It can not only measure the flow of general fluids, but also be applicable to fluids containing various impurities (such as dust, suspension, precipitation, etc.), such as various coal gas hot air, flue gas, natural gas, cooling circulating water, etc.
When measuring saturated steam and superheated steam, it can avoid the accumulation of condensed water formed by steam outage. When steam is delivered again, it can quickly enter accurate measurement. The other section of the instrument body has a straight measuring tube. During on-site installation, installation errors (such as eccentricity, sealing gaskets extending into the pipe) have almost no effect on the instrument measurement.
The "pressure equalizing ring" structure is adopted, and accurate measurement can still be performed when the straight pipe section is not long enough.
For example: downstream of a 90° elbow, a 2D length is sufficient before the meter; downstream of a 30° elbow, a 0.5D length is sufficient before the meter.
It adopts "welding method" connection, which is suitable for high temperature and high pressure fluid (such as superheated steam), with low cost, reliable operation and stable performance.
The "jacket insulation" structure is adopted, which is suitable for fluids that are easy to crystallize, easy to vaporize, etc. and need to be heated or cooled.
The minimum flow section of the annular orifice flowmeter is the circular hole in the center of the plate. When the fluid passes through the circular hole, the flow area suddenly contracts and accelerates to measure the flow rate. The minimum flow section of the annular orifice flowmeter is the ring formed by the outer edge of the plate and the inner wall of the tube. When the fluid passes through, it is accelerated due to the sudden contraction of the flow area. The boundary layer generated when the fluid bypasses the edge of the annular orifice will be cylindrical, and the principle of resistance to the fluid is similar. Therefore, the resistance coefficient of the annular orifice flowmeter to the fluid is relatively similar, which makes it possible for the two to have similar outflow coefficients.
