Roots gas meter without valve/ smart gas meter for remote meter reading (1600473090175)

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Product Overview

Description



Product Overview
Roots gas meter, also known as gas waist wheel gas meter, has a metering chamber in the shell. There are one or two pairs of waist wheels that can rotate tangentially in the metering chamber. A pair of driving gears are coaxially installed with the two waist wheels outside the flowmeter shell. They mesh with each other so that the two waist wheels can interact with each other, so as to obtain a gas meter for metering.
Roots gas meters are mainly used for high-precision metering instruments for continuous or
intermittent measurement of gas flow in pipelines. It has the characteristics of high precision, good
reliability, light weight, long life, low operating noise, easy installation and use, etc.


Working Principle
Roots gas meter is mainly composed of shell, conjugate rotor, counting device and other components. A pair of conjugate rotors installed in the metering chamber maintain the correct relative position of the rotor through the precision machined adjustment gear under the action of the inlet and outlet pressure difference of the circulating gas. The best working clearance is maintained between rotors, between rotor and shell, and between rotor and wall panel, so as to realize continuous non-contact sealing. Every time the rotor rotates for one cycle, the gas four times the effective volume of the metering chamber is output. The number of revolutions of the rotor is transmitted to the accumulation indication counter through the magnetic sealing coupling device and deceleration mechanism, so as to display the cumulative volume of the output gas


Product appearance




Roots gas meter


main technical parameters


Name of technical parameters
Unit

DN15
DN20
DN22
DN27
Minimum
flow
(Qmin)
m3/h
0.016
0.025
0.04
0.06
Maximum
flow
(Qmax)
m3/h
6
≤0.005
≤0.005
≤0.008
work
pressure
Kpa
≤50
4
6
10
Operating
temperature
°C

-20~60
4.8
7.2
12
communicat
ion method
RS485
1.2
2
3.5
485 Power
v
5.0
Backup
power
supply
V

3.6
maximum
reading
m3
99999.999
Minimum
reading
m3
0.001


Installation Requirements
1.Leak-proof protection should be done when the meter is installed, and a sealing ring or leak-proof air tape should be added to the nozzle;
2.The gas meter should be installed in a dry and well ventilated place where the room temperature is not lower than 5 ℃ and is convenient for meter checking and maintenance.
3.It is strictly forbidden to install gas meters in bedrooms, bathrooms, boiler rooms, and storage places for flammable and dangerous goods.
4.Users of public buildings should try to set them up in separate rooms.



Main fratures
1)Office meter reading:It uses smart control module, meter reading personnel do not need to go to the door to read the meter,just log on to the gas management website on the computer, choose the community or users who need to read the meter, you can achieve group copy copy, achieve the office read the meter, reduce the work intensity of meter reading personnel, improve work efficiency.
2)Fee payment:Users do not need to go to the business hall of the gas company to pay fees. Users can choose the online recharge platform, APP or third-party platform of the gas company to pay fees.(Need to consult gas company, whether to support the above recharge way)
3)Low power consumption and easy to replace, the battery can last more than 12 months.
4)voltage detection:When the battery undervoltage is detected, the indicator light of the meter will turn red, and the user shall replace the new battery as soon as possible (no. 5 alkaline dry battery, 4). When the battery is exhausted, the indicator light will go off, and the meter valve will automatically close, and the user shall replace the new battery (no. 5 alkaline dry battery,
4).If the lithium battery is used, please contact the gas company when the battery needs to be replaced, and the professional personnel shall replace the battery.
5)Good protective:The controller shell adopts special dustproof and waterproof design with protection grade IP65.


Product operating environment
1.temperature:-10℃~40℃;
2.working pressure:0.5kPa~30kPa;
3.relative humidity:≤93%;
4.atmospheric pressure:86kPa~106kPa;
5.This series of gas meters is applicable to the measurement of urban pipeline gas, natural gas and liquefied petroleum gas;
6.The gas used should comply with the relevant provisions of the state, can not contain water to prevent condensation water will be frozen meter;
7.It should be installed in a dry and ventilated place, strictly prohibited in the bedroom or bathroom;
8.It should not be installed in the place of serious corrosion to the table;
9.Adequate safe distance from furnace and other sources of fire;
10.In order to avoid condensed water into the table, the table should be installed horizontally at the high point of the pipeline.




After the communication module is superimposed, if combined with the integrated energy
control platform software independently developed by the company,It can realize:
* Unmanned, reduced manpower.
●automatic data logging.
●Industrial-grade communication equipment ensures the safety and reliability of meter reading.
●Complete system log traceability is available.
●Visual graphics, data statistics.
●Meter status alarm;When low-power and low-volume magnetic attack sampling fault leakage alarm (external leakage alarm) occurs,
real-time alarm information is uploaded to the background application platform.
●Control the gasmeter valve switch through background application software (desktop WEB and mobile APP).
●When the meteris removed or attacked by external forces, the information will be transmitted to the background application
platform in real time
●The stability of data transmission can be monitored.


Product operating environment
1.temperature:-10℃~40℃;
2.working pressure:0.5kPa~30kPa;
3.relative humidity:≤93%;
4.atmospheric pressure:86kPa~106kPa;
5.This series of gas meters is applicable to the measurement of urban pipeline gas, natural gas and liquefied petroleum gas;
6.The gas used should comply with the relevant provisions of the state, can not contain water to prevent condensation water will
be frozen meter;
7.It should be installed in a dry and ventilated place, strictly prohibited in the bedroom or bathroom;
8.It should not be installed in the place of serious corrosion to the table;
9.Adequate safe distance from furnace and other sources of fire;
10.In order to avoid condensed water into the table, the table should be installed horizontally at the high point of the pipeline.




Installation and safety matters
1.Before installation, the gas meter should be inspected first for appearance and then for sealing performance, so as to prevent installation and use of the gas meter that may cause damage during transportation.
2.When installing the gas meter, it should be noted that the distance between the center of the pipeline connected with the gas meter should be consistent with the distance between the center of the gas meter. It should not be forced to connect and twist to avoid leakage at the connection of the gas meter.
3.The gas meter should have sufficient safe distance from the stove and other fire sources.
4.Keep in mind:The air in the pipeline and gas meter should be emptied before ignition.Gas mixed with air can easily explode when it meets spark.
5.During transportation, storage and installation of gas meters, care should be taken to prevent falling upside down and water entering.
6.The fuel gas used should meet the requirements of the national standards and should not contain moisture. The condensed water in fuel gas will freeze the table and cannot operate normally
7.In order to avoid condensate water into the gas meter, the gas meter should be installed horizontally at the high point of the pipeline when installation should pay attention to the top of the case arrow, indicating the direction of gas flow, should not be connected to the reverse (because the table has anti-retrograde device).
8.The gas meter should be installed in a dry and ventilated place. It is strictly prohibited to install the gas meter in the
bedroom and bathroom, and should not be installed in the place where the gas meter is seriously corroded.
9.When the pipeline system leaks, it is forbidden to leak the open fire. When the pilot fire is carried out, the air in the gas
meter must be discharged to prevent accidents
10.In case of malfunction, please do not disassemble by yourself, please ask the technical personnel of gas company for
maintenance.
11.In case of gas leakage, first close the front table valve, immediately open doors and Windows ventilation.
12.Do not use open fire leak detection, carefully with soap and water leak detection.
13.This meter can not be used in the use of strong caustic soda gasoline alcohol solvent cleaning.


Factory environment




Qualification:




Packing and delivery:




0.0568 s.