Throttling flowmeter is a typical differential pressure flowmeter, which is the most common instrument for measuring the total flow of steam, liquid and steam accurately in industrial production.In all industrial production industry, throttle flowmeter also accounts for about half of the number of instruments, so throttle flowmeter is widely used in the industrial production industry.Include liquid, gas vapor can be accurately measured, part of the miscible flow, such as gas solid, vapor liquid, liquid solid can also be used, the general process of pipe diameter, working attitude (working pressure and temperature) are available.

Advantages and disadvantages of throttle differential pressure flowmeter

As the most important branch of flowmeter, throttle device can be divided into standard throttle device and non-standard throttle device.Standard throttling devices are: standard orifice plate,ISA standard nozzle, long neck nozzle, classic venturi tube and venturi nozzle;Non-standard throttling devices include: annular orifice plate, quarter-round nozzle, quarter-round orifice plate, conical channel orifice plate, circular orifice plate, axial force orifice plate, two-way orifice plate, bottom pressure loss total flow tube, rectangular venturi tube, v-cone flowmeter, wedge flowmeter, hidden orifice plate, system orifice plate, etc.

At present, the throttling type and the dynamic head type are the most widely used in various types, and the throttling type test pieces are up to dozens of kinds.The dynamic head flowmeter with constant velocity means that there is a rapid development trend in recent years, which is the key type of plug-in flowmeter.The basic throttling device can be put into use without real flow correction and is unique in the flow meter.The scope is narrow because the differential pressure data signal is associated with a quadratic total flow, usually 3:1 or 4:1.The pressure pipeline between the test piece and the differential pressure digital display instrument is weak, which is easy to cause leakage, blockage, freezing cleaning, data signal loss frame and other common faults.

The repeatability and accuracy of accurate measurement are above medium in the flow meter, because of the hazards of many elements, it is difficult to improve the accuracy.In order to fill the defect of differential pressure flowmeter, some countermeasures are adopted, such as scope broadening, pressure loss reduction and precision improvement.On - the - spot installation standard is higher, such as the need for a longer connection distance (such as orifice plate sprinkler head, etc.), generally more difficult to consider.

The throttle flowmeter is simple in construction, convenient in installation, reliable in operation, low in cost, and with a certain degree of accuracy.Be able to consider the requirements of construction engineering survey.It also has a long application history, rich and colorful, reliable test data, and the design scheme has been standardized in production and processing.If the throttling flowmeter is manufactured according to the design standard, the total flow can be carried out within the known uncertainty range without specific calibration.

Shanghai porcelain city has a lot of technical accumulation, so it can also customize the flow meter according to customer requirements, the design department can interact within 3 weeks, which is even faster than the delivery of foreign standard flow meter.Major application areas include metrology, hydraulic or supervisory technology, filling, glue or the monitoring of mixing ratios in a variety of industrial sectors.Shanghai porcelain flow meters are used in plastics, polyurethane, chemical, pharmaceutical, paint and coatings, hydraulic and automotive processing plants and two-component processes worldwide.