Precise Metal Scraper Flowmeter Positive Displacement Flowmeter System

The LBJ Series Metal Scraper Flowmeter is a positive displacement flowmeter. Used for continuous or intermittent precision measurement of liquid flow through pipelines.

The LBJ Series Metal Scraper Flowmeter adopts double shell structure, the rotor rotates at the same speed, with smooth operation, no pulsation, low noise, large flow, sand control, high measurement accuracy, long service life and viscosity change adaptability, widely used in petroleum, chemical, light industry, transportation, commercial and other departments, especially suitable for measuring crude oil, residual oil, refined oil, light hydrocarbons and other media transfer and trade settlement measurement. Flowmeter can be indicated on the spot and can be remote signal output.

Working Principle:

When the measured liquid enters the flow time,the liquid impacts the scraper, pushes the scraper and the rotor to rotate clockwise along the cam, and the scraper expands and expands along a certain track with the cam, and forms an accurate measuring chamber with the rotor, the inner shell, the cover plate, etc., with the continuous rotation of the rotor and the scraper, the purpose of measuring the measured medium is achieved.

Main technical parameters:

Nominal diameter （mm）：25，40，50，80，100，150，200，250，300

Nominal Pressure（MPa）：1.6，2.5，4.0，6.3

Working Temperature （℃）：-20～60，

Environmental temperature（℃）：-41～60（Cast iron material：-15～60）

Accuracy grade ：0.5，0.2

Sender type：Type BGF pulse volume transmitter、BMF analog signal transmitter.

Output ：BGF-I pulse amplitude 0.5～9V；BGF-II pulse amplitude 1～20V；BMF analog signal（4～20mA）.

Supply Voltage：BGF-I  DC12V、BGF-II  DC24；BMF   DC24V.

Flange standard：GB/T9112-2010，or according to user requirements.

Explosion-proof sign：ExdIICT6,ExiaIICT6

Flowmeter appearance and connection:

Machinery installation:

1.The installation position of the flowmeter should try to avoid the environment with large mechanical vibration, high temperature and strong magnetic field interference. And choose the location for easy maintenance installation.

2.Install the flowmeter on the new pipeline, in order to avoid impurities in the pipeline into the flowmeter, you can first replace the flowmeter with a section of pipe, clean the pipe, and then replace the flowmeter.

3.The flowmeter should be installed on the main channel of the horizontal pipeline, and the bypass pipeline should be set up according to the figure below for easy cleaning and maintenance.

4.The arrow direction on the installation flowmeter body should be consistent with the direction of liquid flow. Counter oriented can be adjusted according to user needs.

5.The strainer is installed before the flowmeter is imported. In order to make the measurement accurate, the gas in the pipeline should be excluded, and the gas eliminator should be installed.

6.Flowmeter regulating flow valve should be installed on the downstream side of the flowmeter.

7.Both ends (flanges) of the flowmeter should be concentric with the pipe, and when connected with the flowmeter, the sealing gasket can not burst into the liquid.

Signal Transmission for Liquid Flow Meters:

Reliable Remote Signal Output for Liquid Flow Measurement
Liquid flow meters are widely used in water treatment, chemical dosing, food processing, and industrial pipelines. To meet modern monitoring requirements, liquid flow meters are equipped with multiple signal transmission options for long-distance and real-time data collection.

• 4–20 mA Analog Output: Provides stable and interference-resistant transmission over long distances. Ideal for continuous liquid flow monitoring and integration with PLC and DCS systems.

• Pulse / Frequency Output: Suitable for total flow calculation, batching systems, and water consumption measurement in municipal and industrial applications.

• RS485 with Modbus RTU Protocol: Enables digital communication for accurate remote monitoring. Supports multi-point networking and centralized data acquisition.

• HART Communication (Optional): Allows remote configuration, diagnostics, and calibration without interrupting operation.

Application Value:

• Real-time liquid flow monitoring

• Reduced manual meter reading

• Improved data accuracy and traceability

Automation Capability of Liquid Flow Meters:

Seamless Integration into Automated Liquid Control Systems

Liquid flow meters play a key role in automated process control, especially where precise flow regulation is required.

Fully compatible with PLC systems (Siemens, Schneider, Mitsubishi, Allen-Bradley, etc.)

Supports SCADA and DCS platforms for centralized control and visualization

Enables automatic valve and pump regulation based on real-time flow feedback

Suitable for closed-loop control in dosing, mixing, and filling processes

Automation Benefits:

• Improved process stability

• Reduced operator intervention

• Enhanced production efficiency and repeatability

IoT & Smart Monitoring for Liquid Flow Meters:

Smart Liquid Flow Measurement with IoT Connectivity

IoT-enabled liquid flow meters allow users to monitor liquid flow data anytime and anywhere.

• Wireless Communication Options: NB-IoT, LoRaWAN, Wi-Fi, or Ethernet (depending on configuration)

• Cloud Platform Integration: Flow data is transmitted to cloud servers for real-time access, historical analysis, and reporting.

• Remote Monitoring Dashboard: Displays instant flow rate, cumulative volume, alarm status, and system diagnostics.

• Predictive Maintenance Support: Data analytics help detect abnormal flow patterns, leaks, or blockages early.

IoT Advantages:

• Centralized liquid flow management

• Lower maintenance costs

• Support for smart factories and digital water systems

Welcome to ask us for detailed product manuals.