The orifice flowmeter is the best differential pressure flowmeter at present. It has the characteristics of complex and firm structure, easy to replicate, stable and reliable performance, and expensive. It is widely used in industrial process control and flow monitoring. Although it has many advantages, it sometimes has problems. The following small series will introduce the problems that exist in the actual use of orifice flowmeters.1. The amplitude should be small but not large. The best turndown ratio of the orifice flowmeter is less than 4:1, adopting temperature and pressure compensation technology, the maximum turndown ratio can reach 8:1. When this range is exceeded, the orifice flowmeter is no longer applicable. At this time, a flowmeter with a larger range should be selected. In actual work, large, medium, small and multi-level fires often occur in equipment such as direct-fired engines and boilers. On the one hand, the design must ensure the maximum air consumption, and on the other hand, it must meet the accuracy requirements under the minimum flow rate, so it is best to use an orifice flowmeter to measure a piece of equipment;2. The pressure difference of the orifice flowmeter should be greater than or less than. It is best to use a large range of intelligent differential pressure transmitter;3. In the case of meeting the metering capacity, reduce the pipe diameter and increase the flow rate, so that the throttle can be used at a higher Reynolds number;4. Take the diameter ratio as small as possible, and try to control it between 0.3-0.5, so that the lower limit of the pressure difference becomes larger;5. Multi-tube parallel connection is used for measurement.Hope the above content is helpful to you. If you have any questions, please feel free to contact us.
Post time: 21-09-21