- The special structure of the ring-shaped orifice plate "peripheral circulation, middle blocking" makes the impurity unimpeded and the condensed water formed by the steam flow away in time when the steam is stopped, thus improving the working reliability and measurement accuracy.

- Suitable for flow measurement of high temperature and high pressure fluids. When the annular orifice measures high-temperature fluid, the periphery of the flow measuring plate is in a free state, and the temperature expansion only changes the outer dimension, but does not change the sharpness and shape of the edge, so the outflow coefficient does not change, and the measurement accuracy is not affected.

- Compared with round orifice plate and eccentric orifice plate, it works more reliably and measures more accurately. Using the annular orifice plate to measure the fluid flow, it is not easy to block the pressure-taking hole. Because of the simple geometric shape, it can be precisely processed and assembled, and the measurement accuracy can be easily improved.