Small Vortex Flow Meter Measures Steam Gas

Note
1. As far as possible, the regulating valve should not be installed in the upstream of vortex
street flow meter, but should be installed 10D beyond the downstream of vortex flow meter. 2. Inner diameters of upper and lower piping shall be the same. If there is any difference, the
relationship between piping inner diameter Dp and vortex street meter inner diameter Db should
meet the following requirements:0.98 Db Dp or less or less 1.05 Db;
3. The upstream and downstream piping should be concentric with the internal diameter of
flow meter, and the coaxiality between them should be less than 0.05Db;
4. The sealing gasket between the meter and flange cannot be protruded into the pipe during
installation, and its inner diameter should be 1-2mm larger than the inner diameter of the meter;
13
5. Installation design of pressure hole and temperature hole. When temperature and pressure
transmitters need to be installed in the measured pipeline, the pressure measuring hole should be set
at the downstream 3-5d and the temperature measuring hole should be set at the downstream 6-8d. D
is the nominal diameter of the instrument, unit: mm;
6. The meter may be installed horizontally, vertically, or diagonally on the pipe. 7. When measuring gas, install the instrument in the vertical pipe with unlimited gas flow
direction. However, if the pipe contains a small amount of liquid, in order to prevent the liquid from
entering the gauge pipe, the airflow should flow from the bottom up, as shown in FIG. (iv) a;
8. When measuring liquid, in order to ensure that the tube is filled with liquid, the direction of
liquid flow should be ensured from the bottom up when installing the instrument in the vertical or
inclined pipeline. If there is a small amount of gas in the pipe, the instrument should be installed at
the lower part of the pipe to prevent the gas from entering the measuring pipe, As shown in FIG. (iv)b.

9. Heat preservation measures should be paid attention to when measuring high temperature
and low temperature media.The high temperature inside the converter (inside the watch head shell)
should not exceed 70℃ generally; Low temperature may cause condensation inside the converter, reduce the insulation impedance of the circuit board, and affect the normal operation of the meter.

Product description
The vortex flowmeter manual records how to use the product correctly and safely.Please read
this manual carefully before installation and debugging in order to prevent the instrument from being
damaged or unable to perform its best performance and ensure the stable operation of the instrument. Step 1: open the box inspection must read
1. Check the packing list to see whether the accessories are complete. 2. Appearance inspection to see if the instrument is complete and damaged due to
transportation;
3. Power test. If the battery is powered up, turn on the switch to check the display state of the
meter.4. Check whether the installation accessories are complete and prepare for installation. Step 2: read the installation steps
1. Choose an appropriate installation environment. The ambient temperature should be
-20-55℃, and the ambient humidity should be within the range of 5%-90%. See 6.1 installation
environment requirements for the instrument for details;
2. Welding the product accessories, instruments should not be online welding (flange clamping
instrument),Online welding may cause sensor thermal damage;
3. Purge the pipeline to ensure that there is no residual welding slag in the pipeline;
4. Install the instrument, pay attention to the direction sign of the instrument, prohibit reverse
installation, ensure that the front and rear straight pipe meet the requirements,See installation
requirements of instrument pipelines in 6.2 for details;
5. Open the front valve slowly to prevent air hammer or water hammer phenomenon from
hurting the instrument;
6. Pipeline pressure test and leak detection to ensure that the pipeline does not leak;
7. Air tightness test to ensure that the installation instrument meets the sealing requirements;
8. Slowly open the back end valve to ensure stable flow field of medium passing through;
9. Instrument for normal operation;
10. Intallation environment should avoid violent vibration, vibration environment will lead to
unstable flow or static flow.In the case of slight vibration, pipe fastening device can be installed at
the upstream and downstream 2D position, and soft connection can be installed at the connection
place with the fan and other equipment. 11. The installation diagram of vortex flowmeter is as follows:

Features
1. The main body of the product has no moving parts,high reliability,long-term stability,simple
structure and easy maintenance.  The output of the sensor is the pulse frequency, and its frequency is linear with the actual flow of
the measured fluid, there is no drift at zero, and the performance is very stable.  The structure forms are various, including pipe type, plug type flow sensor and so on.  The measurement accuracy of conventional liquid is ±1.0%.The accuracy of the gas
measurement was ±1.5%；
2. The pressure loss is small (about 1/4 to 1/2 of orifice flowmeter), which belongs to
energy-saving flow meter;
3. Flexible installation mode, can be horizontal, vertical or inclined to different angles according to
different process pipeline；
4. Circuit adopts a variety of protection mode, anti-surge, strong adaptability；
5. High precision probe, piezocrystalline vortex sensor, stable signal.The 316L stainless steel
sensor shell has strong corrosion resistance and good intercrystalline corrosion resistance. It also
has good corrosion resistance to alkali solutions and most organic and inorganic acids；
6. Long life lithium battery: equipped with 3.6v high poly lithium battery, with high storage energy
density, the service life of more than 1 year；
7. Products high and low temperature adaptability, environmental protection and other advantages；
8. Wide measuring range, measuring range ratio up to 1:10-25；
9. Within a certain Reynolds number range, the output signal frequency is not affected by the
physical properties and component changes of the fluid, and the instrument coefficient is only
related to the shape and size of the vortex generator,There is no need to compensate when
measuring the volume flow rate of the fluid condition

Working principle
Vortex flowmeter is a speed-type flowmeter produced according to karman's vortex principle, which can be used for the measurement and metering of conventional gas, steam and liquid.Vortex
flow sensor has high precision and wide range ratio, no moving parts in use, which can improve
mechanical stability and reduce maintenance.Vortex flowmeter is almost not affected by the
temperature, pressure and composition of medium when measuring the volume of working condition. Therefore, it is convenient to calibrate the instrument, so vortex flow meter is widely used in
production and life.

Karman Vortex
Alternating and regular vortex rows are formed downstream of the vortex generator. Assume that the frequency of vortex occurrence is f, the average speed of the flow of the measured medium is V, and the width of the vortex generating body's upstream surface is d. According to the Karman vortex street principle, there is the following relationship:
f=StV/d formula (1)
In the formula:
f - Karman vortex frequency HZ generated on one side of the generating body
St-Strauhal number (dimensionless number)
V-Average flow velocity of fluid (m/s)
d-width of vortex generator (m)
It can be seen that the instantaneous flow rate can be calculated by measuring the Kaman vortex separation frequency. Among them, Strohal number (St) is a dimensionless unknown number,
The figure below shows the relationship between Strouhal number (St) and Reynolds number (Re).

Strouhal number and Reynolds number
In the straight part of St=0.17 in the curve table, the vortex release frequency is proportional to the flow rate, which is the measurement range of the vortex flow sensor. As long as the frequency f is detected, the flow rate of the fluid in the pipe can be obtained, and the volume flow rate can be obtained from the flow rate V. The ratio of the measured pulse number to the volume is called the instrument constant (K), see formula (2)
K=3600f/Q(1/m³) Formula (2)
In the formula: K=instrument constant (m-3).
f=number of pulses
Q=volume flow (m³)



FAQ
1. Q: What information need to be provided to choose the suitable model?
A: Application field, Nominal pressure ,Medium & medium temperture , Power supply , Output,
Flow range, Accuracy, Connection and other parameters.
2. Q: Are you a trade company or a manufacturer?
A: We are an ISO approved manufacturer specialized in level and flow measuring instruments.
OEM & ODM service are available. Welcome to visit us in China.
3. Q: What is your MOQ?
A: To start our cooperation, sample order is acceptable.
4. Q: What is your delivery date for the Intelligent Mini Micro Turbine Fuel Oil Diesel Flow Meter?
A: The delivery date is about 3-15 working days after receipt of payment.
5. Q: What is your payment terms?
A: We support T/T, PayPal ,Western Union.
For mass production order, it is 30% deposit in advance and 70% balance before shipment.
6. Q: Do you have a warranty for the Flow Meter?
A: Yes, we have the warranty of 12 months.

Suzhou Beite Smart Instrument Co., Ltd. was established in 2007.It is an automated instrument manufacturer integrating R&D, design, manufacturing, sales and system complete services.

After years of development, the company's new factory covers an area of ​​15 acres, with a workshop area of ​​4000m2. It has complete production and processing equipment. The electronics workshop has a modern SMT assembly line and a complete electronic design laboratory. The machinery workshop has multiple precision CNC lathes, ordinary lathes, CNC milling machines, fully automatic circumferential seam welding machines, drilling machines and other equipment. The calibration workshop has two liquid calibration test lines and one small and medium flow gas calibration test line. Each product has been actually calibrated and verified to ensure product quality.

The company has strict quality control in every aspect from product design, raw material procurement and processing, manufacturing and assembly, testing and inspection to product delivery, striving for zero defect products, and using scientific management, strict technology, sophisticated equipment, to ensure product quality. quality. The company's products, from hardware to software, all have the company's independent intellectual property rights.

The company's products are widely used in municipal administration, petroleum, chemical industry, metallurgy, pharmaceuticals, thermoelectric papermaking, food environmental protection and scientific research fields, and are exported to Southeast Asia, South America, Europe and other countries. Beite's integrity, strength and product quality have been recognized by the industry.

The company's main products include metal tube float (rotor) flowmeters, glass rotor flowmeters, plastic tube flowmeters, turbine flowmeters, thermal gas mass flowmeters, gas turbine flowmeters, intelligent electromagnetic flowmeters, vortex flowmeters, pipeline ultrasonic flowmeters, magnetic flap level meters, ultrasonic level meters, intelligent radar level meters, pressure transmitters, flow totalizers, batch control systems, etc. There are more than a dozen series and hundreds of varieties.