Application composition of differential pressure flowmeter
The differential pressure flowmeter consists of a primary device (detection piece) and a secondary device (differential pressure converter and flow display instrument). Differential pressure flowmeters are usually classified in the form of detection parts, such as orifice flowmeters, Venturi flowmeters, average velocity tube flowmeters, Pitot tube principle type-Bitoba flowmeters, etc.
The secondary devices are various mechanical, electronic, electromechanical integrated differential pressure gauges, differential pressure transmitters and flow display instruments. It has developed into a large class of instruments with a high degree of three modernizations (serialization, generalization and standardization) and a large variety of specifications. It can measure flow parameters and other parameters (such as pressure, level, density, etc.) ).
The detection parts of the differential pressure flowmeter can be divided into several categories according to their working principles: throttling device, hydraulic resistance type, centrifugal type, dynamic pressure head type, dynamic pressure head gain type and jet type.
Test pieces can be divided into two categories according to their degree of standardization: standard and non-standard.
The so-called standard detection part is designed, manufactured, installed and used according to the standard documents, and its flow value and estimated measurement error can be determined without actual flow calibration.
Non-standard test pieces are less mature and have not yet been included in international standards.
