The orifice plate flowmeter is one of the oldest types of flowmeters. They measure the flow rate, volume, and density of liquids. However, this type of flowmeter can be inaccurate in low flow conditions. Other disadvantages include low turndown and high pressure loss. Regardless of the type of flow meter you choose, it is important to consider all the pros and cons.
An orifice plate flowmeter with a linearly extending section is an inexpensive flow meter. It is designed to measure flow rates in piped systems. The flow rate is determined by the differential pressure across the orifice plate and the float's position in the tube. Flowrates are normally measured in m3/h.
The orifice plate is usually fitted on the downstream side of the pipework, and is therefore able to measure the flow rate. There are various types of plate holders available, such as the single chamber plate carrier. The ss ratio of the orifice plate to the pipe diameter is typically 0.7.
The pressure balance across the surface area of the orifice plate reduces the risk of chaotic and random eddy formations, which can degrade the accuracy of measurements. By balancing the flow with respect to the process variable, this type of flowmeter improves the accuracy and repeatability of measurements and minimizes the measurement costs.