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Telephone: +86 182-2103-2874
Address: Room 402, building B, shuangshuanglou, 650 shenzhuan Road, Songjiang District, Shanghai Online consultation

Gas Precession Vortex Flowmeter

The intelligent gas Precession Vortex flowmeter is a new type of gas flow meter developed by our company, which has the leading level in China. The flowmeter integrates flow, temperature and pressure detection functions, and can automatically compensate temperature, pressure and compression factor. It is an ideal instrument for gas measurement in petroleum, chemical, electric power, metallurgy and other industries. ...
Hotline: 182-2103-2874

Product introduction

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Cx-svfm intelligent gas Precession Vortex Flowmeter

 Gas Precession Vortex Flowmeter gas flowmeter nitrogen flowmeter gas flowmeter compressed air flowmeter Gas Precession Vortex Flowmeter gas flowmeter nitrogen flowmeter gas flowmeter compressed air flowmeter ?
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The intelligent gas Precession Vortex flowmeter is a new type of gas flow meter developed by our company, which has the leading level in China. The flowmeter integrates the functions of flow, temperature and pressure detection, and can automatically compensate temperature, pressure and compression factor. It is an ideal instrument for gas measurement in petroleum, chemical, electric power, metallurgy and other industries.
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Flow meter structure:
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1. Vortex generator
It is a spiral blade with a certain angle, which is fixed in the front of the shell contraction section, forcing the fluid to produce strong vortex flow.
2. Housing
According to different working pressure and service conditions, the shell material can be cast aluminum alloy, stainless steel, red copper, etc. ?????????
3. Intelligent flowmeter totalizer
It is composed of temperature and pressure detection analog channel, flow detection digital channel, micro processing unit, liquid crystal drive circuit and other auxiliary circuits. ???????????????
4. Temperature sensor
PT100 platinum resistance is used as temperature sensitive element, and its resistance value is corresponding to temperature in a certain temperature range.
5. Pressure sensor
With piezoresistive diffused silicon bridge as sensing element, the bridge arm resistance will change as expected under the action of external pressure. Therefore, under the action of certain exciting current, the potential difference between the two output terminals is directly proportional to the external pressure.
6. Piezoelectric crystal sensor
The frequency signal of vortex precession can be detected by installing it near the throat of shell expansion section.
Racemizer
It is fixed at the outlet section of the shell, and its function is to eliminate the vortex flow, so as to reduce the impact on the performance of downstream instruments.
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working principle:
The flow profile of the flow sensor is similar to that of the venturi tube (Fig. 2). A set of spiral guide vanes are placed at the inlet side. When the fluid enters the flow sensor, the guide vanes force the fluid to produce violent vortex flow. When the fluid enters the diffusion section, the vortex flow is affected by the backflow, and begins to make a second rotation, forming a gyroscopic vortex precession phenomenon. The precession frequency is directly proportional to the flow rate and is not affected by the physical properties and density of the fluid. Finally, the signals are sent to the front end of the display screen, which are directly proportional to the flow rate, flow rate and pressure.
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1. Specifications, basic parameters and performance indexes of flowmeter
Nominal diameter
DN(mm)
Flow range
(m3/?h)
Working pressure (MPA) Accuracy class Repeatability
fifteen 1.5~12 one point six
two point five
four
six point three
ten
sixteen
twenty-five
forty-two
one
one point five
Less than 1 / 3 of the absolute value of the basic error limit
twenty 2~15
twenty-five 3.0~30
thirty-two 6.0~60
forty 7.0~70
fifty 10~130
eighty 30~400
one hundred 70~800
one hundred and twenty-five 90-1000
one hundred and fifty 190~1900
two hundred 240~3600
Standard condition: P = 101.325kpa, t = 293.15K
Service conditions:
Ambient temperature: - 30 ℃~ + 65 ℃
Relative humidity: 5% - 95%
Medium temperature: - 20 ℃~ + 80 ℃
Atmospheric pressure: 86kpa ~ 106kpa
External power supply: + 24 VDC ± 15%, ripple < 5%, suitable for 4 ~ 20mA output, pulse output, alarm output, RS-485, Hart, etc;
Internal power supply: a group of 3.6V lithium batteries (er26500), when the voltage is lower than 3.0V, under voltage indication appears.
Power consumption:
External power supply: < 2W;
Internal power supply: the average power consumption is 1MW, which can be used for more than two years.
Output mode:
1) Pulse output
2) Equivalent output
3) RS-485 isolation
4) 4-20mA standard current signal (photoelectric isolation)
It is directly proportional to the standard volume flow, 4mA corresponds to 0 m3 / h, 20 mA corresponds to the maximum standard volume flow (the value can be set in the first level menu), system: two wire system or three wire system, the flowmeter can automatically identify according to the inserted current module and output correctly.
Explosion proof sign: ExdIIBT4; ExiaIICT4
Protection grade: IP65
pressure loss
The actual pressure loss calculation formula of flowmeter is as follows:
………………… (1)
Where:
Δ P1 · - actual pressure loss of flowmeter (kPa);
ρ -- density of measured medium (kg / m3)
When the dry medium pressure loss is Δ, see the figure below
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Connection port: outlet interface is M20 × 1.5 internal thread.
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Outline dimension drawing:
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Flange connection
Nominal diameter
DN(mm)
Nominal pressure
(MPa)
Overall dimension (mm) Body material weight
(kg)
Connection mode
Body length a Height h stainless steel aluminium alloy
15/20 1.6、2.5、4.0 one hundred and sixty three hundred and sixty six Flange type
Screw type
Clamp type
6.3、10 one hundred and sixty three hundred and sixty-five ? eight
twenty-five 1.6、2.5、4.0 one hundred and eighty three hundred and sixty-seven seven
6.3、10 one hundred and eighty three hundred and seventy-eight ? ten
thirty-two 1.6、2.5、4.0 two hundred three hundred and eighty-three nine
6.3、10 two hundred four hundred and two ? twelve
forty 1.6、2.5、4.0 two hundred three hundred and eighty-three nine
6.3、10 two hundred four hundred and two ? twelve
fifty 1.6、2.5、4.0 two hundred and thirty four hundred and three eleven
6.3、10 two hundred and thirty four hundred and twenty-one ? fourteen
eighty one point six three hundred and thirty four hundred and thirty-eight eleven
2.5、4.0 three hundred and thirty four hundred and thirty-eight ? eighteen
6.3、10 three hundred and thirty four hundred and forty-six ? twenty-one
one hundred one point six four hundred and ten four hundred and sixty-eight fourteen
2.5、4.0 four hundred and ten four hundred and seventy-five ? eighteen
6.3、10 four hundred and ten four hundred and eighty-three ? thirty-three
one hundred and fifty one five hundred and eighty-five five hundred and forty-two twenty-one Flange type
1.6、2.5 five hundred and eighty-five five hundred and forty-nine ? fifty-two
4.0、6.3、10 five hundred and eighty-five five hundred and seventy-two ? seventy-two
two hundred one seven hundred six hundred and eighteen forty-one
1.6、2.5 seven hundred six hundred and twenty-six ? one hundred and seventeen
4.0、6.3、10 seven hundred six hundred and thirty-four ? one hundred and twenty-seven
Note: high pressure gauges need to be customized, and the common ones are 10MPa, 16MPa, 20MPa, 25MPa and 42MPa.
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