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Introduction to elbow flowmeter
The LGG series elbow flowmeter belongs to a differential pressure flow measurement system. It is a meter that uses the principle of centrifugal force to generate the flow of the medium in the pipeline when the fluid is moving in a circular motion. It can be used to measure gas, (air, coke oven gas, blast furnace gas and other dry and wet gases) , Steam, liquid and other media. The elbow flowmeter consists of a sensor, a flow totalizer, a differential pressure bender and some pipeline valves. Sensors are divided into L-type sensors and S-type sensors. When flow measurement requires temperature and pressure compensation, pressure transmitters and temperature transmitters should also be equipped.
1.2 Product features: simple structure, no insert throttling parts, no additional resistance loss; good wear resistance, long service life, high accuracy; easy installation, long-term operation and maintenance-free, can be installed by direct welding, no Leakage problems will occur; strong adaptability, wide measurement range, not affected by factors such as on-site high temperature, dust, humidity, electromagnetic field, etc., can work in a complex environment, suitable for measuring dirty gas, and not easy to be blocked; more requirements for straight pipes Low, as long as the first 5D (the inner diameter of the elbow D) and the second 2D can be satisfied, the measurement accuracy can be obtained. The sensor is suitable for a wide range of temperature and pressure: -50~600ºC, 0~30Mpa; large-diameter sensors can be retrofitted online using on-site 90° elbows; expert algorithms in the full range, especially for steam measurement, steam varies with temperature and pressure The superheated steam often transforms into saturated steam, forming a vapor-liquid two-phase flow medium. In the algorithm, the influence of the vapor-liquid two-phase flow medium on the mass flow measurement is compensated, and the measurement accuracy is guaranteed.
2. Technical parameters and functions
Pipe diameter range (mm) DN15~2000 (for the elbow sensor modified on site, there is no pipe diameter limitation) Flow rate range (m/s) liquid 0.1~12
Steam or gas 5~160 measuring medium
Liquid: water, oil, methanol, toluene, liquid ammonia, etc.
Gas: blast furnace gas, coke oven gas, mixed gas, chlorine, hydrogen, oxygen, air, nitrogen, etc.
Steam: saturated steam, superheated steam, accuracy ±1% (temperature and pressure compensation) working environment converter: temperature -10~45ºC, humidity less than 85% (please specify for special circumstances)
Sensor: Temperature -50~600ºC Pressure 0~16MPa (please specify for special circumstances) signal output 4-20mARS-485RS-232 working power supply AC220VAC, 50Hz measurement function display standard condition flow, standard condition cumulative amount, pressure, differential pressure , Temperature, date, time, etc.
3. Selection and classification
3.1 Elbow sensor selection
Bend pipe sensors are divided into L type and S type. The L-type sensor is installed at the 90° natural turn of the on-site pipeline, and the S-type sensor can be installed on a straight pipeline in any space. The connection with the pipeline is welding or flange connection. L-type sensor
Applicable pipe diameter: DN15~4000mm
Bending diameter ratio: R/d 1.0~5.0
Applicable pipe diameter: DN15~4000mm
What are the raw materials used?
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