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1、 Overview
The ARSLWQ-A current output gas turbine flowmeter is a new generation of high-precision and high reliability gas precision measuring instrument that has been independently developed and optimized by drawing on advanced technologies of flow meters at home and abroad, integrating theories of gas mechanics, fluid mechanics, electromagnetics, etc. It has excellent low-pressure and high-pressure measuring performance, multiple signal output modes, and low sensitivity to fluid disturbances. It is widely used for measuring gases such as natural gas, coal to gas, liquefied gas, and light hydrocarbon gas.
This type of turbine flow product itself does not have on-site display function, and only transmits the flow signal in the form of a current signal (4-20mA) for remote output. 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 flowmeter is an explosion-proof product with an explosion-proof rating of ExdIIBT6.
2、 Product Features
High quality alloy turbine with higher flow stability and corrosion resistance
Imported high-quality specialized bearings with long service life
The isolation between the measuring room and the ventilation room ensures the safety of the instruments
Wide flow range (Qmax/Qmin ≥ 20:1), good repeatability, high accuracy (up to 1.0 level), low pressure loss, low starting flow rate, up to 0.6m3/h
The instrument has explosion-proof and protective functions, with explosion-proof markings of Exd Ⅱ BT6 and Exia Ⅱ CT6, and a protection level of IP65
3、 Technical parameters:
1. Basic parameters: Table 1
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Instrument caliber and connection method
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25, 40, 50, 80, 100, 150, 200, 250 are connected by flanges
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25 and 40 can be connected using threaded connections
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accuracy class
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± 1.5% R, ± 1% R
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Range ratio
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1:10； 1:20； 1:30
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Instrument material
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Table body: 304 stainless steel; Impeller: anti-corrosion ABS or high-quality aluminum alloy; Converter: Cast aluminum
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Temperature of the tested medium (℃)
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-30℃～+80℃
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environmental condition
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Medium temperature: -30 ℃~+80 ℃, relative humidity 5%~90%, atmospheric pressure 86~106Kpa
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output signal
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Standard two-wire system 4-20mA
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power supply
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24VDC
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Signal transmission line
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2×0.3
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Distance
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≤1000m
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Signal line interface
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Internal thread M20 × 1.5
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Explosion proof grade
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ExdIIBT6
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protection grade
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IP65
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2. Measurement range and working pressure: Table 2 (Note: The measurement range shown in Table 2 is the flow range under working conditions)
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Model specifications
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Nominal diameter (mm)
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Flow range (m3/h)
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Initial flow rate (m3/h)
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Work pressure (MPa)
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Installation form
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ARSLWQ-25A
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25 （1'）
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0.7-7
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0.6
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4.0
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Flange (thread)
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ARSLWQ-25B
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1.5-15
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1.0
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4.0
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ARSLWQ-25C
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3-30
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2.0
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4.0
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ARSLWQ-40A
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40 （1.5'）
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4-40
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2.5
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4.0
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Flange (thread)
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ARSLWQ-40B
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8-80
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3
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4.0
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ARSLWQ-50A
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50 （2'）
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10-100
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3.5
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4.0
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flange
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ARSLWQ-50B
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15-150
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4
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4.0
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flange
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ARSLWQ-80
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80 （3'）
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15-300
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4
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1.6
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flange
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ARSLWQ-100
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100（4'）
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20-400
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5
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1.6
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flange
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ARSLWQ-150
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150（6'）
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50-1000
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8
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1.6
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flange
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ARSLWQ-200
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200（8'）
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100-2000
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20
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1.6
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flange
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ARSLWQ-200
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250（10'）
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150-3000
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30
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1.6
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flange
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ARSLWQ-300
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300（12'）
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200-4000
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40
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1.6
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flange
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4、 Instrument selection
1. Selection instructions
When selecting, users should reasonably choose the model and specifications of the flowmeter based on 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.
To achieve optimal performance of the flowmeter, the flow rate range should be within the Qmax range of (20% to 80%), which is more appropriate.
2. Selection Chart: Table 3
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Model
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Remarks
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ARSLWQ-
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□
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-□
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/□
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/□
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type
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A
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Current output gas turbine flow transmitter
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Instrument caliber
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25A/B/C
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25mm
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40A/B
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40 mm
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50A/B
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50 mm
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80
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80 mm
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100
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100 mm
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150
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150 mm
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200
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200 mm
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250
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250 mm
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300
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300 mm
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Sensor material
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N
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Basic material, high-quality aluminum alloy. (Maximum pressure resistance: 1.0MPa)
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S
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Stainless steel material. (High pressure anti-corrosion type)
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special structure
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A
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Oxygen specific structure (degreasing treatment)
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B
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Special structure for compressed air (high flow rate design)
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Example: Choose a stainless steel material, current output gas turbine flowmeter to measure oxygen, with a user measurement range of 10-35m3/h, model: ARSLWQ-A-40A/S
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