Product overview
LWGQ series gas turbine flowmeter is a new generation of high precision and high reliability gas precision measuring instrument, which integrates temperature, pressure, flow sensors and intelligent flow totalizer. It has excellent low-pressure and high-pressure metering performance, It is widely used in the measurement of natural gas, coal to gas, liquefied gas, light hydrocarbon gas, etc< br />
According to gb3836.2000 "electrical equipment for explosive gas atmospheres Part 1: General requirements", gb38362.2-2000 "electrical equipment for explosive gas atmospheres Part 2: flameproof type & lt; d”》 And gb3836.4-2000 electrical apparatus for explosive gas atmospheres Part 4: intrinsic safety; i”》 The explosion-proof mark is Exd Ⅱ BT6 (flameproof type) and EIA Ⅱ CT6 (intrinsically safe type). It is suitable for 0 (intrinsic safety type only) zone 1 and 2 dangerous places with explosive gas mixture of class IIa, IIb and IIC T1-T6 temperature groups.
 
Product features
The new sensor has the advantages of low starting flow, small pressure loss, good anti vibration and anti pulsating flow performance, no corrosion, good reliability and long service life;
New type microprocessor and high performance integrated chip are adopted, with high precision, powerful function and superior performance;
Using advanced micro power technology, low power consumption. It can be operated by both internal battery and external power supply for a long time;
According to the flow frequency signal, the meter coefficient can be automatically linear corrected in eight sections, and the calculation accuracy of the meter can be improved according to the user's needs;
Using EEPROM data storage technology, it has the function of historical data storage and query, and three kinds of historical data recording methods are available for users to choose;
The meter head can be 180 DEG; Rotation, easy to install and use;
High accuracy, generally up to & plusmn; 1.5%R、± 1.0%R;
Good repeatability, short-term repeatability up to 0.05% - 0.2%, it is precisely because of good repeatability, in trade settlement is the preferred flowmeter;
It can detect the temperature, pressure and flow of the detected gas, automatically track and compensate the flow, and display the gas flow under the standard state (PN = 101.325kpa, TN = 293.15K): it can query the data of temperature, pressure, time and date in real time.

technical parameter
Executive Standard & nbsp;
  Measurement of gas flow in closed pipe & mdash; Gas turbine flowmeter (GB / t8940-2003)
Instrument diameter (mm) and connection mode & nbsp;
  20. 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300 are connected by flange & nbsp< br />
  25, 40 and 50 can be connected by thread
Accuracy level & nbsp;
 & plusmn; 1.5%R（± 1% R (special)*
Range ratio & nbsp;
  1:10 ； 1:20 ； 1:30
Instrument material & nbsp;
  Body: 304 stainless steel or cast aluminum & nbsp< br />
  Impeller: anti corrosion ABS or high quality aluminum alloy & nbsp< br />
  Converter: cast aluminum
Conditions of use & nbsp;
  Medium temperature: - 20 ℃ ~ + 80 ℃ & nbsp< br />
  Ambient temperature: - 30 ℃ ~ + 60 ℃ & nbsp< br />
  Relative humidity: 5% - 90% < br / >
  Atmospheric pressure: 86kpa ～ 106kpa
Working power supply & nbsp;
  A. External power supply + 24 VDC & plusmn; 15%, Ripple & le& plusmn; 5%, suitable for 4-20mA output, pulse output, RS485, etc. & nbsp< br />
  B. Internal power supply: a set of 3.0v10ah lithium battery, which can work normally when the battery voltage is 2.0V ~ 3.0V& nbsp;< br />
  Under voltage indication appears when the voltage is lower than 2.0
Energy consumption of the whole machine & nbsp;
  External power: & lt; 1W

  Internal power supply: average power consumption & le; 1WIt can be used continuously for more than three years.
Signal output function & nbsp;
  Pulse signal, 4-20mA current signal, control signal
Communication output function & nbsp;
  RS485 communication
Real time recording function;
  Start stop record, diary record, fixed time interval record
Signal connection port & nbsp;
  Internal thread M20 & times; 1.5 or others
Explosion proof grade & nbsp;
  Exd Ⅱ BT6 or Exia Ⅱ cT4
Protection level & nbsp;
  IP65
 
Measuring range and working pressure
Nominal diameter & nbsp< br />
（mm）
model
Standard range & nbsp< br />
（m³/ h)
Extended range & nbsp< br />
（m³/ h）
Conventional withstand voltage level & nbsp< br />
（Mpa）
Special high voltage class & nbsp< br />
（Mpa）
Installation method
DN20
LWGQ－20
A
2.2-25
B
4-40
one point six
2.5,4.0
flange
DN25
LWGQ－25
A
2.2-25
B
4-40
one point six
2.5,4.0
Flange (thread)
DN32
LWGQ－32
A
5-50
B
6-60
one point six
2.5,4.0
flange
DN40
LWGQ－40
A
5-50
B
6-60
one point six
2.5,4.0
Flange (thread)
DN50
LWGQ－50
A1
6-65
B1
5-70
one point six
2.5,4.0
flange
LWGQ－50
A2
10-100
B2
8-100
DN65
LWGQ－65
A
15-200
B
10-200
one point six
2.5,4.0
flange
DN80
LWGQ－80
A1
13-250
B
10-160
one point six
two point five,4.0
flange
LWGQ－80
A2
20-400
flange
DN100
LWGQ－100
A1
20-400
B
13-250
one point six
two point five
flange
LWGQ－100
A2
32-650
flange
DN125
LWGQ－125
one
25-700
B
20-800
one point six
two point five
flange
DN150
LWGQ－150
A1
32-650
B
80-1600
one point six
two point five
flange
LWGQ－150
A2
50-1000
flange
DN200
LWGQ－200
A1
80-1600
B
50-1000
one point six
______
flange
LWGQ－200
A2
130-2500
flange
DN250
LWGQ－250
A1
130-2500
B
80-1600
one point six
______
flange
LWGQ－250
A2
200-4000
flange
DN300
LWGQ－300
one
200-4000
B1
130-2500
one point six
______
flange
B2
320-6500
one point six
 
Product classification
Product picture
　
　　　
Instrument model
LWGQ-E
LWGQ-D
signal output
4-20mA
Optional 4-20mA / pulse
Power supply
24VDC± 15%
24VDC± 15% + lithium battery
Accuracy class
Grade 1.5-1.0
Grade 1.5-1.0
measuring range
Standard range or extended range
Standard range or extended range
monitor
yes
yes
Temperature and pressure compensation
nothing
yes
communication interface
nothing
RS485
Real time recording
nothing
yes
Instrument material
Aluminum alloy or stainless steel
Aluminum alloy or stainless steel
Explosion proof grade
Exdiibt6 or ExiaIICT4
Exdiibt6 or ExiaIICT4
Protection level
IP65
IP65
Overall power consumption
< 1W
< 1W
Instrument thoroughfare
DN25～DN300
DN25～DN300
Installation method
Flange installation
Flange installation
Medium temperature
-20℃～80℃
-20℃～80℃
ambient temperature
-30℃～60℃
-30℃～60℃
 
Product picture
　　　　
　　　　
　　　　
Instrument model
LWGQ-N
LWGQ-A
LWGQ-B
LWGQ-C
LWGQ-D
signal output
pulse
4-20mA
nothing
4-20mA
Optional 4-20mA / pulse
Power supply
+24VDC± 15%
+24VDC± 15%
lithium battery
24VDC± 15%
24VDC± 15% + lithium battery
Accuracy class
Grade 2.5-1.5
Grade 1.5-1.0
Grade 1.5-1.0
measuring range
Standard range
Standard range or extended range
Standard range or extended range
monitor
nothing
yes
yes
Temperature and pressure compensation
nothing
nothing
yes
communication interface
nothing
nothing
RS485
Real time recording
nothing
nothing
yes
Instrument material
Aluminum alloy or stainless steel
Aluminum alloy or stainless steel
Aluminum alloy or stainless steel
Explosion proof grade
Exdiibt6 or ExiaIICT4
Exdiibt6 or ExiaIICT4
Exdiibt6 or ExiaIICT4
Protection level
IP65
IP65
IP65
Overall power consumption
< 1W
< 1W
< 1W
Instrument thoroughfare
DN25～DN300
DN25～DN300
DN25～DN300
Installation method
Flange installation
Flange installation
Flange installationMedium temperature
-20℃～80℃
-20℃～80℃
-20℃～80℃
ambient temperature
-30℃～60℃
-30℃～60℃
-30℃～60℃
 
On site cases




Field application of explosion proof turbine flowmeter
Application principle in gas measurement
Precautions for installation in pipelines
Field application in energy measurement