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VA Piezoelectric Vortex Shedding Flowmeter

Current location:Home page -> Product -> Gas Flowmeter

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■Product Introduction
With world's best technology, the VA vortex shedding flowmeter has excellently reliable performance. It conforms with China's machinery industry standard JB/T9249—1999 《Vortex Shedding Flow Transducer》.It is capable of measuring saturated vapor, overheated vapor, industry water, drain off water, hot/cold liquid, liquified gas, natural gas, city coal gas, compressed air, etc.. It is widely used in various industries such as metallurgy, petrochemical, light manufacturing, food, sewage treatment, etc.

VA series vortex flowmeter is the introduction of the most advanced international technology manufacturing, product performance is stable and reliable, in line with the People's Republic of China machinery industry standard JB / T9249-1999 "vortex flow sensor." This series of products can measure the saturated steam, superheated steam, industrial water, drainage, high and low temperature liquid, liquefied petroleum gas, natural gas, city gas, compressed air and other media, widely used in metallurgy, petrochemical, light industry, food and sewage treatment And other industries.

Vortex flowmeter rapid development, belonging to the youngest class of flow meter, is also a common class of flow meter. Elegant vortex flowmeter combined with 60 years of production experience, the latest technology and production technology in one, exquisite design, superior performance, is one of the more popular flow meters.

■ How it works
The vortex flowmeter is a kind of flowmeter manufactured by the principle of Carmen vortex and the design of modern electronic technology. The frequency of vortex is proportional to the velocity of the fluid. Under certain conditions, the viston f = St * v / d (f - vortex generation frequency; V-flow rate; d-triangular column width; St-Strohar constant)

The fluid vortex produces alternating pressure on the triangular column. The piezoelectric signal is detected by the piezoelectric signal sensor and amplified by the preamplifier to become the standard electrical signal output. Vortex flowmeter can be a wide range of gas (including steam) and liquid volume calculation, with the flow totalizer and temperature, the pressure sensor can be a variety of quality operations and a variety of parameters.

■Technical Parameters
▶The body part
Nominal diameter 15、20、25、32、40、50、65、80、100、125、200、250、300
materials Body C:316L D:304
Triangular prism C或D
Support tube D
Sensor housing 316L
Sensor gasket Stainless steel + flexible graphite combination gasket
Nominal pressure rating(MPa) 1.6,2.0,2.5,4.0,5.0,6.3等(4.0MPa above is a special supply)
Accuracy class grade 1,grade 1.5,grade 2.5
Repeatability error ±0.3%
Fluid temperature(℃) -40~300℃
Installation method Horizontal or vertical
Applicable fluid Liquid (water, high temperature water, chemical liquid, gasoline, etc.)
Gas (natural gas, compressed air, etc.) saturated, superheated steam

▶Amplifier section
Type PA15 PA15Ex
Explosion protection structure Non-explosion Intrinsically safe explosion ExiaⅡCT5 Flameproof ExdⅡBT4
Ambient temperature -30℃~+80℃ -20~+55℃
Degree of protection IP65、IP67
Shell material ZL104
input signal The charge change of the piezoelectric element
output signal

One. Current pulse:“1”is 20mA;“0” is 4mA

Two.Voltage pulse:“1”>5V,“0”<1V

Three. Analog quantity:DC4-20mA

Four. communication:RS485

Wiring interface M20x1.5;ZG1/2 NPT1/2
Power supply DC24V,DC12V,3.6V lithium battery

■Output parameters
diameter(mm) Nominal meter factor(P/L) Highest frequency(Hz)
Liquid Gas
15(1/2") 374.67 510 3434
20(3/4") 132 418 2860
25(1") 61.843 326.4 2233
32(5/4") 35.77 258 1719
40(2/3") 16.609 198.4 1338
50(2") 7.9365 165.3 1080
65(5/2") 4.133 123 823
80(3") 2.3827 105.9 728
100(4") 1.0602 79.5 544.8
125(5") 0.5803 66.7 448
150(6") 0.3297 55.9 382.8
200(8") 0.1424 39.6 277
250(10") 0.0739 32.8 215
300(12") 0.043 27.5 179

■Vortex flowmeter flow range table(unit:m³/h)
▶Liquid (Liquid A according to the proportion of A table reference and B table viscosity reference, the maximum flow rate election A table value, the minimum flow rate election A table value and B table in the maximum)
  Minimum flow rate Maximum flow
Proportion 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2
caliber
15 0.4 0.4 0.4 0.4 0.3 0.3 0.3 0.3 6
20 0.6 0.6 0.6 0.6 0.5 0.5 0.5 0.5 11
25 1.0 0.9 0.9 0.8 0.8 0.75 0.7 0.7 19
32 1.5 1.32 1.2 1.14 1.1 1.0 0.96 0.96 26
40 2.4 2.2 2.0 1.9 1.8 1.7 1.6 1.6 43
50 3.9 3.6 3.3 3.1 2.9 2.8 2.7 2.5 75
65 5.9 5.4 5.0 4.7 4.4 4.2 4.0 3.8 110
80 8.5 7.8 7.2 6.8 6.4 6.0 5.8 5.5 160
100 15 14 13 12 11 11 11 11 270
125 26 25 24 23 22 21 20 19 420
150 47 43 40 37 35 33 32 30 610
200 97 88 82 76 72 68 65 62 1000
250 149 136 126 118 111 106 101 96 1600
300 214 195 181 169 159 151 144 138 2300




■ Ordering instructions
One. User order flow meter to be properly provided nominal diameter, nominal pressure, working pressure, operating temperature, flow range and whether the need to explosion-proof requirements, type and other specific parameters. And with the correct selection.
Two. Order selection should refer to the VA series vortex flowmeter product model markings required to fill in detail
Example: VA1-100-DD1-313-1.0-P4.0
Description: clip-mounted vortex flowmeter, the body material for the stainless steel, nominal diameter of 100mm, intrinsically safe explosion, two-wire system 4-20mA output, nominal pressure 4.0MPa
Metering medium for the general gas, the accuracy of 1.0
Example: VAX-100-DD1-233-1.0-P4.0
Description: clip-mounted vortex flowmeter, the body material for the stainless steel, nominal diameter 100mm, on-site instructions, explosion-proof, two-wire system 4-20mA output, nominal pressure 4.0MPa
The metering medium is saturated steam, with a precision of 1.0
Example: VAXD-100-DD1-12-1.0-P4.0
Description: clip-mounted vortex flowmeter, body material wie stainless steel, nominal diameter 100mm, the scene shows, non-explosion-proof, built-in lithium battery, nominal pressure 4.0MPa, metering medium liquid,
Three. Special requirements are supplied by agreement.