Valves are found in virtually every industrial process, including water and sewage processing, mining, power generation, processing of oil, gas and petroleum, food manufacturing, chemical and plastic manufacturing and many other fields. Valves Stop Valves, Ball Cock, Angle Valves, Gate Valves, Check Valves ZHEJIANG KINGSIR VALVE CO., LTD. , http://www.kingsirvalve.com
People in developed nations use valves in their daily lives, including plumbing valves, such as taps for tap water, gas control valves on cookers, small valves fitted to washing machines and dishwashers, safety devices fitted to hot water systems, and poppet valves in car engines.
In nature there are valves, for example one-way valves in veins controlling the blood circulation, and heart valves controlling the flow of blood in the chambers of the heart and maintaining the correct pumping action.
Valves may be operated manually, either by a handle, lever, pedal or wheel. Valves may also be automatic, driven by changes in pressure, temperature, or flow. These changes may act upon a diaphragm or a piston which in turn activates the valve, examples of this type of valve found commonly are safety valves fitted to hot water systems or boilers.
More complex control systems using valves requiring automatic control based on an external input (i.e., regulating flow through a pipe to a changing set point) require an actuator. An actuator will stroke the valve depending on its input and set-up, allowing the valve to be positioned accurately, and allowing control over a variety of requirements.
LED lighting equipment market ushered in a recovery situation
In 2014, benefiting from the strong trend of downstream lighting, the LED industry chain will be transmitted to the equipment manufacturers. With the active expansion of lighting and packaging manufacturers, the operating rate is almost full, packaging, lighting, testing and MOCVD equipment manufacturers ushered in a new round of growth after the downturn. CSAResearch data shows that in 2013, the investment in the LED industry, industry supporting (substrate, equipment) accounted for 47.4 of total investment, R & D and testing investment accounted for 1.6. The industry also generally believes that domestically produced equipment will further enhance market share in 2014 rate. Detection of new growth points In the current price competition, improving product yield has become the key to the company's net profit growth, and the demand for enterprises to improve product yield is also increasing. As a result, the online inspection equipment in the lighting process in 2014 is comprehensive. Spread out. Guo Zhijun, director of the customer center of Hangzhou Yuanfang Optoelectronic Information Co., Ltd. said that from the feedback of customers, the previous products were sampled, but now the full inspection can be achieved. The unqualified products will not leave the factory at all. The enterprises that used the full inspection equipment have already tasted it. When it comes to sweetness, the whole inspection must be a big trend. It is reported that in addition to testing whether the lamps can be illuminated, the performance indicators such as light efficiency, color rendering index, spectrum and electrical parameters can be completed through online testing, and as a final inspection link, directly into the packaging. Guo Zhijun introduced that Xiamen Lidaxin Optoelectronics Co., Ltd. and Zhejiang Shenghui Lighting Co., Ltd. (CSAResearch and China Customs Data Display), which are among the top domestic exporters, have fully used the full inspection equipment. The main reason is still the quality requirements of foreign markets. Strict, and full inspection can ensure that the product quality meets the requirements at least at the factory. Some insiders said that after the previous stage of the survival of the fittest, the LED industry will gradually mature and rational from the previous price, and the quality products will be welcomed by the market. Under this environment, the full inspection equipment will be sought after by lighting manufacturers and become a new equipment enterprise. Performance growth point. In addition to the online inspection of downstream lighting fixtures, the packaging process is also being automated from stand-alone automation to full-line automation, reducing the cost of manual work and personnel, as well as human-induced quality hazards. According to the development experience of the semiconductor industry, unmanned operation is an inevitable trend of development, and unattended at the production site, and LED products will follow this rule due to the characteristics of their semiconductor devices. Wenshi, executive deputy director of Hangzhou Zhongwei Optoelectronic Technology Co., Ltd., said that since the whole line of automation should be customized according to the special needs of enterprises, the price is higher, and Ruifeng Optoelectronics, Hongli Optoelectronics, Guoxing Optoelectronics, and Chang Listed companies such as Fangfang have taken the lead in customizing and using automatic connection systems, and the production capacity is expected to be further improved. According to equipment manufacturers, the current production orders have already been filled. Due to the high concentration of orders, the delivery pressure is very high, and equipment manufacturers have gradually stepped out of the previous downturn. There is no reason to reduce the price of production equipment orders, in addition to the downstream pulling action, as well as the level of equipment localization. However, according to the reporter's understanding of domestic first-line packaging companies such as Mulinsen, Jufei, and Dinghui executives, although the company has gradually recognized localized equipment, it is still mainly for the latter stage processing such as splitter and braiding machine; Due to the more complicated processing technology and the higher performance requirements, the solid crystal machine and wire bonding machine still occupy a large market share. Li Jiansheng, chairman of Shanghai Dinghui Technology Co., Ltd., said that because solid crystal machines and wire bonding machines have a decisive influence on device quality, many companies still choose foreign brands more conservatively. Although the price of domestically produced equipment is currently competitive, the price of some products is even cheaper than that of foreign brands. However, He Yunbo, deputy general manager of Dazu Laser Equipment Co., Ltd., said that most companies are still at a loss stage, and the price of equipment and LED devices. The trend is not exactly the same. Due to the decline in the price of chips and components, the price of LED devices has been decreasing; but the production equipment has matured due to the development of its technology, process and materials, and the price is very transparent and stable. Therefore, the current profit of domestic equipment enterprises is only 10~ 20, some companies even have no profit, the equipment price has almost no room to fall. He Yunbo admits that the order quantity will also test the manufacturer's production delivery ability and quality management ability. Under the pressure of production orders and the pressure of the capital chain, there will be some small scale, R&D and production capacity in this round of competition. Lower companies are eliminated. In the face of internal and external pressures, if domestic equipment companies want to further increase their market share, the key is to improve equipment performance and help middle and downstream manufacturers to increase production capacity and yield, which is the key to the success of packaging and lighting companies. According to several companies, in mid-2014, March and April were the largest orders for equipment. The order volume in June has slowed down, so how much downstream can be pulled and how long it can last. The industry has not yet predicted, but nothing. The question is that domestic packaging and lighting equipment have already occupied a place in the industry.