Orifice plate flowmeter
  • Orifice plate flowmeter

Orifice plate flowmeter

The LGK series orifice plate flowmeter is a high range differential pressure flow device composed of a standard orifice plate and a multi parameter differential pressure transmitter (or differential pressure transmitter, temperature transmitter, and pressure transmitter).

1、 Product Overview:

The LGK series orifice plate flowmeter is a high range differential pressure flow device composed of a standard orifice plate and a multi parameter differential pressure transmitter (or differential pressure transmitter, temperature transmitter, and pressure transmitter). It can measure gas, steam, liquid, and induced flow rates and is widely used in process control and measurement in fields such as petroleum, chemical industry, metallurgy, power, heating, and water supply. A throttling device, also known as a differential pressure flowmeter, is widely used in gas applications, consisting of a primary detection component (throttling component) and a secondary device (differential pressure transmitter and flow display instrument). Measurement of steam and liquid flow rates. It has a simple structure, convenient maintenance, and stable performance.

2、 Working principle:

The LGK series orifice flowmeter is a type of flow meter that, when filled with fluid in a pipeline, passes through the flow orifice plate inside the pipeline. The flow velocity will form a local contraction at the throttling point of the flow orifice plate, thereby accelerating the flow velocity and reducing the static pressure. As a result, a pressure drop or pressure difference occurs before and after the standard orifice plate. The larger the flow rate of the medium, the greater the pressure difference generated before and after the flow orifice plate. Therefore, the magnitude of fluid flow can be measured by measuring the pressure difference. This measurement method is based on the principles of the continuity of flow equation (law of mass conservation) and Bernoulli equation (law of energy conservation). Given the relevant parameters, the relationship between differential pressure and flow rate can be derived based on the principle of flow continuity and the Bernoulli equation to obtain the flow rate.

3、 Application scenarios:

The LGK series orifice plate flowmeter is a high range differential pressure flow device composed of a standard orifice plate and a multi parameter differential pressure transmitter (or differential pressure transmitter, temperature transmitter, and pressure transmitter). It can measure the flow rate of gas, steam, liquid, and natural gas, and is widely used in process control and measurement in fields such as petroleum, chemical, metallurgical, power, heating, and water supply.

4、 Main features:

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

2. The calculation of orifice plates adopts international standards and processing.

3. Widely applicable, all single-phase flows can be measured, and some mixed phase flows can also be applied.

4. The standard throttling device does not require actual flow calibration and can be put into use.

5. The installation of the integrated orifice plate is simpler, without the need for a pressure pipe, and can be directly connected to differential pressure transmitters and pressure transmitters.

5、 Technical parameters:

Caliber: DN25~DN1000 (mm);

Accuracy: ± 1% FS;

Range ratio: standard 1:13, extended 1:30;

Working pressure: ≤ 42.0MPa;

Medium temperature: -40C~450C;

Medium viscosity: ≤ 30CP (equivalent to heavy oil);

β value: 0.2-0.8;

Connection method: flange or clamp type;

Flange standard:

DN≤600mm, PN2.0~PN26,HG20616;PN32,HG20618;

DN>600mm,PN2.0~PN15,HG20623;

It can also be manufactured according to the flange standards provided by the user;

Material: main body, orifice plate, pressure tube, three valve group: stainless steel; Straight pipe section and connecting flange: carbon steel or stainless steel;

Installation method: horizontal or vertical;

Intelligent differential pressure transmitter: output: 4-20mA DC or digital signal; Power supply: 24V DC;

Explosion proof level: d Ⅱ CT5.6, ia Ⅱ CT4-6; Protection level: IP67;

Meter header: There are two types: blind meter and digital meter.