1、 Overview
MH- LGOrifice flowmeter is a differential pressure generating device for measuring flow rate, which can be used in conjunction with various differential pressure gauges or transmitters to measure the flow rate of various fluids in pipelines. With a long historical background and complete experimental data. Simple structure, no movable parts, stable and reliable long-term use, high precision. Has rich experience in design, manufacturing, and application. High degree of standardization, good linearity, and no need for real flow calibration. The orifice flowmeter has reliable experimental data and a comprehensive international and national standard GB2624-93. It has inherent huge markets both domestically and internationally, with familiar users and comprehensive data; Following international standards for calculation, processing, and flexible and convenient use; Currently, differential pressure flow meters are widely used in flow measurement in China, accounting for an estimated 75% -85% of the total usage of flow meters according to relevant data. It is widely used in industries such as steam boilers, petroleum, chemical, steel, electricity, water conservancy, papermaking, pharmaceuticals, food, and chemical fibers.
When the fluid filled in the pipeline flows through the throttling device inside the pipeline, the flow beam will form a local contraction at the throttling element of the throttling device, thereby increasing the flow velocity and lowering the static pressure. As a result, a pressure drop, or pressure difference, is generated before and after the throttling element. The larger the flow rate of the medium, the greater the pressure difference generated before and after the throttling element. Therefore, orifice flow meters can measure the size of fluid flow by measuring the pressure difference. This measurement method is based on the laws of energy conservation and flow continuity.
The intelligent throttling device (orifice flowmeter) is a new generation flowmeter that integrates flow rate, temperature, and pressure detection functions, and can automatically compensate for temperature and pressure. The orifice flowmeter adopts advanced microcomputer technology and micro power consumption new technology, with strong functions, compact structure, simple operation, and convenient use.
2、 Characteristics
The structure of the orifice flowmeter throttling device is easy to replicate, simple and sturdy, with stable and reliable performance, long service life, and low price.
The calculation of orifice plate adopts international standards and processing
Orifice flow meters have a wide range of applications, and can measure all single-phase flows, as well as some mixed phase flows.
The standard throttling device does not require real flow calibration and can be put into use.
The installation of an integrated orifice flowmeter is simpler, without the need for a pressure pipe, and can be directly connected to differential pressure transmitters and pressure transmitters.
Characteristics of intelligent orifice flowmeter
Adopting imported monocrystalline silicon intelligent differential pressure sensor
High precision, comprehensive self diagnostic function
Intelligent orifice flowmeter has a range that can be self programmed and adjusted.
The intelligent orifice flowmeter can simultaneously display cumulative flow rate, instantaneous flow rate, pressure, and temperature.
In addition to online and dynamic full compensation functions, the intelligent orifice flowmeter also has self diagnosis and self setting range.
Equipped with multiple communication interfaces
High stability
Wide range, greater than 10:1
Technical specifications of intelligent orifice flowmeter
High precision: ± 0.075%
High stability: better than 0.1% FS/year
High static pressure: 40MPa
Continuous work for 5 years without calibration required
Negligible effects of temperature and static pressure
Anti high overvoltage

Main technical parameters

Nominal diameter: DN20-DN1000

Design and manufacture according to the national standard GB/T2624-93

According to the national verification regulation JJG 640-94 for factory inspection

Basic accuracy: ± 0.5%, ± 1%, ± 1.5%

Flow range: ≥ 1:15

Nominal pressure: 0.6, 1.0, 1.6, 2.5, 4.0, 6.4, 10 (MPa)

Tested media: saturated vapor, superheated vapor, water, air, natural gas, other mixed media

Temperature of the tested medium: -10 ℃~+450 ℃

Power supply: XSJ intelligent flow integrator 220VAC, flow transmitter 24VDC (powered by the integrator),

Output signal: 4-20mA DC or RS485 communication

Performance: intrinsic safety type ibIICT5

LGInstallation of flange pressure tapping orifice flowmeter

Can be installed horizontally and vertically, ensuring that the pipe is filled with liquid.

The front and rear straight pipe sections of the orifice flowmeter should be straight, without visible bending to the naked eye, and should be "round". The inner wall should be clean, without pits or sediment.

The length requirements of the straight pipe section and the installation of the throttling device shall comply with the relevant provisions of GB/T2624-93.

Please provide the following detailed data when placing an order:

(1) Name of the tested medium

(2) Large, commonly used, and low traffic.

(3) Work pressure, working temperature

(4) Medium density and viscosity (water, steam, commonly used gases may not be provided)

(5) Pipeline material, inner diameter, outer diameter
3、 Selection