Features
●With the new sensor, the starting flow rate is low, the pressure loss is small, the anti-vibration and anti-pulsation flow performance is good, not easy to corrosion, good reliability, long service life.
●The new microprocessor and high performance integrated chip are adopted to achieve high computing accuracy, powerful functions and superior performance.
●Adopt advanced micro power consumption high technology, low power consumption of the whole machine.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 divided into eight sections for automatic linear correction, according to the user needs to improve the calculation accuracy of the meter.
●Using EEPROM data storage technology, it has the function of storing and querying historical data, and three kinds of historical data recording methods are available for users to choose.
●Headers can be 180 ° rotation of the flow meter, installation is simple to use convenient.
●High accuracy, generally up to±1.5%R、±1.0%R.
●Good repeatability, short-term repeatability up to 0.05% ~ 0.2%, is precisely because of the good repeatability, in the trade settlement is the preferred flow meter.
●It can detect the temperature, pressure and flow rate of the detected gas, automatically track and compensate the flow rate, and display the gas flow rate under the standard state (Pn=101.325KPa,Tn= 293.15k) : it can query the temperature, pressure, time, date and other data in real time.
Instrument classification Table 1
Selection of instructions
1.Selection of instructions
When selecting the type, users should reasonably select the type and specification of the flowmeter according to the nominal pressure of the pipeline, the maximum pressure of the medium, the temperature of the medium, the composition of the medium, the flow range and the signal output requirements.
In order to optimize the performance of the flow meter, the flow range of the flow meter should be within the range of (20%~80%) Qmax.
Signal output mode of flowmeter at factory: pulse signal output (three-wire system), standard flow signal (IC card) or rs-485 communication output.If other output functions are required, please specify when ordering.
2.Selection system
Table 2
|
Model
|
Instructions
|
|
LWGQ－
|
□
|
-□
|
/□
|
/□
|
/□
|
/□
|
|
Instrument type
|
N
|
|
|
|
|
|
Sensor type: +12V or 24V power supply, output three-wire pulse signal
|
|
A
|
Transmitter type: +24V power supply, output two-wire system 4~20mA
|
|
B
|
Intelligent: lithium battery power, no signal output field display
|
|
C
|
Intelligent: +24V power supply, field display and output two-wire system 4~20mA
|
|
D1
|
Full intelligent: integrated temperature and pressure compensation, field display and remote signal transmission (square converter)
|
|
D2
|
Full intelligent: integrated temperature and pressure compensation, field display and remote signal transmission (circular converter)
|
|
Nominal diameter
|
25
|
DN25mm
|
|
32
|
DN32mm
|
|
40
|
DN40mm
|
|
50
|
DN50mm
|
|
65
|
DN65mm
|
|
80
|
DN80mm
|
|
100
|
DN100mm
|
|
125
|
DN120mm
|
|
150
|
DN150mm
|
|
200
|
DN200mm
|
|
250
|
DN250mm
|
|
300
|
|
DN300mm
|
|
Scale range
|
W(x)
|
To extend the range, please refer to Table 2 of the P3 page to select
|
|
S(x)
|
|
Standard range, please refer to table 2 on page P3 to select
|
|
Surface material
|
S
|
Stainless steel
|
|
L
|
|
Aluminum alloy
|
|
Machine core material
|
S
|
Anticorrosive ABS
|
|
L
|
|
Aluminum alloy
|
|
|
N
|
No special structure
|
|
B
|
Special purpose for compressed air
|
Example: choose a stainless steel material, temperature and pressure compensation integrated gas turbine Flowmeter to measure the air, the user working condition measurement range 6-60m3 / h, model: LWGQ-D-40W/S/N
Installation dimensions
The flowmeter is shown in the figure, and the specific size is shown in table 4
Note: figure 4 shows the configuration of temperature and pressure compensation instrument.
The size of the instrument sensor is the same as that of all types of calibre.
Table 3
|
Size
|
Meter length L
|
Outside diameter D
|
Bolt spacing K
|
Number of bolt holes n
|
Bolt aperture d
|
Bolt specification
|
Thread type meter length mm
|
|
mm
|
mm
|
mm
|
mm
|
|
mm
|
mm
|
Compensation type
|
Conventional type
|
G external thread
|
|
DN25
|
170
|
115
|
85
|
4
|
Φ14
|
M12×50
|
170
|
170
|
G2
|
|
DN32
|
200
|
140
|
100
|
4
|
Φ18
|
M16×70
|
200
|
140
|
G2
|
|
DN40
|
200
|
150
|
110
|
4
|
Φ18
|
M16×70
|
200
|
140
|
G2
|
|
DN50
|
200
|
165
|
125
|
4
|
Φ18
|
M16×70
|
|
220
|
G5/2
|
|
DN65
|
240
|
185
|
145
|
4
|
Φ18
|
M16×70
|
|
|
|
|
DN80
|
240
|
200
|
160
|
8
|
Φ18
|
M16×70
|
|
|
|
|
DN100
|
300
|
220
|
180
|
8
|
Φ18
|
M16×80
|
|
|
|
|
DN125
|
240
|
250
|
210
|
8
|
Φ18
|
M16×80
|
|
|
|
|
DN150
|
450
|
285
|
240
|
8
|
Φ22
|
M20×90
|
|
|
|
|
DN200
|
500
|
340
|
295
|
12
|
Φ22
|
M20×90
|
|
|
|
|
DN250
|
500
|
405
|
355
|
12
|
Φ26
|
M24×110
|
|
|
|
|
DN300
|
300
|
460
|
410
|
12
|
Φ26
|
M24×110
|
|
|
|
|
DN350
|
350
|
520
|
470
|
16
|
Φ26
|
|
|
|
|
|
DN400
|
400
|
580
|
520
|
16
|
Φ30
|
|
|
|
|
