Low temperature liquid mass flowmeter _ Koweiler

Low temperature liquid mass flowmeter _ Koweiler

principle&structure

'The thermal gas mass flowmeter is designed based on the principle of thermal diffusion, and uses the constant temperature difference method to accurately measure gases. It has the advantages of small size, high degree of digitization, easy installation, and accurate measurement.

The sensor part consists of two reference level platinum resistance temperature sensors. When the instrument is working, one sensor continuously measures the temperature of the mediumT1The other sensor self heats up to a temperature higher than the medium temperatureT2It is used to sense fluid flow velocity and is called a velocity sensor. This temperatureΔT=T2-T1，T2>T1When fluid flows through, gas molecules collide with the sensor andT2The heat is carried away, makingT2If the temperature drops, in order toΔTTo remain unchanged, we need to improveT2The power supply current, the gas flow rate, and the heat carried away are faster, and there is a fixed functional relationship between the gas flow rate and the increased heat.'

formula1

among whichρg --Fluid specific gravity (related to density)

V —flow velocity

K —Balance coefficient

Q —Heating capacity (related to specific heat and structure)

ΔT —temperature difference

Due to the fact that the temperature of the sensor is always automatically and consistently higher than the temperature of the medium (environment)30℃Left and right, so the thermal gas flowmeter does not require temperature compensation in principle.

The applicable temperature range of the thermal gas mass flowmeter is-40-220℃.

（1）The specific gravity and density of the fluid in the formula are related

formula2

among whichρ_g —Medium density under working condition volume（kg/m3）'From the formula1and2It can be concluded that the functional relationship between flow rate and operating pressure, gas density, and operating temperature has been determined.

The constant temperature differential thermal gas mass flowmeter is not affected by temperature and pressure, and does not require correction of pressure and temperature.

'

ρn —Medium density under standard conditions（101.325 KpaThe20℃） （kg/m3）

P —Operating pressure（KPa）

T —Operating temperature（℃）

Low temperature liquid mass flowmeter _ Koweiler

application

●All inert gases and clean gases without condensation, combustible gases such as methane, propane, hydrogen, and biogas;

●and316LStainless steel compatible with corrosive gases, etc

FGMThe series thermal gas mass flowmeter is a new type of flow meter that can conveniently and accurately detect the mass flow of air, nitrogen, hydrogen, oxygen, chlorine, natural gas, flue gas, biogas, and other gases flowing in pipelines without temperature and pressure compensation. It can be widely applied in the process control and gas flow measurement of petroleum, chemical, metallurgical, power, water treatment, papermaking, food, medicine, cement, textile and various production and research units for gas production and consumption.

Typical application scenarios

*Measurement of Gas Flow in Steel and Coking Plants

*Gas flow measurement in the production process of cement, cigarettes, and glass factories

*Boiler air flow and secondary air volume measurement

*Compressed air flow measurement

*Measurement of Smoke Flow from Chimney Emissions

*Measurement of flow rates for various mixed gases such as natural gas, coal gas, liquefied gas, torch gas, argon gas, carbon dioxide, etc

*Measurement of aeration flow rate in water treatment

*Measurement of Gas Flow in Steel and Coking Plants

*Measurement of primary air, secondary air, cold air return air volume in power plants

*High pressure low flow hydrogen gas for generator cooling

*Measurement of Torch Gas in Chemical Plants

*Top blown argon gas in steel plant

feature

Without pressure and temperature compensation, directly measure the mass flow rate of gas.

High sensitivity, especially suitable for flow measurement of large pipe diameters and low flow rates.

High repeatability, high reliability, high stability, and high precision.

The pressure loss is extremely small and almost negligible.

Wide range of measurement: maximum achievable100 :1The above.

Diverse structures, flexible installation, easy loading and unloading, and convenient use.

Explosion proof and corrosion-resistant design, suitable for harsh working conditions and corrosive environments.

On site rotation angle of display screen0~270°

Size chart

FGM10Online pipeline type

Unitmm

FGM20Card sleeve thread insertion typeReference flow range

Note: The above flow rates are for pipeline installation methods, where the medium is air, nitrogen, or other gases that are close to ideal. For other gases or those that do not belong to the diameter listed above, please contact the sales engineer.

For plug-in flow meters, their measurement range is generally divided according to the speed mode as follows:

a)0~0.5m/s

b) 0~1.0 m/s

c)0~2.5 m/s(recommend)

d) 0~5.0 m/s(recommend)

e)0~10.0 m/s(recommend)

f) 0~25.0 m/s(recommend)

g) 0~50.0 m/s

h) 0~60.0 m/s

Selection Table

Koweiler (China) Automation Co., Ltd. is located in Shanghai and specializes in steam flow meters, sewage flow meters, electromagnetic flow meters, vortex flow meters, turbine flow meters, gear flow meters, ultrasonic flow meters, pressure transmitters, pressure controllers, pressure switches, differential pressure transmitters, differential pressure switches, temperature transmitters, temperature controllers, temperature switches, and other products. On the basis of adhering to technological innovation, the company attaches great importance to quality management, continuously improves service levels, and achieves the healthy development of the company's business. We actively participate in promotion and industry exchange activities. In the long-term development process, our company has established long-term and good partnerships with many large domestic manufacturers based on our excellent product quality, good product performance, and technological advantages. Our service tenet is honesty, fairness, trustworthiness, reasonable price, equality and mutual benefit. With strong economic strength and adherence to the principle of honesty, the company has won the trust of many customers and gained a good reputation in the industry.