DN300 LCD Display Stainless Steel LPG Thermal Gas Mass Flow Meter

Product Description

Product Description

 

 Insertion Type Thermal Gas Mass Flow Meter

A.[Features of thermal mass flowmeter]

Convenient and accurately measuring

The thermal mass flowmeter can measure the gas flow rate without temperature and pressure consumption;

Large ratio of measuring range

The Hot Sale And Loner Warranty Period Nitrogen Gas Flow meter could measure gas with velocity of flow from 100Nm/s to 0.5Nm/s 

Good performance and longer working life

The digital thermal mass flow meter with good anti-seismic performance and longer working life,the transmitter don't cantain movable part and pressure sensor,

High Qulaity Material

The Hot Sale And Loner Warranty Period Nitrogen Gas Flow meter with high quality stainless steel 304 material or ss316 optional

B.[Parameters]

Production Name	Thermal mass flowmeter
Medium	all kinds of gas
Diameter	DN20~DN2000
Flow rate	0.5~100Nm/s
Accuracy	1.0%;1.5%
Temperature	Sensor:Ambient temperature:-10~200ºC
	Max temperature:10~350ºC
	converter: 10~45ºC
Pressure	Medium pressure≤4.0Mpa
Power supply	Integrated:DC24V or AC220V≤180W
	Splited:AC220V≤19W
Feedback speed	1s
Output	Standard output:4~20mA;Can customized for RS485
Material	Stainless steel 304 material
Display	LCD Display
Display	mass flow;volume flow;total flow;time;temperature;standard flow.
Protection class	IP67
Converter material	stainless steel material

 1.Flow range

Item	The thermal mass flow meter flow range table
Diameter	Flow range (Nm^3/h)
DN20	1.2~120
DN25	2.5~168.5
DN32	4~275
DN40	6~430
DN50	9~671.5
DN80	20~1718.5
DN100	30~2685
DN150	60~6045
DN150	60~6045(plug-in)
DN200	120~12738.5(plug-in)
DN250	150~18779(plug-in)
DN300	200~28000(plug-in)
DN400	350~48955.5(plug-in)
DN500	600~77177.5(plug-in)
DN600	800~100000(plug-in)

 

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FAQ

The common problems and solutions of thermal gas mass flow meters are as follows, classified by fault type:

1, Display Exception
No display or black screen
Reason: Power failure (power outage, unstable voltage), internal circuit damage, loose or damaged display screen pins, DC24V power supply polarity reversed.
Solution: Check the power connection and voltage stability; Confirm that the positive and negative poles of DC24V are correct; Re insert the display screen pins or replace the display screen; Contact the manufacturer to repair the circuit.

Instantaneous flow anomaly (large fluctuation/zero display)
Reason: reversed probe direction, dirty or damaged sensor, incorrect parameter settings (range/filtering coefficient), flow field disturbance (insufficient straight pipe section, valve interference).
Solution: Correct the direction of the probe; Clean or replace sensors; Check the flow rate parameters and filtering coefficients; Ensure that the upstream straight pipe section is ≥ 5D (pipe diameter) and away from valves/elbows.

2, Measurement accuracy issue
Large reading deviation
Reason: Changes in gas composition, fluctuations in environmental temperature and pressure, sensor contamination, improper installation location (not in the center of the pipeline/liquid accumulation).
Solution: recalibrate the instrument; Clean the sensor; Adjust the installation position to the center of the pipeline; Vertical pipelines prevent misjudgment of airflow direction.

Abnormal 4-20mA output
Reason: Range setting error, wiring loop issue, converter failure 9.
Solution: Verify the range configuration; Check the wiring and eliminate interference; Contact the supplier to repair the converter.

3, Response performance issues
Slow response speed
Reason: Sensor aging, internal processing delay.
Solution: Replace the sensor; Upgrade the instrument firmware or hardware.

Unstable flow control (fluctuation)
Reason: Low or unstable air source pressure, loose circuit connectors, and faulty regulating valves.
Solution: Stabilize the gas source pressure; Tighten circuit connectors; Repair or replace the regulating valve.

4, Installation and maintenance issues
Installation errors leading to malfunctions
Error type: Reverse flow direction (probe arrow does not match airflow), insufficient straight pipe section (<5D), misjudgment of airflow direction in vertical pipeline.
Consequence: Negative flow display, error exceeding ± 15%.
Correction: Install strictly according to the flow direction markings; Ensure the upstream straight pipe section; Confirm the airflow from bottom to top in the vertical pipeline.

Sensor blockage or contamination
Prevention: Clean the pre filter monthly; Blow dry nitrogen in both directions for at least 30 minutes during shutdown.

5, Environmental and operational requirements
Temperature and humidity influence
Requirement: Environmental temperature -20 ºC~55 ºC; Avoid high humidity environments (which may cause the probe to become damp).

Operation taboos
It is prohibited to install/remove non plug and unplug probes under pressure;
Avoid sudden valve opening causing flow shock;
Disable compressed air blowing instrument.