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梦之城娱乐平台_CITY OF DREAM【官方彩票】
Product Model:梦之城娱乐平台_CITY OF DREAM【官方彩票】
1.Working Principle:
The vortex flowmeter operates on the basis of Karman vortex street principle. If put a vertical cylinder in flow fluid,during the range of Reynolds number will alternate to form a regular vertex behind the cylinder two sides,named as Karman vortex street.The direction of vortex street is inward,up will form a clockwise rotation,down will form a counter-clockwise rotation,the frequency in single side in proportion to flowrate, in inverse proportion to the diameter of vortex producer,the relationship of them as following:
f=St×v/d
In the formula:St-Jack straw Hal number;f-frequency product by single side vortex;v-flowrate;d-diameter.
Instrument parameters K: a ratio of separation pulse amount of vortex to the volume amount:
K=N/V
In the formula:
K-instrument coefficient (pulse 1/m3)
N-pulse number (time)
V-volume amount
The relationship between the vortex separation frequency and liquid flow is as follows:
f=K×Q
In the formula:
f-frequency (time)
Q-flow (m3/h)
By testing the vortex separation frequency, the liquid flow in the pipe can be measured.
2.Type Selection:

Model
Instruction
1 2 3 4 5 6 7 8 9 10
                Karman Vortex Street
LUG               Stress Type Testing
Measuring Ways 1           Flange connection(GB9119-2000)
2           Clamp flange(equip with flange and bolts in factory)
Medium 1         Both for gas and liquid
2         Liquid
3         Gas
4         Steam
Diameter 02       DN25
04       DN40
05       DN50
08       DN80
10       DN100
15       DN150
20       DN200
25       DN250
30       DN300
Operation Condition Blank     Normal Type
B     Intrinsic safety,iaIICT6
Signal Output P   Voltage pulse, 24V power Hand operator and digital control meter is optional
S   Pulse,4~20mA, on-site,24V power Optional Input ports:HART,temp.(PT100),pressure sensor,pressure transmitter
D   On-site,without any display,lithium battery Without any input ports
Structure F Separated Type
Z Integrated Type


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