Pipeline type LDG electromagnetic flowmeter LDG-400 large-diameter electromagnetic flowmeter

Description :

　　This product is not only suitable for general process testing, but also for measuring slurry, paper pulp, and paste like liquids. It is widely used in industries such as petroleum, chemical, steel, food, electricity, papermaking, water conservancy and drainage, water administration and water resources.

　　1、 Selection guide:

　　Caliber selection

　　The diameter of the flowmeter should be the same as that of the process pipeline. If in the following two situations:

　　① The flow rate inside the pipeline is too low to meet the flow meter's requirements for the flow rate range or to achieve high measurement accuracy at this flow rate.

　　② The medium is prone to adhere to the pipe wall, which affects the normal use of the flowmeter.

　　You can choose a flow meter with a diameter smaller than the process pipeline, but you need to do a good job of reducing the diameter.

　　2、 Structural form:

　　1. Sensor:

　　This product mainly consists of a measuring catheter, measuring electrode, excitation coil, iron core, magnetic yoke, and housing.

　　a、 Measurement catheter: composed of stainless steel catheter, lining, and connecting flange, it is a carrier for measuring the on-site working conditions of the measured liquid.

　　b、 Measurement electrode: a pair of electrodes installed on the inner wall of the measurement catheter, perpendicular to the axial flow direction, to generate signals for the measured liquid.

　　c、 Excitation coil: The upper and lower excitation coils that generate a magnetic field inside the measuring conduit.

　　d、 Iron core and magnetic yoke: Introduce the magnetic field generated by the excitation coil into the liquid and form a magnetic circuit.

　　e、 Shell: Instrument outer packaging.

　　2. Converter:

　　It is an intelligent secondary meter that amplifies and processes flow signals. After calculation by the microcontroller, it can display flow rate, cumulative measurement, and output signals such as pulses and analog currents for measuring or controlling fluid flow rate.

　　3. Product assembly form:

　　It is divided into two forms: one-piece and split type.

　　a、 Integrated: The sensor and converter are installed together.

　　b、 Split type: Sensors and converters are installed separately, forming a flow metering system through connecting cables.

　　c、 To meet the requirements of measuring different media, there are multiple choices for the lining and electrode materials of sensors.

　　3、 Installation requirements:

　　1. Sensors can be installed on both straight and horizontal or inclined pipelines, but the centerline of the two electrodes must be in a horizontal state.

　　2. The medium should flow fully in the installation position to avoid incomplete pipes and gas adhesion to the electrodes.

　　3. For liquid-solid two-phase fluids, vertical installation is adopted to ensure uniform wear of the sensor lining and extend its service life.

　　4. When the installation position of the flowmeter is not filled with the medium, the method of raising the flow half rear pipeline can be adopted to fill the pipeline. It is strictly prohibited to install the flowmeter at the highest point and outlet of the pipeline.

　　5. Modify the installation method of the pipeline: When the medium flow rate does not meet the requirements, a smaller diameter flowmeter should be used. At this time, a reducing cone tube or modified part of the pipeline should be used to make it the same diameter as the sensor. However, the front and rear straight pipe sections must at least meet the following requirements: the front straight pipe section must be ≥ 5DN, and the rear straight pipe section must be ≥ 2DN (DN is the pipe diameter).

　　6. The front and rear straight pipe sections are flow meters with a front diameter of ≥ 5DN and a rear diameter of ≥ 2DN.

AfterSalesService :

• Pipeline type LDG electromagnetic flowmeter