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China, Chinese Roots Type Gas Meter (LNG) Without Valve/Gas Detector1 Industrial Products Supplier Manufacturer Details, price list catalog:
China Industrial Products Supplier Manufacturer List Catalog
Meter for Liquid GasGas MeterGas Flow MeterRoots Type Gas Meter
Wenzhou Heyi Electrical Co., Ltd.
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Product Description IntroductionSuitable for measuring natural gas, liquefied gas, gas, methane, carbon dioxide, oxygen and other rare gases. The measured gas shall be monophase gas (including air) and free of impurities such as particles and fibers.Working principleWhen the gas passes through the flow meter, the pressure difference generated at the outlet and inlet acts on a pair of Roots wheels coupled with a high-precision synchronous gear, thereby driving the Roots wheels to rotate. The Roots wheels are connected to the inner wall of the housing and the gland Between the inflation and exhaust of the enclosed space formed between cycles, the rotation speed of the Roots wheel is proportional to the volume of gas passing through the flow meter.Product displayTechnical parameterTechnical parameter nameDescriptionNominal Diameter25/20 mmFlow-rate range0.08~10 m3/hStartup flow rate0.016 m3/hMaximum pressure loss0.10 KParange ratio64:1Nominal Pressure20~80 KPaConnection typeIntubationAmbient temperature-20~+40oCMedium temperature-25~+55oCRelative humidity5~9%Atmospheric pressure70~106KPaProduct features1.The circuit adopts surface mount technology, with compact structure, strong anti-interference ability and high stability2. High performance microwave processor and modern microwave technology, precision processing, powerful performance3. Waist wheel measurement, low pressure loss, high precision, low maintenance, high reliability, can measure weak airflowProduct advantage1. Compact structure and strong stability:The surface mount technologyis adopted on the circuit, which has compact structure, strong anti-interference ability and high stability.2. Precision head: the meter head adopts high-techwhich has stable structure, strong anti-interference ability, and accurate reading.3. Superb technology:Itadoptshigh-performance microwave processor and modern microwave technology, with precise processing and powerful performance.4. Waist wheel measurement: small pressure loss, high accuracy, low maintenance, high reliability, anditcan measure weak airflow also.5. Double protection: Double-layer reinforced bodyand integrally formedmake it strong and durable; the lead seal can prevent cheating operation.Communication mode :1. LORAWAN(1)Component: Lorawan has four partsNode: gas meter, water meter, position , alertor etc.Gateway: receiving dataNetwork platform : Management of equipment in base station, DNSEG control etc.User's data background : data storage and application processing for userThe main chip of LORAWAN communication module adopts the high-performance embedded ARM cortex-m3 32-bit RISC controller, whichensures the stability of the device with multilevel software detection and multiple hardware protection mechanisms.It is composedof the powerful ARM cortex-m3 32-bit RISC microcontroller and Lorawan wireless spread spectrum chip .(2)Product features:1. measurement function* real-time pulse counter accumulates flow* strong magnetic detection trigger alarming info.2. historical data store locally* the data during latest 90 days store every one hour* the data during the latest 180 days stores everyday* the data during the latest 1 year stores every month3. Power supply: one main battery for supplying daily , another one for spare battery4. Main battery capacity level indicator* In each measurement data consumption on the road up the service reported to the battery capacity level suffixü* Low battery threshold :when the battery capacity is less than 20%, it will trigger low battery alarm and the low batteryalarming info.will be reported every 24 hours untill spare battery switch threshold* Battery switch threshold : capacity of 10% will trigger the switch of spare battery5. Spare battery switch only in the following cases; otherwise, use the main battery.* Pull out the battery or the battery does not exist* the main battery theshold is 10%* The switch of spare battery is automatic so that i will not be outage6. Spare battery function* Water flow control partial measurement* historical data storage* spare battery exceeds 7 days at least* When spare battery is used , the alarming info. Of spare battery will be reported to server7. The spare battery protection in transportation* Prior to on-site activation, the meter is equipped with only spare batteries, and in the warehouse or during transportation,protection will be provided to prevent the consumption of the spare batteries.8. Battery life: 69. operating temp.:-5~+ 85oC10. LED indicator: indicates LORA event11. Manual triggering lorawan uplink for testing12. Wireless technology: lorawan in EU86813. LoRaWAN class: class A14. LoRaWAN reports regularly measured data for a period of 24 hours by defaultThe message payload includes* the latest accumulated measured data* statue of meter: valve,power, strong magnetic detection* battery capacity* lorawan downlink signal indicator RSSI/SNR15. LoRaWAN fixed time metering data report (ON/OFFconfigurable).LoRaWAN metering data report is triggered every day at fixed time(e.g. 23:00, configurable), and the message payload is the same as the periodic report* the latest accumulated measured data* statue of meter: valve,power, strong magnetic detection* battery capacity* lorawan downlink signal indicator RSSI/SNR16. LoRaWAN alarming info. Uplink report* low battery alarm* spare battery switch alarm* valve error alarm* strong magnetic detection alarm17. LoRaWAN downlink set/inquire* Set up/query LoRaWAN periodic metering data report cycle* Fixed time measurement data report/switch/set up/inquiry/time* Modify accumulated water flow data for calibration* read the data of current accumulated water flow* battery capacity reading* valve control switch Product operating environment1.temperature:-10oC~40oC;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 willbe 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 matters1.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 normally7.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 thebedroom 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 gasmeter must be discharged to prevent accidents10.In case of malfunction, please do not disassemble by yourself, please ask the technical personnel of gas company formaintenance.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.
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