The basic principles and standards outlined annular orifice plates are basically the same, but the structure is very different. Annular orifice itself comes with some measuring tube, in the middle of the measuring tube fixed a coaxial circular plate, circular plate fixed to the pipe by a support frame, for a variety of measurements of the fluid medium (gas, vapor, liquid), such as saturated steam, superheated steam, compressed air, various gas, exhaust gas, cooling water, fuel oil, residual oil, fuel oil, condensate, various chemical solutions and the like. Annular orifice has a simple standard orifice structure, strong, easy to install features, while eliminating the need long straight pipe, has an advantage in the harsh conditions of work in the pipeline. Working principle is based on the basic principle of the annular orifice with the standard orifice, as applied to the fluid continuity equation and Bernoulli's equation, the difference is that after the fluid into the measuring pipe, the smallest flow cross-section is not the same, the standard orifice flow cross-section is the smallest circle shaped, circular orifice flow cross-section is the smallest ring, the annular flow area equivalent to a circular flow cross-section, the equivalent pore diameter d, equivalent aperture ratio β = d / D, the basic equation is: Qm = 0.12643 Qm: flowing fluid flow measuring tube (kg / h) ε: the stream expansion coefficient of incompressible fluid ε = 1 D: the inner diameter of the measuring tube (mm) C: the discharge coefficient ρ: density of the fluid in the working state (kg / m3) ΔP: pressure difference (kPa) features 1, for the measurement of steam, gas and cooling water and other dirty media. Annular orifice "peripheral circulation, in the middle block," the special structure, such impurities and smooth stopping the steam condensate formed in the steam flow away in time, thereby improving the reliability and accuracy. 2, suitable for high temperature, high pressure fluid flow measurement. When the annular orifice measuring temperature fluid, the measured flow plate periphery in a free state, the thermal expansion only change dimensions, without changing the shape of the edge sharpness and therefore does not change the discharge coefficient, does not affect measurement accuracy; when measuring high-pressure fluid, due to flow measurement plate inside the pipe, regardless of the magnitude of the static pressure, reduce processing costs. 3, compared with round orifice, eccentric orifice reliable, accurate measurement. 4, using the equalizing ring structure, reduce measurement error sources. 5, using differential pressure transmitter with remote membrane cartridge, you can measure the flow of residue, heavy oil and other dirty media. Scope 1, nominal diameter: 50mm≤DN≤1800mm 2, the Reynolds number range: 103≤ReD≤107 3, PN: PN≤32MPa 4, Working temperature: -196 ~ 530 ℃ 5, Accuracy: 1, 1.5 ?? * For more product information, visit the company's Web site. http://www.kyjlyb.com/ ?? Business Consulting:? Miss Song ?? Contact:??? ???? 0317-8266455 E-mail:?? 2842911836@qq.com ???? ?? Technical Advisory :? 13082172588 Fax: 0317--8290179