1. Liquid medicine meterHigh precision, generally up to ± 1% R, ± 0.5% R, and high-precision models up to ± 0.2% R;
2. Good repeatability, short-term repeatability can reach 0.05% to 0.2%. It is precisely because of its good repeatability that high accuracy can be achieved through regular calibration or online calibration,
3. Flow meters are the preferred choice in trade settlement;
4. Output pulse frequency signal, suitable for total measurement and computer connection, no zero drift, strong anti-interference ability;
5. High frequency signals (3-4 kHz) can be obtained, with strong signal resolution;
6. Range measurement, with a medium to large caliber of up to 1:20 and a small caliber of 1:10;
7. Compact and lightweight structure, easy installation and maintenance, and high circulation capacity;
8. Suitable for high voltage measurement, there is no need to open holes on the instrument body, making it easy to make high voltage instruments;
9. There are various types of specialized sensors that can be designed according to the specific needs of users, such as low-temperature, bidirectional, downhole, sand mixing, etc
10. Can be made into an insertion type, suitable for large-diameter measurement, with low pressure loss, low price, can be removed without interruption, and easy installation and maintenance

• Liquid medicine meterLWGYTechnical Parameter

Execution standards	Turbine flow sensor (JB/T9246-1999)
Instrument diameter (mm) and connection method	4. Threaded connections are used for 6, 10, 15, 20, 25, 32, 40, 50, 65, and 80
Accuracy level	± 1% R, ± 0.5% R, ± 0.2% R (to be customized)
Range ratio	1:10；1:15；1:20
Sensor material	304 stainless steel, 316 (L) stainless steel, etc
Usage conditions	Medium temperature: -20 ℃~+120 ℃ Environmental temperature:- 20℃～+60℃ 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 Internal power supply: 1 set of 3.0V10AH lithium batteries, which can work normally when the battery voltage is between 2.0V and 3.0V.
Signal line interface	Basic type: Hausman connector or self-contained three core cable; Explosion proof type: Internal thread M20 * 1.5
Explosion proof grade	ExiaICIT4 or ExdIIBT6
Protection level	IP65 or higher (customizable)

Model								Remarks
LWGY─	□	/□	/□	/□	/□	/□	/□
state-owned call open up or clear out by poking or jabbing footpath	4	*	*	*	*	*	*	4mm, standard range 0.04-0.25m3/h, wide range 0.04-0.4m3/h
	6							6mm, standard range 0.1-0.6m3/h, wide measuring wheel 0.06-0.6m3/h
	10							10mm, standard range 0.2-1.2m3/h, wide range 0.15-1.5m3/h
	15							15mm, standard range 0.6-6m3/h, wide range 0.4-8m3/h
	20							20mm, standard range 0.8-8m3/h, wide range 0.4-8m3/h
	25							25mm, standard range 1-10m3/h, wide range 0.5-10m3/h
	32							32mm, standard range of 1.5-15m3/h, wide range of 0.8-15m3/h
	40							40mm, standard range 2-20m3/h, wide range 1-20m3/h
	50							50mm, standard range of 4-40m3/h, wide range of 2-40m3/h
	65							65mm, standard range of 7-70m3/h, wide range of 4-70m3/h
	80							80mm, standard range 10-100m3/h, wide range 5-100m3/h
	100							100mm, standard range of 20-200m3/h, wide range of 10-200m3/h
	125							125mm, standard range of 25-250m3/h, wide range of 13-250m3/h
	150							150mm, standard range of 30-300m3/h, wide range of 15-300m3/h
	200							200mm, standard range of 80-800m3/h, wide range of 40-800m3/h
type		B						Battery powered on-site display type
		C						On site display: 4-20mA two-wire current output
		C1						On site display/RS485 communication protocol
		C2						On site display/ART communication protocol
accuracy class			05					Accuracy level 0.5
			10					Accuracy level 1.0
turbine type				W				Wide range turbine
				S				Standard turbine
material					S			304 stainless steel
					L			316 (L) stainless steel
explosion-proof						E		Explosion proof type (explosion-proof grade: Exd Ⅱ BT6)
pressure rating							N	convention
							H(x)	high pressure

Note: DN15 to DN40 are usually threaded connections. If you wish to use flange connections, please add "(FL)" after "nominal diameter"
Attention Editor
model selection
The correct selection of turbine flowmeter is necessary to ensure better use of turbine flowmeter. What type of turbine flowmeter should be selected based on the physical and chemical properties of the measured fluid medium? What are the diameter, flow range, lining material, electrode material, and output current of the turbine flowmeter? Can adapt to the properties of the measured fluid and the requirements of flow measurement.
1. Precision functional inspection
The accuracy level and function of the instrument are selected based on measurement requirements and usage scenarios to achieve cost-effectiveness. For example, in situations such as trade settlement, product handover, and energy measurement, higher accuracy levels such as 1.0, 0.5, or higher should be selected; For process control applications, choose different accuracy levels according to control requirements; In some cases where only the process flow rate needs to be detected without precise control and measurement, a slightly lower accuracy level, such as 1.5, 2.5, or even 4.0, can be selected. In this case, a low-cost plug-in turbine flowmeter can be used.
2. Measurable medium
When measuring medium flow rate, instrument range, and caliber for general medium measurement, the full flow rate of the turbine flowmeter can be selected within the range of 0.5-12m/s for measuring medium flow rate, which is relatively wide. The selection of instrument specifications (caliber) may not necessarily be the same as the process pipeline, and should be determined based on whether the measured flow range is within the flow rate range. That is, when the pipeline flow rate is too low to meet the requirements of the flow instrument or the measurement accuracy cannot be guaranteed at this flow rate, the instrument port diameter needs to be reduced to increase the flow rate inside the pipeline and obtain satisfactory measurement results.
install
In order to ensure the accuracy of the measurement of the turbine flowmeter, it is necessary to correctly select the installation position and method
Requirements for straight pipe section: The flowmeter must be installed horizontally on the pipeline (with a pipeline inclination of less than 5), and the axis of the flowmeter should be concentric with the axis of the pipeline during installation, with the flow direction consistent. The upstream pipeline length of the flowmeter should have an equal diameter straight pipe section of not less than 2D. If the installation site permits, it is recommended that the upstream straight pipe section be 20D and the downstream be 5D.
Requirements for piping: The inner diameter of the upstream and downstream piping at the flowmeter installation point should be the same as the inner diameter of the flowmeter.
Requirements for bypass pipe: In order to ensure that the maintenance of the flowmeter does not affect the normal use of the medium, shut-off valves (globe valves) should be installed on the front and rear pipelines of the flowmeter, and a bypass pipe should also be installed. The flow control valve should be installed downstream of the flowmeter. When using the flowmeter, the upstream shut-off valve must be fully opened to avoid unstable flow of fluid in the upstream section.
Requirements for external environment: It is best to install the flowmeter indoors. If it must be installed outdoors, it must be protected from sunlight and rain Lightning protection measures should be taken to avoid affecting the service life.
Requirement for impurities in the medium: In order to ensure the service life of the flowmeter, a filter should be installed before the straight pipe section of the flowmeter.
Installation location: The flowmeter should be installed in a location that is easy to maintain, free from strong electromagnetic interference and thermal radiation
Requirements for installation welding: The user shall provide another pair of standard flanges to be welded onto the front and rear pipelines. Welding with flow meters is not allowed! Before installing the flow meter, welding slag and other dirt in the pipeline should be strictly removed. It is best to use an equal diameter pipeline (or bypass pipe) instead of the flow meter to blow the pipeline. To ensure that the flow meter is not damaged during use. When installing a flowmeter, the sealing gasket between the flanges should not be recessed into the pipeline.
Requirements for flowmeter grounding: The flowmeter should be reliably grounded and cannot be shared with the grounding wire of the high-voltage system.
Requirements for explosion-proof products: In order to ensure the safe and normal use of the instrument, the usage environment of the explosion-proof flowmeter should be reviewed to ensure compliance with the user's explosion-proof requirements. During installation and use, strict adherence to the national requirements for the use of explosion-proof products is required. Users are not allowed to change the connection method of the explosion-proof system or open the instrument at will. Select within the specified flow range to prevent overspeed operation, ensuring ideal accuracy and normal service life. Before installing the flowmeter, the pipeline should be cleaned of debris such as fragments, welding slag, stones, dust, etc. It is recommended to install a 5-micron sieve filter upstream to block liquid droplets and sand particles. When the flowmeter is put into operation, the front valve should be slowly opened first, and then the rear valve should be opened to prevent instantaneous airflow impact and damage to the turbine. Lubricating oil should be added according to the signs, and the frequency of refueling depends on the cleanliness of the gas, usually 2-3 times a year. Due to pressure testing
Conducting thermal balance tests on industrial furnaces is undoubtedly of great economic benefit in terms of understanding the utilization of thermal energy in industrial furnaces, improving product quality, saving energy and reducing costs for enterprises. In the actual testing process, turbine flowmeter is the first choice in industrial boiler thermal balance testing due to its high accuracy, wide measurement range, high pressure resistance, and digital signal output. This article discusses and summarizes several issues related to the use of turbine flow meters in industrial boiler thermal balance testing.
In the actual situation of industrial boilers, due to various constraints, the water supply of industrial boilers is generally an intermittent water supply method that varies with time load. This method determines the flow of fluid in the main pipeline of the boiler water supply, that is, the flow of water supply is usually characterized by turbulent flow, that is, the water flow in the pipeline of industrial boilers is irregular and mixed with each other while flowing. Accurately measuring the water supply flow rate and temperature of industrial boilers is crucial for correctly analyzing the results of thermal balance tests. Turbine flow meters can accurately and timely respond to turbulent changes in water flow precisely because they have digital signal output and corresponding sensitivity. Within a time period, the flow rate of the water supply pipeline of an industrial boiler is the integral of the pipeline cross-sectional area F, that is, Q=∫ FVDF, while other principle flow meters are difficult to achieve the high accuracy of turbine flow meters.