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Turbine flowmeter - natural gas flowmeter
The ZNLWQ natural gas flowmeter is a new generation of high-precision and highly reliable gas precision measuring instrument that has been independent
Product details
The ZNLWQ natural gas flowmeter is a new generation of high-precision and highly reliable gas precision measuring instrument that has been independently developed and optimized by drawing on advanced technology of flow instruments 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.
The ZNLWQ natural gas flowmeter adopts advanced ultra-low power single-chip microcomputer technology to develop a new intelligent instrument that integrates turbine flow sensor and display integration. It adopts dual row LCD on-site display, which has obvious advantages such as compact mechanism, intuitive and clear reading, high reliability, no external power interference, lightning resistance, and low cost. The instrument has six point correction for instrument coefficient, intelligent compensation for instrument coefficient nonlinearity, and can be corrected on site. The high-definition LCD display simultaneously displays instantaneous flow rate (4 significant digits) and cumulative flow rate (8 significant digits, with reset function). Keep all valid data intact for 10 years after power failure. Gas turbine flow meters are all explosion-proof products, with an explosion-proof rating of: ExdIIBT6。
Gas turbine flow meters can be divided into LWQ - □ B type and LWQ - □ C type according to power supply mode and whether they have remote signal output.
LWQ - □ B type: The power supply uses a 3.2V10AH lithium battery (which can operate continuously for more than 3 years); No signal output function.
LWQ - □ C type: The power supply adopts 24VDC external power supply, outputs 4-20mA standard two-wire current signal, and can add RS485 or HART communication according to different on-site needs.
Product features of ZNLWQ natural gas flowmeter:
ZNLWQ natural gas flowmeter is a high-quality alloy turbine with higher stability and corrosion resistance
ZNLWQ natural gas flowmeter imported high-quality special bearings with long service life
The ZNLWQ natural gas flowmeter metering room is isolated from the ventilation room to ensure the safety of the instrument
ZNLWQ natural gas flowmeter has a 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 ZNLWQ natural gas flowmeter 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
Intelligent Instrument Coefficient Multi point Nonlinear Correction of ZNLWQ Natural Gas Flow Meter
The ZNLWQ natural gas flowmeter system operates with low power consumption, and a 3.2V10AH lithium battery can be used continuously for more than 3 years
ZNLWQ natural gas flowmeter instrument coefficient and cumulative flow value will not be lost for ten years after power failure
Measurement range and working pressure of ZNLWQ natural gas flowmeter:
outside1
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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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Display mode
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Dual row LCD displays both instantaneous flow and cumulative flow simultaneously
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Instrument material
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Table body: 304 stainless steel; Impeller: anti-corrosion ABS or high-quality aluminum alloy; Monitor: 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 4-20mA (LWQ-C type)
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power supply
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LWQ-B type: The instrument is equipped with a built-in lithium battery, which can work continuously for more than 3 years. LWQ-C type: 24VDC external power supply
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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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Measurement range and working pressure of ZNLWQ natural gas flowmeter: 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 (m)3/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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ZNLWQ-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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ZNLWQ-25B
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1.5-15
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1.0
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4.0
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||
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ZNLWQ-25C
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3-30
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2.0
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4.0
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ZNLWQ-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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ZNLWQ-40B
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8-80
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3
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4.0
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||
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ZNLWQ-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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ZNLWQ-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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ZNLWQ-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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ZNLWQ-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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ZNLWQ-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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ZNLWQ-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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ZNLWQ-250
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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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ZNLWQ-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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ZNLWQ Natural Gas Flow Meter Selection Table: When selecting, users should reasonably choose the model and specifications of the flow meter 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 of the flowmeter should be within (20% to 80%) QmaxIt is more suitable within the scope.
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Model
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Remarks
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ZNLWQ-
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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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N
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Pulse output gas turbine flow sensor
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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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Turbine flowmeter - small caliber (small flow) liquid flowmeter
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