LGW Double Venturi TubeDetailed product description：

Good results have been achieved in the measurement of combustion air, cold air, and gas (blast furnace gas, coke oven gas, converter gas) in hot blast furnaces of steel plants, as well as in the measurement of primary and secondary air and other large-diameter, low flow velocity pipelines in boilers of thermal power plants.

Solve the precise measurement of various gas flow rates in current industrial enterprises with low pressure, large pipe diameter, and low flow rate. It is the only high-precision, wide measurement range, and easy to install fluid measurement device in China that has obtained a license for manufacturing measuring products. The unique structural design and data processing method have strict fluid mechanics basis and have been calibrated in the national key wind tunnel laboratory for real flow.

LGW Dual Venturi Tube Usage:

It can be widely used for the control and measurement of large-diameter fluids in industries such as petroleum, chemical, metallurgical, and power.

Characteristics of LGW Dual Venturi Tube:

(1) The resistance generated by the fluid is small, about 150Pa, so the energy consumption is low.
(2) Large pressure difference, high accuracy, and wide measurement range.
(3) Good stability and smooth pressure difference characteristics.
(4) Wide range of use, generally gas, flue gas, blast furnace gas with high impurities, etc., long-term use does not cause blockage.
(5) Easy to install and convenient for long-term maintenance.
(6) The required front and rear straight pipe sections are shorter than the standard throttling device, about 1.5D before and 1D after.
(7) It has an integrated structure with online temperature and pressure self correction.

Technical requirements for LGW dual Venturi tube:

(1) Applicable industrial pipelines: circular section pipelines with nominal diameter of DN=500~4000mm, rectangular section pipelines with W × H=600 × 600~3600 × 3600mm, and rectangular pipelines with different widths and heights.
(2) Nominal pressure: PN ≤ 6.4MPa
(3) Working temperature: below 400 ℃ (if above 400 ℃, please specify when ordering)
(4) Differential pressure values: 0~1.0, 1.6, 2.5, 4, 6.3, 10, 16, 25, and 40KPa
(5) Repetitive error: ± 0.5%
(6) Stability: ± 10Pa
(7) Accuracy level: Level 0.5, Level 1, Level 1.5, Level 2
(8) Sensor connector size: welded steel pipe G3/4 ", M20 × 1.5 or 1/2NPT
(9) Measurement media, metallurgy: blast furnace gas, cold air, combustion air, flue gas, recovered gas, mixed gas
Electricity: primary air, secondary air, coal wind, etc
Chemical industry: Rich gas, air and other media
Double Venturi velocimeter is a type of flow measurement device used for large-diameter flue gas pipelines in power plants. It is a differential pressure sensing element used to measure the flow velocity of large-diameter pipelines, and can be used in conjunction with differential pressure transmitters, recording and display instruments to obtain the instantaneous flow velocity value at the measured point inside the pipeline. The flow rate inside the pipe can also be adjusted by adjusting the instrument, with the following characteristics:
Compared with the previous throttling device, it has a smaller volume, minimal permanent pressure loss, a simpler structure, and is very convenient for inspection, cleaning, and maintenance.
Compared with pitot tube, Annubar flowmeter, and averaging tube flowmeter: