the direction of the arrow outside the valve body. The valve disc of this series adopts flow-through design and is made of high strength ductile iron to ensure the strength under water impact and reduce the head Loss, the rubber ring with pressure ring fixed on the valve body, easy adjustment, can be firmly fixed to the body, without the impact of the water shedding. Editor's Summary: The strength of the valve performance refers to the ability of the valve to withstand medium pressure. Valves are mechanical products subject to internal pressure and must therefore have sufficient strength and rigidity to ensure long term use without rupture or deformation. Therefore, the editor recommends that you buy the valve, take the time to refer to the performance parameters of the product, the purchase of high quality and durable butterfly valve.
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