Intelligent vortex flowmeter Minghong is sold at a discounted price with guaranteed quality. Minghong Automation Instrument Co., Ltd. adheres to the principle of survival through reputation and development through service, and has won the trust of many customers at home and abroad.
MHGBThe vortex flow sensor has no movable parts, a simple and sturdy structure, and measurement accuracy within the specified Reynolds number range is not affected by the temperature, pressure, density, viscosity of the medium. In addition, its intelligent two-wire output and on-site display type also have their unique characteristics: it adopts ultra-low functional consumption single-chip microcomputer technology and usesEEPROMPower off protection for accumulated traffic (time greater than)10The non-linear error of the instrument coefficient was corrected by software, which improved the accuracy of the whole machine measurement.
Using on-site methods24VDCThere are two types of power supply: power supply and battery power supply, which solve a major problem for users who need on-site display or standard signal output in situations where there is no (added) DC power supply on site.
Application of Minghong Instrument Steam Meter Note: Different diameters, parameters, and prices vary
Widely used for measuring the flow of water supply and drainage, industrial circulation, sewage treatment, oil and chemical reagents, compressed air, saturated and superheated steam, natural gas, and various media in large, medium, and small pipelines.
Working principle
Application of vortex flowmeter: This measuring instrument is used for mass or volume flow, gas, liquid, steam and other media. It can be widely used in various pipelines of large, medium and small enterprises and factories, such as water supply and drainage, petroleum, chemical, metallurgical, thermal, textile, papermaking, industrial circulation, thermal power plants, external steam sales, heating, sewage treatment, oil and chemical reagents, compressed air, saturated and superheated steam, natural gas, etc(Oxygen, nitrogen, hydrogen, natural gas, coal gas, etc)Measurement of various media flow rates Measurement and control of liquids (such as water, benzene, etc.).
The vortex flow sensor is a fluid oscillating instrument developed based on the principle of "Karman vortex street", which can be represented by the following equation:
(1)In the formula:f: Vortex separation frequency
StStrouhal number
v: Flow rate
dWidth of vortex generator
KInstrument coefficient: the ratio of the total pulse volume to the total volume of vortex separation
KInstrument coefficient: the ratio of the total pulse volume to the total volume of vortex separation
(1/3m3) (2)
In the formula:KInstrument constant (pulse)l/m3)
N: Total number of pulses (times)
Q: Total volume(m3)
The relationship between vortex separation frequency and fluid flow rate is as follows:(3)As shown
f = K•Q(3)
In the formula:f: Frequency (times)
Q: Traffic(m3 h)
So by detecting the vortex separation frequency, the flow rate of the pipeline fluid can be measured.
performance index
The nominal Tongjing(mm) 20,25,40,50,80,100,150,200,250,300
material1Cr 18Ni 9Ti
Nominal pressure(Mpa)2.5Mpa(>2.5MpaNegotiated supply
Temperature of the tested medium ℃ -40~+250℃-40~+350℃
accuracy class 0.5,1.0,1.5,
Range degree1:10
Resistance loss coefficientCd<2.4
output signal Voltage pulse low level ≤1VHigh level ≥5VCurrent output:4~20mADC
environmental condition Temperature -10~+55℃, relative humidity5%~90%Atmospheric pressure86~106Kpa
power supply+12V±3VDC,24V±3VDC
Signal transmission lineSTVPV3×0.3(Three wire system),2×0.3(Second line system)
Distance 1000Meter (converter output),5~20Meter (separated sensing signal output)
Explosion proof safety barrier model Pulse output:XSJType,4~20mADCoutputXSJ-Btype
Note: The measured medium is a single fluid or is considered a single fluid
Flow range of sensor, sensor diameterDN(mm)Liquid, gas, vapor
20 1~10 5~40 8~80
25 1.6~16 8~60 12~120
40 2~30 18~160 20~250
50 3~50 30~300 30~400
80 10~130 70~600 100~1200
100 15~200 100~1000 200~2000
150 40~450 200~2000 450~4500
200 80~1000 400~4000 800~8000
250 120~1200 700~8000 1200~12000
300 180~2000 900~10000 1600~16000
Fluid refers to warm water at normal temperature(t=20℃,P=1000kg m3)
Gas refers to ambient temperature and pressure air(t=20℃,P=0.1MPa,P=1.205kg/m3)
Steam refers to dry saturated steam(t=143℃,P=0.4MPa,P=2.129kg/m3)
Product Model and Marking describe
LUGB- Using the principle of Karman vortex street and flow sensor
Installation method:1Flange connection (body flange standard:GB9115.10.88)
2Flange mounting (factory provided mounting flange and bolts)
Tested medium:1gas2liquid3steam
Caliber:15mm 20mm 25mm 32mm 40mm 50mm 65mm 80mm 100mm 150mm 200mm 250mm
300mm
Output method:PpulseR RS485communicationS 4~20mADCtwo-wire systemDBattery powered, on-site LCD display
Explosion proof gradeBIntrinsic safety explosion-proof,iaⅡCT6
Note: Two in the mark“B”Represent their meanings by their respective numbered positions
Example: Choose a flange mounted steamDN50The product model of the explosion-proof split type current output instrument should be:LUGB-2305FSBtype
Sensors should not be used in situations with high vibration levels, and should be installed as far away from the pump as possible to avoid introducing non flow signals.
If it is necessary to open the converter end cover on site, be sure to tighten the cover after the operation to prevent the circuit board from getting damp.
Sensors should be regularly cleaned when the medium is dirty and contains a lot of suspended solids, and the sensing probe should not be damaged during cleaning.