Ⅰ. Product Features
High precision, good repeatability, wide range ratio, up to 1:20 (or wider);
Adopting an integrated new rectifier, the requirements for the front and rear straight pipe sections are lower (front ≥ 25DN, rear ≥ 3DN);
Adopting a carefully designed and unique dust-proof structure to ensure the long-term reliability of the bearing operation;
A unique refueling system is designed to ensure reliable refueling, easy maintenance, and a beautiful appearance;
The technical specifications meet the requirements of IS09951-1993 standard, the length of the body is 3DN, and the whole machine has reached advanced level;
The volume correction instrument of the flowmeter can rotate freely by about 350 ° and can be easily read in various installation methods;
Low speed, high lifespan, low pressure loss, high precision;
Integrating high-precision temperature, pressure, flow sensors, and volume correction instruments, it can detect the temperature, pressure, and flow of the measured gas, and perform automatic flow tracking compensation and compression correction calculation. The instrument comes with a real-time database, which facilitates centralized data collection and real-time management through RS485 communication interface and meter reading network;
Adopting high-performance microprocessors and modern digital filtering technology, the software has powerful functions and superior performance;
Adopting floating-point operations and automatic correction of five segment instrument coefficients, with fault self diagnosis and alarm functions;
Adopting low-power high-tech, internal and external power supply for operation, the whole machine has low power consumption;
■ Display the flow value locally and have multiple signal output functions;
Adopting a high contrast three row LCD display, it can display standard cumulative flow rate, standard volume flow rate, operating condition volume flow rate, medium temperature, pressure value, and battery capacity percentage, with a Chinese prompt;
■ It has real-time data storage function, which can prevent data loss in case of battery replacement or sudden drop. In case of power outage, internal parameters can be saved;
The instrument has explosion-proof function and the explosion-proof mark is ExdIICT6;
Ⅱ. Working principle
When the fluid passes through the flowmeter, it is rectified and accelerated by the leading fluid (or rectifier). Due to the angle between the blades and the fluid flow direction, the turbine generates a rotational torque. After overcoming the friction torque and fluid resistance torque, the turbine begins to rotate. Within a certain flow range, the angular velocity of the turbine rotation is proportional to the volume flow rate of the fluid. According to the principle of electromagnetic induction, a magnetic sensor is used to induce a pulse signal proportional to the volume flow rate of the fluid from the synchronously rotating transmission disk. This signal is sent to the volume correction instrument and processed together with temperature, pressure and other signals for calculation and display on the LCD screen. The structural principle is shown in Figure 1

4.2 Working principle of volume correction instrument
The volume correction instrument consists of temperature and pressure detection analog channels, flow detection digital channels, as well as a microprocessor unit, liquid crystal drive circuit, and other auxiliary circuits. It is equipped with an external signal interface. The multi-channel signals sent from each sensor are converted and processed by the microprocessor according to the gas equation into the formula for calculation, achieving local display and remote transmission of multiple signals.

Ⅲ. CLASSIFICATION
LWGQ series classified by instrument functionDN50 gas turbine flowmeterIt can be divided into two categories: 1. LWGQ gas turbine flowmeter, 1. LWGZ gas turbine flowmeter.
2. LWGQ type gas turbine flowmeter

(1) Product Overview
The LWGQ gas turbine flowmeter integrates a turbine flow sensor and a flow integrator.
It can measure gas temperature and pressure, operating flow rate, standard flow rate, and total amount, and can be used for gas flow and volume measurement and detection in industrial industries such as petroleum, chemical, power, and metallurgy.
(2) Product Features
Integrating a flow sensor and a volume correction instrument, it can automatically track and correct the temperature, pressure, and compression factor of the measured gas, directly detecting or measuring the standard volume flow rate and total amount of the gas.
Adopting imported instrument precision bearings, high accuracy, and good stability.
The carefully designed flow channel structure avoids the flow of air between the bearings and improves the medium adaptability of the lubrication wheel flowmeter.
The unique reverse thrust structure and sealing structure design ensure the long-term reliable operation of the bearing.
The use of magnetic resistance sensors has the advantages of high sensitivity, good reliability, and low starting flow rate.
Independent movement design, good interchangeability and easy maintenance.
Design a rectifier with excellent rectification performance, with low requirements for the front and rear straight pipe sections.
A network communication system is formed through the RS 485 communication interface, which facilitates automated management. The RS485 communication protocol complies with the MODBUS specification.
The correction device can rotate freely at 350 ° and is easy to install.
2. LWGZ type gas turbine flowmeter

product overview
LWGZ typeDN50 gas turbine flowmeterIt integrates a gas turbine flow sensor and an electronic volume correction instrument, which can detect and display the working condition flow rate and total amount. Its technical performance is at the advanced level in China and meets the GB/T18940/ISO9951 standard. It is widely used in gas measurement and detection in industries such as steam compressed air.
Ⅳ. Product Selection

Ⅴ. External dimensions
The external dimensions of the flowmeter are shown in Figures 3 and 4. The dimensions not indicated in the figures are listed in Table 3. The flowmeter is connected by flange.


Ⅵ. install
There should be no strong external magnetic field interference or strong mechanical vibration around the flowmeter. Before installation, the environmental conditions should be reviewed according to its usage requirements for normal use;
Flowmeters should not be used in situations where there are frequent changes in flow rate, strong pulsating flow, or pressure pulsation;
When installing the flowmeter outdoors, there should be a cover on the upper part to prevent rainwater from entering and direct sunlight from affecting the service life of the flowmeter;
The flowmeter is suitable for horizontal installation, and the direction of fluid flow is consistent with the direction indicated on the housing; And there should be straight pipe lengths of 5DN and 3DN respectively upstream and downstream of the flowmeter;
In order not to affect the normal transportation of fluid, a bypass pipeline can be installed according to Figure 5, and the bypass pipeline valve must be locked during normal use;

A filter of the corresponding specification must be installed upstream of the flow meter (25DN) (our company can provide matching);
When installing flow meters and measuring pipelines, consideration should be given to installing expansion pipes or corrugated pipes, and according to the actual size of the flow meter, the upstream and downstream pipelines should be laid reasonably to prevent deformation of the flow meter caused by pipeline stress;
The flowmeter should be installed coaxially with the pipeline and prevent sealing gaskets and grease from entering the interior of the pipeline;
The flowmeter must be reliably grounded, but must not share the ground wire with the high-voltage system; During pipeline installation or maintenance, the grounding wire of the welding system shall not be overlapped with the flow meter;
During use, users are not allowed to change the connection method of the explosion-proof system or make arbitrary changes. Each lead interface should be operated strictly in accordance with the relevant requirements of GB3836.12 when necessary;
When the flowmeter is put into operation, the valve should be slowly opened (opening time not less than 15 seconds), gradually increasing the flow rate to avoid instantaneous airflow impact and damage to the turbine.