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水表在水流量计量中由于结构简单、性能可靠、维修方便而被广泛采用。目前国内生产的水表按其用途可分为冷水表和热水表。冷水表一般用来计量0～+40℃的水,热水表计量+50～90℃的水。按其结构又可分为旋翼式水表和水平螺翼式水表。旋翼式水表量程范围较宽,对较小流量计量精度高,但水头损失大,中口径的体积大。水平螺翼式水表正相反,对小流量计量精度差,量程范围稍窄,但流通能力大,水头损失小,体积小。若按水表计数器的型式亦可分为湿式水表和干式水表。湿式水表
Water meter in the water flow measurement due to simple structure, reliable performance, easy maintenance and is widely used. At present, the domestic production of water meters can be divided according to their use of cold water meter and hot water meter. Commonly used to measure cold water meter 0 ~ +40 ℃ water, hot water meter measurement +50 ~ 90 ℃ water. According to its structure can be divided into rotor-type water level and horizontal screw-wing meter. Wide range of rotor-type water meter, small flow measurement accuracy, but the head loss, the caliber of the large. Horizontal screw-wing meter is the opposite, poor accuracy of small flow measurement, the range of a little narrow, but the flow of capacity, head loss, small size. If the type of meter counter can be divided into wet and dry water meters. Wet water meter