Introduction:

TM-LUG typeSteam vortex flowmeterIt is a volumetric flowmeter that measures the volumetric flow rate, standard condition volumetric flow rate, or mass flow rate of gases, vapors, or liquids based on the Karman vortex street principle. And it can be used as a flow transmitter in automation control systems.

Scope of use:
TM-LUG typeSteam vortex flowmeterIt can be widely used for measuring the flow of water supply and drainage, industrial circulation, sewage treatment, oil and chemical reagents, compressed air, saturated and superheated steam, natural gas, and various media in large, medium, and small pipelines.

Measurement principle:
TM-LUG typeSteam vortex flowmeterIt is composed of vortex generators designed in the flow field, detection probes, and corresponding electronic circuits. When the fluid flows through a vortex generator, two alternating rows of vortices are formed on both sides, which are called Karman vortex streets. Based on the theory of Karman vortex street, Strohal proposed that the frequency of Karman vortex street is proportional to the flow velocity of the fluid, and gave the relationship between frequency and flow velocity:
In the formula f=St × V/d:
Frequency of vortex street occurrence (Hz)
Average velocity on both sides of the vortex generator (m/s)
St Strohal coefficient (constant)
These alternating vortices form a series of alternating negative pressures, which act on the detection probe to generate a series of alternating electrical signals. After conversion, shaping, and amplification by a preamplifier, the output is a pulse frequency signal (or standard signal) proportional to the synchronization with the vortices.

Steam vortex flowmeterTechnical parameters:
1. Measurement medium: gas, liquid, vapor.
Connection methods: flange card type, flange type, plug-in type.
2. Caliber: The flange card type caliber is selected as 25, 32, 50, 80, and 100, while the flange connection type caliber is selected as 100, 150, and 200.
3. Flow range: Gas 5-50m/s; Liquid 0.5-7m/s (refer to the flow meter range table below).
4. Measurement accuracy: 1.0 level, 1.5 level, 2.5 level.
5. Medium temperature: normal temperature C25 ℃~100 ℃, high temperature C25 ℃~150 ℃ -25 ℃~250 ℃.
6. Output signal: Pulse voltage output signal with high level of 8-10V and low level of 0.7-1.3V, pulse duty cycle of about 50%, transmission distance of 100m, pulse current remote transmission signal of 4-20mA, transmission distance of 1000m.
7. Environmental temperature: -25 ℃~+55 ℃, humidity: 5-90% RH50 ℃.
8. Material: stainless steel, aluminum alloy.
9. Power supply: DC24V or lithium battery 3.6V.
Steam vortex flowmeterThe main characteristics are:
1. No movable parts, long-term stability, simple structure for easy installation and maintenance;
2. Adopting anti-interference circuit and anti vibration sensing head, it has certain anti environmental vibration performance;
3. Adopting ultra-low power single-chip microcomputer technology, one 3.2V10AH lithium battery can be used for more than 5 years;
4. Correction of instrument coefficient nonlinearity by software to improve measurement accuracy;
5. Low pressure loss and wide range of measurement;
6. Using EEPROM for power down protection of accumulated traffic, with a protection time greater than 10 years.

Steam vortex flowmeterInstallation requirements:
1. Can be installed indoors or outdoors. If installed in underground wells and there is a possibility of flooding, submersible sensors or transmitters should be selected.
2. It can be installed horizontally, vertically, or diagonally on the pipeline, but when measuring liquid, the pipeline must be filled with liquid. Therefore, when installing a vortex flowmeter on a vertical or inclined pipeline, the flow direction of the liquid should be from bottom to top.
3. There should be longer straight pipe sections on the upstream and downstream sides, and the length of the straight pipe sections should vary depending on the condition of the pipeline. The upstream of the vortex flowmeter should avoid installing regulating valves or semi open valves as much as possible. The regulating valves or semi open valves should be installed 5D downstream of the flowmeter.
4. The inner diameter of the installation pipeline must be consistent with the inner diameter of the flow meter, otherwise the pipeline must be tapered.
5. When designing pipeline installation, there should be a 500mm space at the upper end of the sensor or transmitter amplifier for easy debugging and maintenance.

Steam vortex flowmeterModel representation:

Precautions for ordering:
Please provide the following conditions when placing an order to assist in selecting the correct specifications and coefficients for the steam vortex flowmeter.
1. Pipeline size: outer diameter x wall thickness (mm);
2. Measurement medium name: medium density [kg/m3];
3. The set maximum flow rate refers to the upper limit of the flow meter's range [kg/h or m3/h];
4. The crime of low flow rate in the process [Kg/h or m3/h];
5. Work pressure (Mpa);
6. Working temperature, (℃).