Description
General Introduction
Vortex steam flow meter measures fluid velocity adopting a principle of operation referred to as the Karman Vortex effect.
Vortex flow meter utilizes robust piezoelectric elements to detect Karman vortex frequency behind a shedder bar. It is able to provide real-time data for mass flow, volume flow, temperature, pressure and frequency with one instrument and one process connection of either wafer- or flange-type.
Working Principle
While the fluid passing through the swirl generator(triangular prism, also called shedder bar), it will generate swirl due to the acceleration of partial flow rate. The swirl will arise alternatively in two swirl lines, which is called Karman swirl.
The frequency of Karman swirl depends on the size of shedder bar and flow rate of fluid, which will be indicated by the below formulas:
F=sR*v (1-1.27*d/D) Q=3600*F/K M=Q*P
▪ F……The releasing frequency of Karman vortex (Hz)
▪ Sr…..Strouhal number (unit: dimensionless)
▪ V……Medium flow rate (m/s)
▪ d……The width of triangle prim
▪ D……Vortex meter inner diameter (m)
▪ Q…….Instantaneous volume flow rate (m3/h)
▪ K…….Vortex meter coefficient (unit pulse number/m3)
▪ M……Instantaneous quality flow rate (kg/h)
▪ P……..Fluid density (kg/m3)
Service
♦ Perfect and high standard serving system in the overall course of the before, amid and after sale service.
♦ OEM & ODM, change & add new functions, change colors& shapes, etc will try our best to meet the needs of various clients.
♦ Training & trial run under the help of our professional engineers.
♦ 18 months guarantee for flow sensor.
Vortex Flow Meter Applications
♦ (non-)conductive liquids, gases, saturated and superheated steam
♦ Gross/net heat metering of steam and hot water
♦ Monitoring of compressor output and evaluation of Free Air Delivery (FAD)
♦ Industrial gases (natural gas, nitrogen etc.)
♦ Compressed air systems
♦ Thermal oils, Desalinated water etc.
Advantages
♦ Robust and universally applicable for liquids, gases and steam,optimized for steam applications. ♦ Integrated pressure and temperature compensation.
♦ Adopt Japan OVAL technology and design
♦ Embedded sensor, 4 piezo-electric crystal encapsulated inside the sensor.
♦ No moving parts, no abrasion, non-wearing parts inside, fully welded SS304 body (SS316 selectable)
♦ Versatile flow meter with detection of steam conditions and best-in-class accuracy.
♦Eliminate drift & vibration influence with patented sensor and flow sensor body.
♦Measure volumetric flow, mass flow with temperature compensation or BTU/energy
♦ Power Requirement: 24 VDC, 15 Watts maximum;
♦ Achieve high accuracy ±0.75%~±1.0% of reading;
♦ 4-20mA, pulse with HART or pulse with RS485 are selectable
♦ Wide temperature range up to highest temperature 350℃
Installation Requirements & Vortex Flow Meter Calibration
| Upstream Straight pipe form | The Straight length of upstream | The Straight length of downstream |
| Concentric tube fully open valve | ≥ 12 DN | ≧ 5 DN |
| Concentric contraction fully open valve | ≥ 15 DN | |
| Single quarter bend | ≥ 20 DN | |
| Two quarter bends on the same surface | ≥ 25 DN | |
| Two quarter bends on the different surface | ≥ 40 DN | |
| Regulating valve、Half-open gate valve | ≥ 50 DN |
Packing & Shipping
● DN15-DN150 standard 3 layers corrugated carbon packing filled with PE foam inside and plastic film wrapped outside, DN200 and above adopt plywood box, all suitable for sea transportation.
● Quantity large than 10 pieces could pack into plywood pallet for easy transportation.
FAQ’s
● What about the delivery time?
Flange connection, we have DIN 16, JIS 10k and ANSI 150# flange standard in stock for all sizes, 5-10 sets could delivery right away in 3-5 working days, qty above 20-30 sets within 7-10 working days.
● What is the guarantee?
We offer 12 months guarantee for flow converter and 18 months guarantee for flow sensor.
● Will you dispatch engineer to install the flow meter?
Yes. we will dispatch engineer to do the service just based on the requirement of customers, but usually for large batch, and usually client do the installation by themselves. As engineer or technicians need pay for their salary.
