? ☆ Tunchang large caliber water meter № the Tunchang large caliber water offer the Tunchang № large caliber water meter price ★ 
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 The Tunchang large caliber water ☆: 
 R & D production the Tunchang large caliber water meter, the RF card as media in the form of an induction of a variety of information entered into the the Tunchang large caliber water control CPU, Tunchang large caliber water meter of water purchased by the user automatically open the valve the water supply, when the remaining amount of water to less than 5m3 (including 5m3) but have not yet exhausted, and every integer (for example, the remaining water to 4m3, 3m3, 2m3, 1m3) the Tunchang large caliber water will automatically be within the electric valve is closed, Users only need to purchase water into the the Tunchang large caliber water write card "induction zone" to sense what you can to the Tunchang large caliber water electric valve re-open (ie Tunchang large-diameter water meter within the remaining water is less than 5m3 to exhaustion this time, the the Tunchang large caliber water five times without water way to remind users to purchase water). Not to purchase water to the the Tunchang the remaining amount of water within the large diameter water meter is exhausted, and write within the the Tunchang large caliber water meter, electric valve will close, and until the purchase of water and write Tunchang large caliber water meter inside so far. In order to achieve the first to buy the water, the purpose of water ". 
 ? When the Tunchang large caliber water in the remaining water exhausted and electric valve is closed, for some reason (such as electric valve internal leakage, etc.) when the flow through the the Tunchang large caliber water, the Tunchang large caliber water will proceed measurement, the number counted as a negative value, when the user re-purchase of water and write the Tunchang large caliber water, the the Tunchang large diameter water meter will first be deducted the negative values ??(ie, the first overdevelopment of water), if the new write water enough deductible super negative values ??of the water is the Tunchang large caliber water electric valve to open and continue to be closed until the remaining water in the large-diameter water meter within the Tunchang positive so far. When the Company suffered such as magnetic and other external attacks, within one minute inside the electric valve shut down. At this point, the user can purchase water card to (sensing area) induction, you can own the electric valve to open and Tunchang large diameter water meter work properly. However, if such an attack accumulated more than 10 times more users to purchase water card will no longer be able to open its electric valve (in case the user man-made attack), high a check card (water management The department only holds) to the electric valve is opened, the same time attack record clear (after the user configuration of the water cards but also because of the attack and then open the 10th). Enabling it to achieve self-lifting of the ability to attack the Tunchang large caliber water, but also limited so that it can not be infinitely of Tunchang large caliber water attack human behavior. The Company produced than other Tunchang large caliber water meter for each multi-presented two of the company's trademark and warnings tamper shrink film, installation, pre-set into to take over, will Tunchang large-diameter water meter installed and leak testing after passing tamper shrink film set in the Tunchang large caliber water to take over the nut, and then use a hair dryer (1600w fever hair dryer) alignment tamper shrink film at blowing or Pour hot water above 90 ℃ alignment tamper shrink film, shrink film, shrink to take over the shape of the nut to tight coupling. To split the table must be tamper destruction of heat shrinkable film, thus preventing the artificially split the table for the purpose of stealing water. In addition to the above characteristics, the product, the following characteristics: (a) non-contact (RF card) information carriers, electronic wear, fast transmission of information, confidentiality and anti-attack performance, high reliability; (b) with LCD display the total quantities of water purchased, and the remaining water and all kinds of information; when the remaining water is zero or alarm value, automatically close the valve without water; d the entire system is usually in the off state, static power consumption is zero; (e) electric control valve patented electric valve to completely overcome the electromagnetic valve interference and shutdown lax defects; f unique anti-theft of water, tamper table, anti-reversal device; g measurement display using electronic and LCD Dual Display , which does not affect the accuracy of the test and verification of the Tunchang large caliber water; h. overall closed-shell design, anti-attack, waterproof, moisture, fumes, anti-knocking; i the sale of water to read and write card machine can separate use, but also with computer networking. The company produces technical parameters are as follows: Working power supply: two 3.6V lithium battery, the working life of 8-10 years; (b) usually work current: 0A; c instantaneous operating current :1-5MA; d. RF card Life time:> 100 000; (e) Working pressure: 1MPa below normal work; (f) the operating temperature range (temperature) :0.3-40 ° C; g. the whole life of 8-10 years. This product meets the the GB GB/T778-1996 cold water Tunchang large caliber water meter and line marked CJ/T133-2006 the Tunchang large caliber water standard. 
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 ? A, Hui Yi brand the Tunchang a large caliber water meter Introduction Tunchang large diameter water meter is defective development of recent years the ordinary Tunchang large caliber water meter in the small flows (less than 8L / H) measured up. Ordinary Tunchang large caliber water meter due to movement of the rotating parts and count the gear inertia, and therefore in the measurement process if the water flow to a certain extent will not be able to promote the movement of the impeller and counter gear, to the small flow can not be measurement, people can be less than the starting flow of this drip, so that the Tunchang large caliber water meter is not metering access to the water tube online, so that the water supply enterprises suffered losses. To solve this problem, Beijing Hui Yi has developed a differential pressure integral anti-drip Tunchang large diameter water meter, it simply is not to change the the Tunchang large caliber water movement in advance, the drop out of the water in drip first accumulate when save a certain amount of a sudden promote the Tunchang large caliber water impeller rotation drip measurement purposes 
 ? Second, the product uses and characteristics: This series of the Tunchang large caliber water meter for the total amount of the high sensitivity to flows through the tube drinking water, its main features are as follows: 1, the smaller the initial flow rate, the initial flow rate is less than 0.5 L / h; 16 times more than the ordinary the Tunchang large caliber water meter; 2, adaptability to water quality: due to the drainage channel between the anti-drip institutions and outlet distance of 4mm, so by particles below 4mm, so that the anti-drip institutions will not be blocked or stuck in the impurities in the water; 3, anti-slip performance: ordinary movement velocity, not idling, soft diaphragm can offset part of the water hammer pressure, coupled with anti-drip institutions closed, so its anti-creep performance is far superior to the jet and the C-class anti-drip the Tunchang large caliber water; 4, in the 0.5L / h to 14L / h under the micro-flow state for the intermittent measurement (like displacement Tunchang caliber water), and micro-flow range measurement error is small; 5, of the authority of experts convened by the Ministry of Construction and Water Association to identify the products and technologies, and its technology has reached domestic leading level. Can guarantee the normal work for more than 10 years of anti-drip institutions. Conditions of use: the work of the water temperature does not exceed 40 ℃, working pressure is not greater than 1Mpa. Four, show error: less than the minimum flow (Qmin) of the trace does not count; from including minimum flow (Qmin) to but excluding the boundaries of flow (Qt) of low district: ± 5%; from including the boundaries of flow (the Qt) to include overload In the upper zone of the flow (Qmax): ± 2%. Pressure loss: △ ≤ 0.1Mpa 
 ? All the members of the Beijing Hui Yi Tunchang caliber water meter Co., Ltd. sincerely welcome you to Beijing Hui Yi Tunchang caliber water plant guide inspection 
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