ACF-1KB series orifice flow meter has simple structure, no moving parts, stable and reliable with high precision. High degree of standardization and good linearity make it no need for real – flow calibration. Orifice flow meter is flexible and convenient to use. The differential pressure flow meter is still widely used in current domestic flow measurement, maybe 75%-85% of the total flow meter consumption according to the estimated information. It is widely used in steam boiler, petroleum, chemical industry, steel, electric power, water conservancy, papermaking, pharmaceutical, food and chemical fiber industries.