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原文
Metal valve market's two major drawbacks Generally speaking, China's metal valve prices relatively stable, although slightly down year, but the magnitude is very small. Found in North China valve market for the profit of many shoddy businesses, serious disruption of the valve market. Valve market, the main problems are: First, buy some of the operators of the site without the make, print, well-known brand-name manufacturers and certification of qualified valve causing serious harm to corporate reputation. Second, the renovation of the valve, used by some operators to re-paint the valve after the second sale, to the quality of the project has serious security risks. With oil development to the mainland oilfield and offshore oil transfer, and the power industry from 30 kw of thermal power to more than 300,000 kilowatts of thermal power and hydropower and nuclear power development, but also should be based device applications change the corresponding change in its performance and parameters. Urban systems generally use a large number of low-pressure valve, and to develop environmentally friendly and energy-saving, that is, from low-iron gate used in the past have gradually shifted the environment-friendly plastic sheet valve, balance valve, metal sealed butterfly valve and seal the center line transition . Oil, gas pipeline project to develop in the direction. From energy conservation perspective, the development of the steam trap to the subcritical and supercritical high parameter development. Power plant construction to large-scale development, so the need to use large diameter and high pressure and at the same time also used as a fast opening and closing valves. Complete the project needs, from single species to multi-species and multi-standard development. Project required a valve, a valve by the manufacturer to provide all of the trend is growing.
原文来自：http://www.zhihuifa.org

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从总体来说，我国五金阀门价格比较平稳，每年虽然略有升降，但幅度都很小。在华北阀门市场就发现了许多企业为盈利以次充好，严重的扰乱了阀门市场。阀门市场主要存在的问题为：一、部分经营者购买无厂名厂址的，打印知名厂家的名牌及合格证，对合格阀门企业的声誉造成严重危害。二、翻新阀门，部分经营者通过对废旧阀门重新油漆后第二次销售，给工程质量带来严重的安全隐患。　　　　随着石油开发向内地油田和海上油田的转移，以及电力工业由30万千瓦以下的火电向30万千瓦以上的火电及水电和核电发展，也应依据设备应用领域变化相应改变其性能及参数。城建系统一般采用大量低压阀门，并且向环保型和节能型发展，即由过去使用的低压铁制闸阀逐步转向环保型的胶板阀、平衡阀、金属密封蝶阀及中线密封蝶阀过渡。输油、输气工程向管道化方向发展。从节约能源方面看，要发展蒸汽疏水阀，并向亚临界和超临界的高参数发展。　　　　电站的建设向大型化发展，所以需用大口径及高压的和，同时也需用快速启闭阀门。成套工程的需要，由单一品种向多品种和多规格发展。一个工程项目所需的阀门，由一家阀门生产厂家全部提供的趋势越来越大。　

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