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technical article
Principle and characteristics of integrated orifice plate flowmeter
2012-1-20 9:44:13

特点: Features of integrated orifice flowmeter :

1. The structure of the throttling device is easy to replicate, simple, sturdy, stable and reliable performance, long service life and low price.


2. Orifice plate calculation adopts international standards and processing

3. Wide application range, all single-phase flows can be measured, and some mixed-phase flows can also be applied.


4. The standard throttling device can be put into use without actual flow calibration.

5, integrated orifice plate installation is simpler, without the need for a pressure tube, can directly connect differential pressure transmitters and pressure transmitters.

6.Imported monocrystalline silicon intelligent differential pressure sensor


7, high precision, perfect self-diagnostic function


8. The range of the smart orifice plate flowmeter can be adjusted by programming.

9, can display cumulative flow, instantaneous flow, pressure, temperature.


10. In addition to online and dynamic full compensation functions, it also has self-diagnosis and self-setting range.

11. Equipped with multiple communication interfaces


12.High stability


13. Wide measuring range, greater than 10: 1

Scope of application:


1.Nominal diameter: 15 mm ≤DN≤1200mm


2. Nominal pressure: PN≤10MPa


3. Working temperature: -50 ℃ ≤t≤550 ℃


4. Range ratio: 1:10, 1:15


5. Accuracy: 0.5 level, 1 level


是将标准孔板与差压变送器(或差压变送器、温度变送器及压力变送器)配套组成的高量程比差压流量装置,可测量气体、蒸汽、 DEC-LG integrated orifice plate flowmeter is a high-range specific differential pressure flow device which is composed of a standard orifice plate and a differential pressure transmitter (or differential pressure transmitter, temperature transmitter and pressure transmitter). Measuring gas, steam,

The flow of liquid and natural gas is widely used in process control and measurement in the fields of petroleum, chemical industry, metallurgy, electric power, heating, water supply and other fields.

安装注意事项 Installation Notes for Integrated Orifice Flowmeter


Installation of integrated orifice plate flowmeter


1. It can be installed horizontally, vertically or obliquely. The tube should be filled with liquid.


2. The front and rear straight pipe sections of the throttling device should be straight, without visible bends, and should be "round". The inner wall should be clean and free of pits and sediment.


3. The length requirements of straight pipe sections and the installation of throttling devices shall comply with the relevant regulations of GB / T26224-93.


4. The installation of impulse piping shall comply with the specifications stipulated in the standards.

The working principle of the integrated orifice plate flowmeter The fluid filled with the pipe flows through the throttling device in the pipeline, which causes local contraction near the throttle, the flow velocity increases, and a static pressure difference occurs on the upper and downstream sides.


Under the conditions of known parameters, the relationship between differential pressure and flow can be derived from the principle of flow continuity and Bernoulli's equation to obtain the flow.

Integrated orifice plate flowmeter structure

节流装置组成 Composition of throttling device of integrated orifice plate flowmeter


Throttle parts: standard orifice plate, standard nozzle, long diameter nozzle, 1/4 round orifice plate, double orifice plate, eccentric orifice plate, round orifice plate, tapered inlet orifice plate, etc. Flange, clamping ring, pressure tube, etc.


Connecting flanges (national standards, various standards and flanges of other design departments), fasteners.