智能水表增加的阀门，设计采用的结构形式多样，有先导阀门、球阀、陶瓷阀、机械阀等等。
The added valves of intelligent water meter are designed in various forms, such as pilot valves, ball valves, ceramic valves, mechanical valves and so on.
1、先导阀
1. Pilot Valve
先导阀应该说是利用了一种巧力，也就是四两拨千斤的原理。利用开启一个小孔，将上端和下端的水压进行调整。当水压平衡时，阀门就会自动开启，当水压不平衡时阀门就会自动关闭。先导阀顾名思义就是先导通一个小孔，利用很小的力，然后在将阀门开启。应该说先导阀是智能水表其中一种比较理想的设计。因为开启阀门和关闭阀门需要的时间很短，甚至是一瞬间的事情。而水压对阀门是乎没有太大的影响，因为，先导阀本身就是依靠水压差来达到开启阀门和关闭阀门的。假如采用电磁阀作为驱动，则开启和关闭阀门所需要的功率几乎是恒定的。
Pilot valve should be said to use a kind of ingenuity, that is, the principle of four or two kilograms. By opening a small hole, the water pressure at the upper and lower ends is adjusted. When the water pressure is balanced, the valve opens automatically and closes automatically when the water pressure is unbalanced. Pilot valve, as its name implies, is to lead through a small hole, use very little force, and then open the valve. It should be said that pilot valve is one of the ideal design of intelligent water meter. Because it takes only a short time to open and close the valve, even for a moment. The water pressure has little effect on the valve, because the pilot valve itself relies on the water pressure difference to open and close the valve. If solenoid valve is used as drive, the power required to open and close the valve is almost constant.
2、球阀
2. Ball valve
球阀是自来水管道常用的一种手动阀门，由于是采用手动的，所以，在使用中其密封性能还是可以。但是一旦采用到智能水表上，这个阀门的工艺要求就提高了很多。
Ball valve is a kind of manual valve commonly used in tap water pipeline. Because it is manual, its sealing performance can still be used. But once the intelligent water meter is used, the technological requirements of the valve will be greatly improved.
3、陶瓷阀
3. Ceramic Valve
陶瓷阀是在手动冷热水阀门的基础上提升为智能水表阀门的一种结构，从原理上来说应该是完全可行的，只需解决压力损失的技术问题，所以设计体积就较球阀要大多了。但是水压几乎对陶瓷阀的影响力很小，因为陶瓷阀是两个陶瓷片，其中一个陶瓷片做旋转运动，那么它克服的仅仅是两个陶瓷片之间的摩擦力。所以，陶瓷阀是智能水表其中一种理想的设计结构。
Ceramic valve is a kind of structure which is lifted to intelligent water meter valve on the basis of manual cold and hot water valve. It should be completely feasible in principle. It only needs to solve the technical problem of pressure loss, so the design volume is much larger than that of ball valve. But water pressure has little influence on ceramic valves, because ceramic valves are two ceramic plates, one of which rotates, so it only overcomes the friction between the two ceramic plates. Therefore, ceramic valve is an ideal design structure of intelligent water meter.
4、机械阀
4. Mechanical Valves
机械阀是在陶瓷阀的基础上，在阀门的密封处增加了机械密封装置，彻底解决了被驱动杆的密封问题。机械阀采用了机械密封原理的提升设计，将整个阀门结构看成是一个机械密封装置，其中没有采用陶瓷材料，而是采用摩擦系数相对小的材料进行组合成阀门摩擦片。http://www.sdlyxqyb.com/
Mechanical valves are based on ceramic valves. Mechanical seals are added to the seals of the valves, which completely solves the sealing problem of the driven rod. Mechanical valves adopt the elevation design of mechanical seal principle, which regards the whole valve structure as a mechanical seal device, in which ceramic material is not used, but the material with relatively small friction coefficient is used to assemble the valve friction disc. Http://www.sdlyxqyb.com/
