Low carbon energy saving valve product technology introduction

On the afternoon of September 1, at the "2010 Shanghai (2nd) Water Industry Hot Forum" hosted by China Water Network, Shanghai Municipal Engineering Design and Research Institute, Urban Investment Sewage, Shanghai Urban Drainage Co., Ltd. and China Association for Science and Technology, On the Zhengzhou City Butterfly Valve Co., Ltd. Zheng Zhao, senior engineer introduced several low-carbon energy-saving product technology. Zhao Guoxi introduced three new types of valves, respectively, eccentric hemisphere valve, ramp seat hard seal slow closing check valve and full pressure high-speed exhaust valve. Eccentric hemispherical valve body with ball structure, good rigidity, high strength; disc with hemispherical structure, the use of semi-shaft structure of the valve shaft, the valve fully open for all 90 ° rotation. Fully open state, all the valve into the body cavity, so that the valve cavity all smooth. Valve body and the valve sealing surface, are used carbide surfacing technology, high hardness, high wear resistance, can cut off the medium metal or woven sundries; resistant to slurry or granular two media flushing. Can automatically remove the sealing surface dirt. Large eccentric disc structure, sealing surface frictionless opening and closing, switch flexible, long service life. Valve shaft seal with flexible graphite ring or O-ring, without removing the drive to replace and adjust the shaft seal. Slant seat hard seal slow closing check valve seat is tilted, valve opening and closing stroke is short, opening and closing performance is good. The disc is double offset structure, the valve opening and closing movement is reasonable. Stainless steel metal seal, long service life, maintenance-free replacement. Valve cavity structural components flow characteristics, flow resistance, energy saving. Quick off slowly closed, can effectively prevent water hammer. Disc / valve opening and closing flexible, no card delay. Pressurized water supply pipe exhaust problem is a worldwide technical problem for decades. Owing to the poor exhaust of pressured water pipelines and the unsteady operation of gas-water two-phase flow, it causes the pipe breakage to close the water hammer and its pressure is often increased Up to 200 ~ 400m water column, and some engineering calculations, even up to nearly 1000 meters, enough to cause any high-intensity water supply pipe damage. In fact, large-scale water delivery projects in China and urban water supply pipe network burst pipe accidents are many. According to relevant information, the pipe explosion in our megalopolis such as Beijing, Shanghai and Hong Kong is about 2000 times in a year, and the pipe explosion in a general provincial capital city is about 1000 times a year. The main reason for its hydraulic power is poor exhausting. Full pressure high-speed exhaust valve research purpose is to solve the pressurized water supply pipe exhaust net and instability, reduce or completely eliminate the urban water supply pipe burst tube illness. Full-pressure high-speed exhaust valve in the pressurized water vapor phase and other fluid state, does not produce "gas care", the exhaust valve can be continuously high-speed exhaust; without artificial exhaust, you can quickly discharge any complex tube Memory gas truly automatic exhaust valve; with the theory of water hammer protection requirements of the buffer function, the anti-start pump water hammer, stop the pump off the flow of water hammer and eliminate pipe pressure oscillations harm the best; advanced exhaust port seal , Overcoming the common performance of ordinary exhaust valve running water performance defects. More Keywords Search: Valve

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