ATWY Flange Liquid Turbine Flowmeter from China Manufacturer

Introduction Features Specifications Model Selection Application Installation

Introduction

Turbine flowmeter working principle: Fluid flows through the sensor shell, because the blade of the impeller has a certain Angle with the flow direction, the impulse force of the fluid makes the blade have a rotational torque, and after overcoming the friction torque and fluid resistance, the blade rotates, and the rotational speed is stable after the torque is balanced. Under certain conditions, the rotational speed is proportional to the velocity. It is in the magnetic field of the signal detector (composed of magnetic steel and coil), the rotating blade cuts the magnetic field line, and periodically changes the magnetic flux of the coil, so that both ends of the coil are induced by the electrical pulse signal, the signal is amplified by the amplifier, forming a continuous rectangular pulse wave with a certain amplitude, which can be transmitted to the remote display instrument, showing the instantaneous flow and cumulative amount of fluid.

Turbine flowmeter is a kind of speed instrument, which has the advantages of high precision, good repeatability, simple structure, high pressure resistance, wide measuring range, small size, light weight, small pressure loss, long life, simple operation, easy maintenance, etc., used to measure the volume flow and accumulation of low viscosity, no strong corrosion and clean liquid in closed pipelines. It can be widely used in petroleum, chemical industry, metallurgy, organic liquid, inorganic liquid, liquefied gas, urban gas pipe network, pharmaceutical, food, paper and other industries.

Features

High accuracy, generally up to ±1%R, ±0.5%R, high-precision up to ±0.2%R; (R stands for reading error)

Good repeatability, short-term repeatability can reach 0.05% ~ 0.2%, it is because of good repeatability, such as frequent calibration or online calibration can get very high accuracy, is the preferred flowmeter in trade settlement;

Output pulse frequency signal, suitable for total measurement and computer connection, no zero drift, strong anti-interference ability;

Original pulse frequency range (10Hz ~ 1.5KHz), strong signal resolution;

Measuring range ratio,10:1~20:1;

Compact and light structure, easy installation and maintenance, large circulation capacity;

Suitable for high pressure measurement, no need to open holes on the sensor body, easy to make high pressure instrument;

Can be made into insert type, suitable for large diameter measurement, pressure loss is small, low price, can not be cut out, easy installation and maintenance.

Specifications

Executive standard	Turbine flow sensor（JB/T9246-1999）
Connection mode	Thread, clamp, flange, clamp type
Accuracy	±1%R、±0.5%R、±0.2%R (to be customized)
Sensor material	304, 316 stainless steel, etc
Use conditions	Medium temperature：-20℃～+120℃ Ambient temperature：-20℃～+60℃
Use conditions	Relative humidity：5%-90% Atmospheric pressure：86Kpa～106Kpa
Signal output function	Pulse signal, 4-20mA signal
Communication output function	RS485 communication, HART protocol, etc
Working power supply	External power supply: 24VDC±15%, ripple ≤±5%, suitable for 4-20mA output, pulse output, RS485, etc
Working power supply	Internal power supply: 1 set of 3.6V10AH lithium battery, the battery voltage can work normally at 2.0-3.0V
Signal line interface	Basic model: Hausmann connector or three-core cable; Explosion-proof type, internal thread M20*1.5
Explosion-proof class	Exia II CT or Exd II BT6
Protection class	IP65 or higher customizable

Model Selection

Measure the medium, temperature, whether there is corrosion

Flow range and inside diameter of user pipe

Pressure rating

Whether to show on site

Working power supply

Signal output, communication

Whether to explosion-proof

Installation mode

Accuracy

Application

Industrial process

Energy measurement

Environmental protection engineering

Transportation

Biotechnology

Scientific experiment

Marine meteorology

Rivers and lakes

Installation

In order to ensure the accuracy of the measurement of the turbine flowmeter, the installation position and method must be correctly selected

1.Requirements for the straight pipe section: The flowmeter must be installed horizontally on the pipeline (the inclination of the pipeline is within 5), and the flowmeter axis should be concentric with the pipeline axis when installed, and the flow direction should be consistent. The length of the upstream pipe of the flow meter should be not less than 2D equal straight pipe section, if the installation site is sufficient, it is recommended that the upstream straight pipe section is 20D and the downstream is 5D.

2.Requirements for piping: The inner diameter of the upstream and downstream piping at the installation point of the flowmeter is the same as the inner diameter of the flowmeter.

3.Requirements for bypass pipes: In order to ensure that the normal use of the medium is not affected when the flow meter is repaired, a cut-off valve (stop valve) should be installed on the front and back pipes of the flow meter, and a bypass pipe should be set up. The flow control valve should be installed in the downstream of the flow meter, and the stop valve installed in the upstream when the flow meter is used must be fully opened to avoid the unsteady flow of the upstream part of the fluid.

4.Requirements for the external environment: When the flow meter is installed indoors, it must be installed outdoors, and it must use sun protection and rain protection. Lightning protection measures to avoid affecting the service life.

5.Requirements for impurities in the medium: In order to ensure the service life of the flow meter, a filter should be installed in front of the straight pipe section of the flow meter.

6.Installation location: The flowmeter should be installed in a place that is easy to maintain and free from strong electromagnetic interference and thermal radiation

7.Requirements for installation and welding: The user has another pair of standard flanges welded on the front and back pipes. Welding with flow meter not allowed! Before installing the flow meter, the welding slag and other dirt in the pipe should be strictly removed, and the pipe of equal diameter (or by-pass pipe) should be used to replace the flow meter for purging the pipe. To ensure that the flow meter is not damaged during use. Installation flow time, flange between the sealing gasket can not be concave into the pipeline.

8.Flowmeter grounding requirements: the flowmeter should be reliably grounded and cannot be shared with the ground wire of the strong current system.

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