Flange Version Vortex Flow Meter -80

Working principle
To install a vortex generator(bluff body)in the fluid,which can produces regular vortex at both sides of the vortex generator altematively.Such vortex is called Karman Vortex.Vortex trains are asymmetrically arranged at the downstream of the vortex geberator. Suppose the generating frequency of the vortex is f,the average speed of the incoming flow of the tested medium is V,the head-on width of the vortex generator is d,and the diameter of the flowmeter is D,and base on the principles of Karman Vortex,the following relations will be obtained:  
    cart(1)
                   f=StV/d           Formula (1)     
 
 
Note:f- Suppose the generating frequency of the vortex
     St-Strouhal number
     V-average flow velocity at both sides of the vortex generator
d- the vortex geberator body width
 
Thus, by measuring the Carmen frequency of vortex separation of instantaneous flow rate can be calculated. Among them, Strouhal number ( St ) is a dimensionless unknown, Figure ( two) said the Strouhal number ( St ) and Reynolds number ( Re ) relationship.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

                                    chart(2)
In the curve St = 0.17straight section, whirlpool release frequency and velocity proportional to, namely the vortex flow sensor measurement range. As long as the detected frequency f can be obtained within the tube by the flow rate of the fluid, flow velocity and volume flow rate V. The measured pulse number and volume ratio, called the instrument constant ( K ), see type (2)
                      K=N/Q(1/m³)             Formula (2)
K=Instrument constant(1/m³)
N=Pulse number
Q=Volume flow(m³)
 
 
Main technical index                                 Unit(1)

Nominal diameter(mm)	25,40,50,65,80,100,125,150,200,250,300,(300~1000 Insert type)
Nominal pressure (MPa)	DN25-DN200 4.0(>4.0 Supply agreement),DN250-DN300 1.6(>1.6 Supply agreement)
Medium temperature(ºC)	Piezoelectric type:-40~260,-40~320;Capacitance type : -40~300, -40~400,-40~450(Supply agreement)
Body material	1Cr18Ni9Ti,(Other materials supply agreement)
Allowable vibration acceleration	Piezoelectric type:0.2g     Capacitance type:1.0~2.0g
Accuracy	±1%R,±1.5%R,±1FS;Insert type:±2.5%R,±2.5%FS
Range of	1:6~1:30
Power supply voltage	Sensor:+12V DC,+24V DC;Transmitter:+12V DC ,+24V DC;Battery type:3.6V Battery
Output signal	Square wave pulse ( not including the battery power supply type ): high level or low level5V,1V; current: 4~ 20mA
Pressure loss coefficient	In line with the JB / T9249standard Cd = 2.4
Explosion proof marks	Intrinsic safety type: Exd IA CT2-T5 flameproof type: Exd CT2-T5
Protection grade	The ordinary IP65  diving type IP68
Environmental conditions	Temperature - 20~ 55,5% ~ 90% of relative humidity, atmospheric pressure is 86 ~ 106kPa
Applicable medium	Gas, liquid, steam
Transmission distance	Three wire system pulse output type: < 300m, two line standard current output type (4 ~ 20mA ): load resistance less than 750ohm

 
 
 
 
 
 
 
 
 
 
Table (2) reference conditions of vortex flow sensors flow rate range table

Meter diameter (mm)	Liquid		Gas
	Measuring range (m3/h)	Output frequency range(Hz)	Measuring range (m3/h)	Output frequency range(Hz)
25	1.2~16	25~336	8.8~55	190~1140
40	2~40	10~200	27~205	140~1040
50	3~60	8~160	35~380	94~1020
80	6.5~130	4.1~82	86~1100	55~690
100	15~220	4.7~69	133~1700	42~536
150	30~450	2.8~43	347~4000	33~380
200	45~800	2~31	560~8000	22~315
250	65~1250	1.5~25	890~11000	18~221
300	95~2000	1.2~24	1360~18000	16~213
(300)	100~1500	5.5~87	1560~15600	85~880
(400)	180~3000	5.6~87	2750~27000	85~880
(500)	300~4500	5.6~88	4300~43000	85~880
(600)	450~6500	5.7~89	6100~61000	85~880
(800)	750~10000	5.7~88	11000~110000	85~880
(1000)	1200~1700	5.8~88	17000~170000	85~880
>(1000)	Agreement		Agreement

Note: (300) to (1000) diameter for insertion type

4

  
 

chart(3)

Instrument installation dimensions: see figure ( five ), map ( six)
 

Caliber ()(mm) (mm)	A	B	C	CH
15~25	70	55	390	455
40	85	80	385	440
50	85	90	390	450
65	85	105	400	470
80	90	120	420	480
100	85	140	440	500
125	95	168	465	530
150	100	194	490	560
200	102	248	545	610
250	115	300	600	660
300	130	350	650	710

			B

 

Caliber (mm)	DN250	DN300	DN400	DN500	DN600	DN800- 2000
L	60.5	58	65.5	60.5	55.5	45.5

L

                                                            
 
 

									Sensor
			Direction indicator
		Globe valve
			Flange
	Measuring head
					chart(4)

 
 




                                    chart(5)
 
 
 
 
 
 
 
 
Vortex flow meter selection table

Spectrum											Explain
LU											Vortex flow meter
G											Sensor
Detection mode	B										Piezoelectric sensor
	E										Capacitance type sensor
Connection mode			1		Only the full pipe type						Flange connection
			2		Only the full pipe type						The flange clamp type
			3		Only to insert type						Simple insertion type
			4		Only to insert type						Insertion type ball valve
Measurement of medium				2							Liquid
				3							Gas
				4							Steam
Nominal diameter						02 30					DN25               unit:mm DN300
The use of the environment							P				Ordinary type
							B				Explosion proof type
Output signal									1		Pulse output
									2		4 ~ 20mA output current, liquid crystal display
									3		RS-485 communication
									4		Battery powered, with temperature, pressure compensation
									5		The temperature and pressure compensation for one,4 ~ 20mA current output type
									6		The temperature and pressure compensation integrated, battery power supply type
Type description	For example: LUGE2405-P2 full pipe type capacitive vortex flow meter, a flange clamp connection, medium for steam Instrument path for DN50, general 4~ 20mA output current signal

 
2. Sensor the nominal size of the code table
 

Nominal diameter  DN  mm	25	32	40	50	65	80	100	125	150	200	250
Tag number	02	03	04	05	06	08	10	12	15	20	25
Nominal diameter  DN mm	300	350	400	450	500	600	700	800	1000	1200	1500
Tag number	30	35	40	45	50	60	70	80	A0	A2	A5