High Precision New Generation Of Liquid Turbine Flow Meter

This series of turbine flowmeters is a new generation of turbine flowmeters, which absorbs the advanced technology of domestic and foreign flowmeters and is manufactured in accordance with jb/9246-199 standard.It is characterized by simple structure, light weight, high precision, good reproducibility, strong responsiveness and convenient installation and maintenance.



Features

■High precision, generally up to ±1%R, ±0.5%R, and high precision type can be up to ±0.2%R;

■Good repeatability with short-term repeatability of 0.05%-0.2%. Due to good repeatability, such as frequent calibration or online calibration, it can get very high precision,which is the preferred flow meter in trade settlement;

■ Output pulse frequency signal, it is suitable for total metering and connected with computer, without zero drift, and with strong anti-interference ability;

■It can obtainHigh frequency signal (3~4kHz) with strong signal resolution;

■ The range of medium and large caliber can reach 1:20, and the range of small caliber is 1:10;

■It has the characteristics of compact structure, light weight, convenient installation and maintenance, and large circulation capacity;

■It is suitable for high-pressure measurement, no need to open holes on the meter body, easy to make high-pressure type instrument;

■ It has many special sensor types, which can be designed into various types of special sensors according to the special needs of users, such as low temperature type, two-way type, downhole type, sand mixing type, etc.

■It can be made into plug-in type, suitable for large caliber measurement, with low pressure loss, low price, continuous flow, and easy installation and maintenance.


Meter classification

According to the meter function, LWGY series turbine flowmeter can be divided into 2 categories, namely: (1) turbine flow sensor / transmitter (2) intelligent display turbine flowmeter

(1) Turbine flow sensor / transmitter

This type of turbine flow product itself does not have  function of on-site display, only  transmitte the flow signal far. The flow signal can be divided into pulse signal or current signal (4-20mA). The meter price is low, with high integration, and small volume,which is especially suitable for use with computer control systems such as secondary display, PLC and DCS.

According to different output signals, these products can be divided into LWGY-□ N-type and LWGY-□ A-type.

LWGY- N-type sensor: 24VDC power supply, three-wire pulse output, high level ≥8V, low level ≤0.8V; signal transmission distance is ≤1000 meters;

LWGY-□A type transmitter: 24VDC power supply, 2-wire 4-20mA output, signal transmission distance ≤1000.

This type of turbine flow products are divided into basic type and explosion-proof type (Exdiict 6), and the shape is as shown in (Fig.1)(Fig.2).

Various types of flowmeters

(2)Intelligent display turbine flowmeter                                            

The double-row liquid crystal on-site displayc is used for the new intelligent meter integrating turbine flow sensor and display calculation using advanced ultra-low-power single-chip microcomputer technology adopts, which has the advantages of compact mechanism, intuitive and clear reading, high reliability, no external power interference, lightning strike resistance and low cost.The meter has three-point correction of the meter factor, intelligently compensates the nonlinear meter factor, and can be corrected on site. The high-definition liquid crystal display simultaneously displays instantaneous flow and cumulative flow, with clear function. All valid data is not lost after 10 years of power failure. This type of turbine flowmeter is explosion-proof.

The explosion-proof grade is: EXDIICT 6

This type of turbine flowmeter can be divided into LWGY-□B type and LWGY-□C type according to the power supply mode and whether it has remote signal output.

LWGY-□B type: 36V/10Ah lithium battery is uesd for the power supply (can run continuously for more than 3 years);

LWGY-□C type: 2AVDC external power supply is used for the power supply, and outputs 4-20mA standard two-wire current signal, and HART communication or RS485 communication function can be increased according to different site needs.


Product Classification Description

1、 According to different installation methods

Different installation methods for flow meters

2、 According to different types of signal detector

Different types of signal detector

Selection Instructions

                                                                                                                                    Table 1

Model

Description

LWGY-

Nominal diameter

4

4mm

6

6mm

10

10mm

15

15mm

20

20mm

25

25mm

32

32mm

40

40mm

50

50mm

65

65mm

80

80mm

100

100mm

125

125mm

150

150mm

200

200mm

Connection method

L

Thread(DN4mm - DN50mm)

F

Flange typeDN15mm- DN200mm )

Signal detector type

P

H

E

D

Normal aviation connector with 4 m cable (for N-type output type)

Hessmann connector (for N and A type output signal types)

Explosion-proof housing type (for N and A type output types)

Display type housing (for B, Cl, C2, C3 output types)

Output type

N

Sensor type: 24VDC power supply, output three-wire pulse signal

A

Transmitter type: 24VDC power supply, output 4 ~ 20mA current signal

B

Intelligent: lithium battery power supply, on-site display (dual power supply, pulse output can be optional)

Cl

Intelligent type: 24VDC power supply, on-site display, output 4 ~ 20mA (pulse output can be optional)

C2

Intelligent type: 24VDC power supply, on-site display, output two-wire 4 ~ 20mA HART communication, (pulse output can be optional)

C3

Intelligent type : 24VDC power supply, on-site display, RS485 communication, (dual power supply, pulse output can be optional)

Accuracy grade

05

0.5 grade

10

1.0 grade

02

0.2 grade (need to negotiate orders, production cycle is longer)

Turbine type

W

Extended measurement range

S

Standard measurement range

Material

S

304 stainless steel

L

316 (L) stainless steel (need to be customized, long production cycle)

Explosion proof

N

Non-explosion proof type

E

Explosion-proof tyoeEXDIICT 6

Pressure grade

P

Normal (refer to Table 3)


Installation Dimensions

1.Thread connection and  flange connection are used for the installation of the sensor according to different specifications. The installation method is shown in Fig.4, Fig.5 and Fig.6. The installation dimensions are shown in Table2.

Turbine flow sensor dimensions

Turbine flow sensor dimensions

                                                                                                                               Table 2

Nominal diameter(mm )

L(mm)

G

D(mm)

d(mm)

Number of holes n-d

4

225

G1/2

6

225

G1/2

10

345

G1/2

15

75

G1

Ф65

Ф14

4

20

80

G1

Ф75

Ф14

4

25

100

G5/4

Ф85

Ф14

4

32

140

G2

Ф100

Ф14

4

40

140

G2

Ф110

Ф18

4

50

150

Ф125

Ф18

4

65

170

Ф145

Ф18

4

80

200

Ф160

Ф18

8

100

220

Ф180

Ф18

8

125

250

Ф210

Ф25

8

150

300

Ф250

Ф25

8

200

360

Ф295

Ф23

12


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