LWGY-A/B/C series turbine flowmeterDetailed product description：

1、 Overview
The LWGY (JG109) series turbine flowmeter is a new generation of turbine flowmeter that has been optimized and designed based on advanced technology of flow meters at home and abroad. It has the characteristics of simple structure, lightweight, high accuracy, good reproducibility, sensitive response, and easy installation, maintenance, and use. It is widely used to measure liquids in closed pipelines that do not corrode stainless steel 1Cr18Ni9Ti, 2Cr13, corundum AI2O3, and hard alloys, and have no impurities such as fibers or particles. The liquid with a kinematic viscosity of less than 5 × 10-6m2/s at working temperature can be used after real liquid calibration of the flowmeter for liquids with a kinematic viscosity greater than 5 × 10-6m2/s If paired with display instruments with special functions, it can also perform quantitative control, over limit alarm, etc., making it an ideal instrument for flow measurement and energy conservation

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

3、 Instrument classification
According to the classification of instrument functions, the LWGY series turbine flowmeter can be divided into two categories, namely:
Turbine flow sensor/transmitter
Intelligent integrated turbine flowmeter
2. Function Description
Turbine flow sensor/transmitter

The LWGY-A/B/C series turbine flowmeter products themselves do not have on-site display function and only transmit and output flow signals remotely. Flow signals can be divided into pulse signals or current signals (4-20mA); The instrument is inexpensive, highly integrated, and compact in size, making it particularly suitable for use with computer control systems such as secondary displays, PLCs, and DCS.
This type of turbine flow product is divided into two types: basic type and explosion-proof type (ExdIIBT6), as shown in the diagram


Figure 1 Basic type sensor/transmitter Figure 2 Explosion proof type sensor/transmitter

According to different output signals, this type of product can be divided into LWGY - □ N type and LWGY - □ A type
LWGY - □ N type sensor: powered by 12-24VDC, three wire pulse output, high level ≥ 8V, low level ≤ 0.8V; signal transmission distance ≤ 1000 meters;
LWGY - □ A type transmitter: 24VDC power supply, two-wire 4-20mA output, signal transmission distance ≤ 1000.

Intelligent integrated turbine flowmeter



Figure 3 Intelligent integrated turbine flowmeter

A new intelligent instrument integrating turbine flow sensor and display integration developed using advanced ultra-low power single-chip microcomputer technology, with dual row LCD on-site display, has obvious advantages such as compact structure, intuitive and clear reading, high reliability, no external power interference, lightning resistance, and low cost. The instrument has three-point correction of instrument coefficient, intelligent compensation of instrument coefficient nonlinearity, and can be corrected on site. The high-definition LCD display simultaneously displays instantaneous flow rate (4 significant digits) and cumulative flow rate (8 significant digits, with reset function). Keep all valid data intact for 10 years after power failure. This type of turbine flowmeter is an explosion-proof product with an explosion-proof rating of ExdIIBT6.

This type of turbine flowmeter can be divided into LWGY - □ B type and LWGY - □ C type according to the power supply method and whether it has remote signal output.
LWGY - □ B type: The power supply uses a 3.2V10AH lithium battery (which can operate continuously for more than 4 years); No signal output function.
LWGY - □ C type: The power supply adopts 24VDC external power supply, outputs 4-20mA standard two-wire current signal, and can add RS485 or HART communication according to different on-site needs.
Technical parameters

1. Basic parameters: Table 1

Instrument diameter (mm) and connection method accuracy class turndown ratio Instrument material Temperature of the tested medium (℃) environmental conditions output signal power supply Signal transmission line transmission distance Signal line interface Explosion-proof rating Protection level

4. 6, 10, 15, 20, 25, 32, 40 are connected by threads (15, 20, 25, 32, 40) 50, 65, 80, 100, 125, 150, 200 are connected by flanges ± 1% R, ± 0.5% R, ± 0.2% R (to be customized) 1:10:1:15:1:20 304 stainless steel, 316 (L) stainless steel, etc -20～＋120℃ Temperature -10~+55 ℃, relative humidity 5%~90%, atmospheric pressure 86~106Kpa Sensor: Pulse frequency signal, low level ≤ 0.8V, high level ≥ 8V Transmitter: two-wire 4-20mADC current signal Sensor:+12VDC,+24VDC (optional) Transmitter:+24VDC On site display type: The instrument comes with a 3.2V lithium battery or+24VDC external power supply STVPV3 × 0.3 (three wire system), 2 × 0.3 (two wire system) ≤1000m Basic type: Hausman connector or self-contained three core cable; Explosion proof type: Internal thread M20 × 1.5 Basic type: non explosion proof product; Explosion proof type: ExdIIBT6 IP65

2. Measurement range and working pressure
Table 2

Instrument caliber （mm）	Normal flow range （m3/h）	Expand traffic range （m3/h）	Conventional connection method Compared to the withstand voltage level	Specially designed pressure resistance level (MPa) (with diameter flange connection method)
DN 4	0.04～0.25	0.04～0.4	Threaded connection/6.3MPa	10. 16, 25
DN 6	0.1～0.6	0.06～0.6	Threaded connection/6.3MPa	10. 16, 25
DN 10	0.2～1.2	0.15～1.5	Threaded connection/6.3MPa	10. 16, 25
DN 15	0.6～6	0.4～8	Threaded connection/6.3MPa	4.0, 6.3, 12, 16, 25
			flange connection
DN 20	0.8～8	0.45～9	Threaded connection/6.3MPa	4.0, 6.3, 12, 16, 25
			flange connection
DN 25	1~10	0.5～10	Threaded connection/6.3MPa	4.0, 6.3, 12, 16, 25
			Flange connection/2.5MPa
DN 32	1.5～15	0.8～15	Threaded connection/6.3MPa	4.0, 6.3, 12, 16, 25
			Flange connection/2.5MPa
DN 40	2~20	1~20	Threaded connection/6.3MPa	4.0, 6.3, 12, 16, 25
			Flange connection/2.5MPa
DN 50	4~40	2~40	Flange connection/2.5MPa	4.0, 6.3, 12, 16, 25
DN 65	7~70	4~70	Flange connection/2.5MPa	4.0, 6.3, 12, 16, 25
DN 80	10~100	5~100	Flange connection/2.5MPa	4.0, 6.3, 12, 16, 25
DN 100	20~200	10~200	Flange connection/2.5MPa	4.0, 6.3, 12, 16, 25
DN 125	25~250	13~250	Flange connection/1.6MPa	2.5, 4.0, 6.3, 12, 16
DN 150	30~300	15~300	Flange connection/1.6MPa	2.5, 4.0, 6.3, 12, 16
DN 200	80~800	40~800	Flange connection/1.6MPa	2.5, 4.0, 6.3, 12, 16

Selection of LWGY-A/B/C series turbine flow meters
Table 3

model								explanation
LWGY─	□	/□	/□	/□	/□	/□	/□
nominal path	four							4mm
	six							6mm
	ten							10mm
	fifteen							15mm
	twenty							20mm
	twenty-five							25mm
	thirty-two							32mm
	forty							40mm
	fifty							50mm
	sixty-five							65mm
	eighty							80mm
	one hundred							100mm
	one hundred and twenty-five							125mm
	one hundred and fifty							150mm
	two hundred							200mm
Type		N						Sensor type:+12V or 24V power supply, output three wire pulse signal
		A						Transmitter type:+24V power supply, output two-wire 4-20mA
		B						Intelligent type: Powered by lithium batteries, no signal output displayed on site
		C						Intelligent type:+24V power supply, on-site display and output of two-wire 4-20mA
		C1						Intelligent type:+24V power supply, on-site display and equipped with RS485 communication protocol
		C2						Intelligent type:+24V power supply, on-site display with HART communication protocol
accuracy class			05					Level 0.5
			ten					Level 1.0
			02					0.2 level (negotiated ordering, longer production cycle)
Turbine Type				W				Expand measurement range
				S				Standard measurement range
material					S			304 stainless steel
					L			316 (L) stainless steel
Explosion proof						N		Non explosion proof type
						E		Explosion proof type, Exd Ⅱ BT6
pressure rating							N	Conventional (refer to Table 2)
							H(x)	High voltage (refer to Table 2)

Note: DN15 to DN40 are usually threaded connections. If you wish to use flange connections, please add "(FL)" after "nominal diameter"
For example, a flange connected explosion-proof turbine flowmeter is selected to measure diesel fuel. The pipeline is DN40, and the current signal needs to be displayed and transmitted remotely on site. The accuracy is required to be level 0.5, made of 304 stainless steel, and the instrument has a pressure resistance of 16MPa. The measurement range is the standard range, and the product model should be LWGY-40 (FL)/C/05/S/E/H16

installation dimensions

The installation method of sensors varies depending on the specifications, using threaded or flange connections. The installation methods are shown in Figure 6, Figure 7, and Figure 8, and the installation dimensions are shown in Table 4.

Figure 6



Figure 7 and Figure 8

Figure 4: DN4 to DN10
Dimensional drawing of threaded connection type turbine flow sensor (including straight pipe section)
Figure 5: DN15 to DN40
Dimensional drawing of threaded connection type turbine flow sensor
Figure 6: DN15 to DN200
Dimensional drawing of flange connected turbine flow sensor

Nominal diameter (mm)	L(mm)	G	D(mm)	d(mm)	number of holes
four	two hundred and ninety-five	G1/2
six	three hundred and thirty	G1/2
ten	four hundred and fifty	G1/2
fifteen	seventy-five	G1	Ф65	Ф14	four
twenty	eighty	G1	Ф75	Ф14	four
twenty-five	one hundred	G5/4	Ф85	Ф14	four
thirty-two	one hundred and forty	G2	Ф100	Ф14	four
forty	one hundred and forty	G2	Ф110	Ф18	four
fifty	one hundred and fifty		Ф125	Ф18	four
sixty-five	one hundred and seventy		Ф145	Ф18	four
eighty	two hundred		Ф160	Ф18	eight
one hundred	two hundred and twenty		Ф180	Ф18	eight
one hundred and twenty-five	two hundred and fifty		Ф210	Ф25	eight
one hundred and fifty	three hundred		Ф250	Ф25	eight
two hundred	three hundred and sixty		Ф295	Ф23	twelve

LWGY-A/B/C series turbine flowmeter