The temperature range and application fields of the elliptical gear flowmeter

In the use of electromagnetic flowmeter measurement, we often have to consider how to deal with the problem of receiving no signal or signal is too weak, we should look for reasons from the following possible problems:

The origin of the thermal gas mass flowmeter is from the hot wire anemometer. The temperature of the platinum heating wire has a proportional relationship with the change in the flow rate of the fluid: the faster the flow rate, the more heat is taken away.

When selecting a thermal mass flowmeter, several important factors should be taken into consideration to ensure it meets the requirements of the application and provides accurate and reliable measurements. Here are key points to pay attention to:

Vortex flowmeters, with their simple structure, high reliability and wide application range, occupy an important position in the field of industrial flow measurement. However, its measurement accuracy is affected by multiple factors, and how to ensure high-precision measurement has become a core issue of concern for users. This article will analyze the accuracy guarantee strategies of vortex flowmeters from the perspectives of design, installation, calibration and maintenance.

Common faults and solutions encountered in the use of ultrasonic flowmeters for sewage

Measuring medium: Conductive liquid
Diameter range: DN3mm～DN3000mm
Accuracy: ± 0.5% of the indicated value, optional ± 0.3% or ± 0.2%
Measuring range (Flow rate): 0.01m/s～15m/s
Electromagnetic flow meter is one of the most popular flow meters. Flange type electromagnetic flow meter has been used for more than 50 years worldwide. It is widely used for all conductive liquids in every industry, such as water, acid, alkali, milk, slurry etc.

Intelligent precession vortex flowmeter is a new type of gas flow meter developed by our company. The flowmeter integrates the function of flow, temperature and pressure detection, and can automatically compensate the temperature, pressure and compression factor. It is an ideal instrument for gas measurement in petroleum, chemical industry, electric power, metallurgy and other industries.

liquid turbine flowmeters are utilized in HVAC (heating, ventilation, and air conditioning) systems to measure the flow of liquids such as water or refrigerants. In this context, they contribute to the efficiency of temperature control systems by providing accurate flow data, enabling precise adjustments and optimal energy utilization in commercial and residential buildings.

Connection mode：Thread, clamp, flange, clamp type
Accuracy：±1%R、±0.5%R、±0.2%R (to be customized)
Sensor material：304, 316 stainless steel, etc
Use conditions： Medium temperature：-20℃～+120℃  Ambient temperature：-20℃～+60℃
Relative humidity：5%-90%         Atmospheric pressure：86Kpa～106Kpa
Signal output function：Pulse signal, 4-20mA signal
Communication output function：RS485 communication, HART protocol, etc
Working power supply：External power supply: 24VDC±15%, ripple ≤±5%, suitable for 4-20mA output, pulse output, RS485, etc
Internal power supply: 1 set of 3.6V10AH lithium battery, the battery voltage can work normally at 2.0-3.0V
Signal line interface：Basic model: Hausmann connector or three-core cable; Explosion-proof type, internal thread M20*1.5
Explosion-proof class：Exia II CT or Exd II BT6
Protection class：IP65 or higher customizable

In steam applications, choosing a vortex flowmeter is not just about temperature ratings.

The real evaluation criteria are:

Does it resist vibration interference?

Can it manage heat transfer to electronics?

Will it still measure accurately at low flow?

Thermal gas mass flowmeter due to its various advantages and characteristics, now has been widely used in various industries flow measurement, in the actual measurement of thermal gas flow meter technical advantages are more and more obvious, the following we on the thermal gas mass flowmeter application occasions and some of their own technical advantages do some introduction, hope to be useful to you:

Gas turbine flowmeter common problem solution

Electromagnetic flowmeter is a speed meter to measure the volume flow of conductive media. While carrying out on-site monitoring and display, it can output standard current signals for recording, adjustment and control, realizing automatic control of detection, and realizing long-distance transmission of signals. It can be widely used in water, chemical, coal, environmental protection, textile, metallurgy, paper and other industries in the flow measurement of conductive liquid. The structure of the instrument has one type and one type.

Performance Technical parameter
Size DN3-DN3000mm
Nominal Pressure 0.6-1.6Mpa(2.5Mpa/4.0Mpa/6.4Mpa…Max 42Mpa)
Accuracy +/-0.5%(Standard)     +/-0.3% or +/-0.2%(Optional)
Liner PTFE, Neoprene, Hard Rubber, EPDM, FEP, Polyurethane, PFA
Electrode SUS316L, Hastelloy B, Hastelloy C       Titanium, Tantalum, Platinium-iridium
Structure Type Integral type, remote type, submersible type, ex-proof type
Medium Temperature -20~+60 degC(Integral type)
Remote type ( Neoprene ,Hard Rubber ,Polyurethane ,EPDM) -10~+80degC
Remote type(PTFE/PFA/FEP) -10~+160degC
Ambient Temperature -20~+60deg C
Ambient Humidity 5-100%RH(relative humidity)
Measuring Range Max 15m/s
Conductivity >5us/cm
Protection Class IP65(Standard); IP68(Optional for remote type)
Process Connection Flange (Standard), Wafer, Thread, Tri-clamp etc (Optional)
Output Signal 4-20mA/Pulse
Communication RS485(Standard), HART(Optional),GPRS/GSM (Optional)
Power Supply AC220V (can be used for AC85-250V)
DC24V (can be used for DC20-36V)
DC12V (optional), Battery Powered 3.6V (optional)
Power Consumption <20W Alarm Upper Limit Alarm / Lower Limit Alarm Self-diagnosis Empty Pipe Alarm, Exciting Alarm Explosion Proof ATEX

The precession vortex flowmeter adopts the latest micro-processing technology, which has the advantages of strong function, wide flow range, simple operation and maintenance, and convenient installation and use. The main technical indicators have reached the advanced level of similar foreign products. Widely used in various gas measurement in petroleum, chemical, electric power, metallurgical coal and other industries

In the process of diameter selection of vortex flowmeter, special attention should be paid to the fact that the diameter of vortex flowmeter cannot be selected according to the original pipe diameter on site. The diameter of the vortex flowmeter should be determined according to the parameters in the pipeline such as the flow range of the medium in the pipeline, working temperature and working pressure, and then combined with the technical parameters of the vortex flowmeter.

Nominal diameter: DN4-DN200mm
Accuracy: ±1%R、±0.5%R、±0.2%R (to be customized)
Instrument type: Field display type, pulse output type, 4-20mA output type, split remote display type
Applicable medium: No impurities, low viscosity, no strong corrosive liquid

The ATWY threaded liquid turbine flowmeter structure is explosion-proof and can display the total flow rate, instantaneous flow rate and flow full percentage. The battery uses a long-acting lithium battery, the service life of the single-function accumulator battery can reach more than 5 years, and the service life of the multi-function display battery can also reach more than 12 months.

Nominal diameter： DN15-DN200mm
Accuracy： 1.0/1.5
Body material: Aluminum alloy, 304 stainless steel
Applicable media: Compressed air, oxygen, nitrogen, carbon dioxide, natural gas, argon, liquefied gas, etc., corrosion, moisture can not be measured, such as chlorine, hydrogen, steam, ammonia.

Ultrasonic flowmeters can be used to measure the flow of fluids and large pipe runoff that are not easily accessible. In practical applications, if the temperature, pressure, the nature of the medium and other conditions are different from the calibration, it is necessary to calibrate the ultrasonic flowmeter, today we talk about the calibration method.

At present, there are many misunderstandings about steam measurement in China, and many users often think that buying a high-price flowmeter can get accurate measurement results. The measurement of steam is different from other fluids such as water, air and other media, and there are many factors affecting its measurement in the actual measurement. Therefore, there is often a phenomenon that the flow meter itself is qualified, but the actual measurement is not “allowed”. So what’s the problem with these factors?

The factors that affect the accurate measurement of vapor gas flowmeter are mainly the following:

Before selecting the model, the type of the medium to be measured and the flow value (which can be an estimated value) should be determined first. Then, according to the flow range corresponding to the vortex flowmeter when measuring different media as shown in the table, the specification of the vortex flowmeter should be selected.

To ensure the normal operation of ultrasonic flowmeters, property owners must choose high-quality products. When selecting ultrasonic flowmeters, property owners can judge the product quality from these aspects.

For the selection of gas turbine flowmeter, please consider from the following aspects:

1. The sensor structure of the electromagnetic flowmeter is simple, and there are no moving parts in the measuring tube, nor any throttling parts that hinder the flow of fluid. So when the fluid through the flow timing will not cause any additional pressure loss, electromagnetic flowmeter is a very low energy consumption flow meter.

The following aspects must be paid attention to when measuring natural gas with the precession vortex flowmeter:

Gas flowmeters should be installed indoors as much as possible. If they are installed outdoors, measures should be taken to avoid direct sunlight and prevent rain.

The reasonable selection of ultrasonic flowmeter model can ensure the more effective application of ultrasonic flowmeter. The choice of which type of ultrasonic flowmeter should be based on the physical and chemical properties of the measured medium to choose, so that the nominal diameter of the ultrasonic flowmeter, flow range, lining material, electrode material and output current can adapt to the nature of the measured medium and flow measurement requirements.

The selection of gas turbine flow meter should be considered from the following aspects:

The main sources of faults in electromagnetic flowmeters caused by pipeline systems and related equipment are:

Nominal diameter： DN15-DN200mm
Accuracy： 1.0/1.5
Body material: Aluminum alloy, 304 stainless steel
Applicable media: Compressed air, oxygen, nitrogen, carbon dioxide, natural gas, argon, liquefied gas, etc., corrosion, moisture can not be measured, such as chlorine, hydrogen, steam, ammonia.