First, the valve in the IC card water meter should have the performance IC card water meter is a measurement and control functions as one of the water measuring instruments, as a measuring device it provides the number of water and charging basis; as a control device, it can achieve prepaid Function and accurate control of water supply. The valve is the executive terminal of its control device, high quality IC card water meter valve should have the following properties: 1, the valve switch should be flexible and reliable. Fight open, closed strict, accurate in place, and open, off the state should be stable. 2, according to national standards, the total length of the IC card water meter structure can not exceed the length of the same nominal diameter base table, so the valve should be small and compact. 3, the pressure loss should be as small as possible, small diameter IC card water meter its base table plus the total pressure loss valve should be less than 0.1MPa. 4, from the power requirements, the valve starting and running torque should be as small as possible. 5, the valve compressive strength should be reached under the pressure of 1.6MPa for 15min (type test for 2.0min at 1min) no leakage and no deformation of the valve body, damage. 6, valve sealing performance is good. Under 1.1PN, the sealing surface must not leak. 7, opening and closing speed as fast as possible, and no water hammer phenomenon. 8, according to CJ / T133 standards, the number of valve opening and closing should be more than 1,000 times this time the valve closed after the discharge can not exceed the standard requirements, the valve life should be more than 10 years. 9, the valve operating margin should be as large as possible, the pipeline pressure to 0.02Mpa its rated pressure, should be able to work properly. 10, the valve material used should be corrosion-resistant, and in line with drinking water sanitation. Second, the valve selection requirements 1, IC card water meter valve problems in our country IC card water meter put on the market for nearly 10 years, for the water industry from the traditional man-made fee management mode to prepaid management provides the material conditions to achieve The city safe, reliable, accurate and convenient water fee system. Therefore IC card water meter by tap water industry and users of all ages. But this high-tech product development was not always smooth, many manufacturers see the water meter IC card market is vast, lucrative, although not mastered the technology of this product, but hastily launched; some IC card water meter manufacturers being driven by the interests, not attention to product quality, did not fully consider the reliability of the product design, design requirements are unclear, inadequate design; strictly control the production process, testing, testing means lacking, resulting in poor product quality, resulting in IC card water meter on the market quality varies greatly. According to our market survey, the IC card water meter appears to occupy a larger proportion of the valve failure, the main failure of the internal leakage, can not open, can not get stuck or stuck, etc., which can not be opened, the closure is not very serious Failure, a direct impact on the user's use, so that the meter loses its most basic use of functions.
Vegetable Mesh Bags
Vegetable Mesh Bags are reusable bags made of mesh fabric that are used for storing and carrying fruits and vegetables. They are designed to keep produce fresh, prevent bruising, and allow air to circulate around the produce.
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