1. 天津压力开关和压力变送器,孔板流量计的优缺点有哪些?
      信息来源: 华恒 | [ 2019-05-22] 点击量: 166


          What are the advantages and disadvantages of orifice flowmeter?The orifice plate flowmeter designed, manufactured and calibrated according to the national standard does not need real-flow calibration. It has high accuracy, simple structure and low manufacturing cost. However, the pressure loss is the largest in all standard throttling devices, and it is not suitable for situations requiring low pressure loss. The standard orifice plate is widely used in petroleum, chemical, metallurgical, power and other industries.
          The accuracy of flow rate measured by standard orifice flowmeter is not higher than that of other flowmeters.
          The accuracy of many flowmeters is not calibrated according to the actual flow, but indirectly determined by the design process and the mechanical manufacturing accuracy of products.
          Standard orifice plate has a long history of application. It has a set of internationally recognized standards and norms in design, manufacture, inspection and use. It has a place in the recommended tables of international trade measurement. This may be the reason why some people think it is more accurate than other flowmeters.
          In fact, there are many flowmeters with much higher accuracy than orifice plates, because they have not entered the "eyes" of the International Metrology Organization because of their short application occasions and time, which does not mean that they are inferior to orifice plates.
          However, the standard orifice plate is indeed an excellent flow measurement tool.
      PS: What are the advantages and disadvantages of Tianjin pressure switch and pressure transmitter and orifice flowmeter?