Liquid Turbine Flow Meter

L W G Y Liquid Turbine Flow Meter

1.0 Product photos

(图片内容：产品照片)

2.0 General Information

This manual will assist you in installing, using and maintaining your turbine flow meter. It is your responsibility to make sure that all operators have access to adequate instructions about safe operation and maintenance procedure…

Warning

For your safety, review the major warnings and cautions below before operating your equipment.

Use only fluids that are compatible with the housing material and wetted components of your meter.
When measuring flammable liquids, observe precautions against fire or explosion.
When handling hazardous liquids, always follow the fluid manufacturer’s safety precautions.
When working in hazardous environments, always exercise appropriate safety precautions.
During meter removal, fluids may spill. Follow the fluids manufacturer’s safety precautions for clean up of minor spills.
Don’t blow compressed air through the turbine.
Handle the rotor carefully. Even small scratches or nicks can affect accuracy.
When tightening the turbine flow meter, use a wrench only on the wrench flats.
For best results, calibrate the meter at least 1 time per year.

Product Description
L W G Y series turbine flow meter have the features: high accuracy, good repeatability, convenient installation/maintenance, Simple structure etc.

Liquid flows through the turbine housing causing an internal rotor to spin. As the rotor spins, an electrical signal is generated in the pickup coil. This signal is converted into engineering units (liters, cubic meters, gallons etc.) on the local display where is applicable. Optional accessory modules can be used to export the signal to other equipment.

Upon receipt, examine your meter for visible damage. The turbine is a precision measuring instrument and should be handled carefully. Remove the protective plugs and caps for a thorough inspection. If any items are damaged or missing, contact Wanxiang Instrument.

Make sure the turbine flow model meets your specific needs. For your future reference, it might be useful to record this information on nameplate in the manual in case it becomes unreadable on the turbine.

3.0 Specifications

Performance
Repeatability: ±0.2%
Accuracy: Standard: ±1% of reading;
Optional: ±0.5% of reading or ±0.2% of reading

Wetted Components
Housing: Standard – 304 Stainless Steel
Optional – 316 Stainless Steel
Bearings and Shaft: Tungsten Carbide
Rotor: 2Cr13 Stainless Steel (Optional Alloy CD4Mcu)
Retaining Rings: 304 Stainless Steel

Output Signal: (Where applicable)
Sensor: Pulse signal (Low Level: ≤0.8V; High Level: ≥8V)
Transmitter: 4 to 20 mA DC current signal

Signal Transmission Distance: ≤1,000 m

Electrical Connections:
Basic Type: Hausman Connector or three-core cable
Explosion Proof Type: ISO M20×1.5 Female

Explosion Proof Level:
Standard: None
Optional: ExdIIBT6

Protection Level: IP65

3.0 OPERATION CONDITIONS

Ambient:
Temperature: -10℃ to +55℃
Pressure: 86 to 106 KPa
Relative Humidity: 5% to 90%

Power Supply:
Sensor: +12V DC (Optional: +24V DC)
Transmitter: +24V DC
Field Display Type B: Integral 3.2V Lithium Battery (Others available on request)
Field Display Type C: +24V DC

Fluid Temperature and Pressure:
Temperature: -20℃ to +110℃
Pressure: Fluid pressure should be limited according to flange rating.

Measurable Flow Rate Range and Pressure Level: (See table 1)

Table 1. Measurable Flow Rate Range and Pressure Rating

Nominal Diameter		Standard Flow Range (SFR)	Extended Flow Range (EFR)	Standard Pressure Rating	Customized Pressure Rating (MPa) + Flange Fitting
(mm)	(in.)	(m³/h)	(m³/h)	(MPa)
4	0.15	0.04 to 0.25	0.04 to 0.4	Thread: 6.3	12, 16, 25
6	0.25	0.1 to 0.6	0.06 to 0.6	Thread: 6.3	12, 16, 25
10	0.4	0.2 to 1.2	0.15 to 1.5	Thread: 6.3	12, 16, 25
15	0.5	0.6 to 6	0.4 to 8	Thread: 6.3; Flange: 2.5	4.0, 6.3, 12, 16, 25
20	0.75	0.8 to 8	0.45 to 9	Thread: 6.3; Flange: 2.5	4.0, 6.3, 12, 16, 25
25	1	1 to 10	0.5 to 10	Thread: 6.3; Flange: 2.5	4.0, 6.3, 12, 16, 25
32	1.25	1.5 to 15	0.8 to 15	Thread: 6.3; Flange: 2.5	4.0, 6.3, 12, 16, 25
40	1.5	2 to 20	1 to 20	Thread: 6.3; Flange: 2.5	4.0, 6.3, 12, 16, 25
50	2	4 to 40	2 to 40	Flange: 2.5	4.0, 6.3, 12, 16, 25
65	2.5	7 to 70	4 to 70	Flange: 2.5	4.0, 6.3, 12, 16, 25
80	3	10 to 100	5 to 100	Flange: 2.5	4.0, 6.3, 12, 16, 25
100	4	20 to 200	10 to 200	Flange: 1.6	4.0, 6.3, 12, 16, 25
125	5	25 to 250	13 to 250	Flange: 1.6	2.5, 4.0, 6.3, 12, 16
150	6	30 to 300	15 to 300	Flange: 1.6	2.5, 4.0, 6.3, 12, 16
200	8	80 to 800	40 to 800	Flange: 1.6	2.5, 4.0, 6.3, 12, 16

4.0 Model and Selection

4.1 Turbine Flow Sensor/Transmitter
L W G Y-□N Type Sensor: 12 to 24V DC Power Supply; Pulse Output
L W G Y-□A Type Transmitter: 24V DC Power Supply; 2-wire 4 to 20 mA Output

Basic Type (Without Explosion Proof) and Explosion Proof Type are optional for L W G Y-□N and L W G Y-□A.
(图片内容：Basic Type 和 Explosion Proof Type 产品图)

4.2 Intelligent Integrated Turbine Flow Meter (Refer to photo on page 1)

4 digital instantaneous flow display
8 digital totalizator flow display (Resettable)
With Explosion Proof (Level: ExdIIBT6)
3-Point Correction and Non-linearity Compensation on K-Factor

Note: The K-Factor represents the number of output pulses transmitted per cubic meter (Optional: Liter and Gallons) of fluid passing through the turbine meter. Each turbine has a unique K-Factor. However, turbine meters are not functionally consistent throughout the full flow range of the meter. Therefore, correction and non-linearity compensation on K-Factor can enhance accuracy.

L W G Y-□B Type: powered with 3.2V 10AH lithium battery (Battery life > 4 years); no output
L W G Y-□C Type: 24V DC Power Supply; 2-wire 4 to 20 mA Output(Optional: RS485 or HART).

4.3 Selection (See Table 2)

Table 2. Model Selection Guidance

Model Suffix Code						Description
L W G Y –	□	□	□	□	□	(SFR: Standard Flow Range)
Nominal Diameter (mm)	4					4mm, SFR: 0.04 to 0.25 m³/h
	6					6mm, SFR: 0.1 to 0.6 m³/h
	10					10mm, SFR: 0.2 to 1.2 m³/h
	15					15mm, SFR: 0.6 to 6 m³/h
	20					20mm, SFR: 0.8 to 8 m³/h
	25					25mm, SFR: 1 to 10 m³/h
	32					32mm, SFR: 1.5 to 15 m³/h
	40					40mm, SFR: 2 to 20 m³/h
	50					50mm, SFR: 4 to 40 m³/h
	65					65mm, SFR: 7 to 70 m³/h
	80					80mm, SFR: 10 to 100 m³/h
	100					100mm, SFR: 20 to 200 m³/h
	125					125mm, SFR: 25 to 250 m³/h
	150					150mm, SFR: 30 to 300 m³/h
	200					200mm, SFR: 80 to 800 m³/h
Type	N					Basic Type: +12V or +24V DC Power Supply; Pulse Output
	A					4 to 20 mA current output
	B					Battery Power Supply with field Display
	C					Field Display and 4~20 mA current Output
	C1					Field Display and RS485
	C2					Field Display and HART
Accuracy Rating	10					±1.0% of reading
	05					±0.5% of reading
Measurable Range	S					Standard: Refer to table 1
	E					Extended: Refer to table 1
Housing Material	S					304 Stainless Steel
	L					316 L Stainless Steel
Explosion Rating	–					Blank: without Explosion Proof
	E					Explosion Proof: ExdIIBT6
Pressure Rating	N					Standard: Refer to table 1
	H(x)					Customized: Refer to table 1

5.0 Cautions for Installation

Mounting Positions
Turbine flow meters should be installed at the place in compliance with the requirements below

Easy maintenance
No vibration
No electromagnetic interface
Away from heat source

Mounting Orientation
All SURE turbine flow meters are designed to measure flow in only one direction. The direction is indicated by the arrow on the body.

Required Lengths of Straight Runs
Flow altering device such as elbows, valves and reducers can affect accuracy. See diagram 1 for typical flow meter system installation.

Diagram 1. Typical Flow Meter System Installation
(图片内容：安装示意图，标注有 BLOCK VALVE, FILTER/STRAINER, FLOWMETER, BYPASS, 10 PIPE DIAMETERS UPSTREAM, 5 PIPE DIAMETERS DOWNSTREAM)

The recommended guidelines are given to enhance accuracy and maximize performance. Distance given here are minimum requirements; double them for desired straight pipe lengths.

Upstream: allow a minimum straight pipe length at least 10 times the internal diameter of the pipe. For example, with the 50mm pipe, there should be 500mm of straight pipe immediately upstream. Desired upstream straight pipe length is 1000mm.
Downstream: allow a minimum straight pipe length at least 5 times the internal diameter of the pipe. For example, with the 50mm pipe, there should be 250mm of straight pipe immediately upstream. Desired upstream straight pipe length is 500mm.

See diagram 2 for straight pipe length requirement when there is altering device.
Diagram 2. Number of Pipe Diameter (D=Diameter)
(图片内容：包含 Reduced Pipe, Two Elbows in plane, Expanded Pipe, Two Elbows out of plane 的示意图)

Anti-Cavitation
Cavitation can be caused by entrained air, and it can seriously damage the rotor on a turbine flow meter. An amount higher than about 100 mg/l of entrained air or gas can produce error. In addition, cavitation can be caused by too little backpressure on the flow meter. For SURE turbine flow meters, you should provide a backpressure (downstream pressure) of at least 1.25 times the vapor pressure, plus 2 times the pressure drop through the flow meter. See Formula 1.

Formula 1: Pb ≥ 1.25×Pv + 2× (Pin − Pout)
In formula 1: (Pb: Back pressure; Pv: Vapor Pressure; Pin: InletPressure; Pout: Outlet Pressure)

Create backpressure by installing a control valve on the downstream side of the meter at the proper distance detailed above.

Special Notice

Foreign material in the liquid being measured can clog the meter’s rotor and adversely affect accuracy. If this problem is anticipated or experienced, install screens to filter impurities from incoming liquids.
To ensure accurate measurement, drain all air from the system before use.
When the meter contains removable coverplates. Leave the coverplate installed unless accessory modules specify removal. Don’t remove the coverplates when the meter is powered, or electrical shock and explosion hazard can be caused.

Thread Connections

To protect against leakage, seal all threads with an appropriate sealing compound. Make sure the sealing compound does not intrude into the flow path.
Make sure the arrow on the outlet is pointed in the direction of the flow.
Tighten the turbine onto the fittings. Use a wrench only on wrench flats.

Flange Connections
The flange follows GB/T 9119-2000 (ISO 7005-1) RF (Raised Face).
Note: Flange can be customized following other criterias.
Use a gasket between the meter and mating flange. Determine the material of the gasket based on the operating conditions and type of fluid.
Note: Do not over tighten the flange bolts. This may cause the gasket to be compressed into the flow stream and may decrease the accuracy of the meter.

Installation Dimensions
Thread or flange connection is used according to different flow models. See Figure 1, 2, 3 and Table 3 for detailed dimensions.

Note: The description may be different with the product, please contact us for quotation.
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