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The Growing Need for Smart Gas Metering in Modern Networks

Gas distribution networks — whether serving urban households, commercial kitchens, or industrial boiler rooms — face a persistent technical challenge: how to measure gas volume accurately when pressure and flow conditions constantly change. Since gas is a compressible medium, its volume at working conditions can differ meaningfully from its volume at standard conditions, and this gap directly affects commercial settlement between suppliers and users. A smart gas metering system must therefore do more than count pulses; it needs to correct for temperature and pressure in real time, remain stable across a wide flow range, and communicate that data reliably to billing and monitoring platforms.

Kaifeng Xinya Instrument Co., Ltd., operating under the brand Xinya Instrument, has positioned itself as a specialized provider of volumetric gas metering solutions built specifically to address this pain point. Headquartered at No. 1, Ba Qing Wu Road, Jinming Avenue South Section, Kaifeng Demonstration Area, Henan, China, the company integrates intelligent electronic display, mechanical backup, and IoT-enabled prepayment systems into a single metering ecosystem designed for urban gas management.

Core Technology Behind Xinya’s Volumetric Metering

Roots-Wheel Structure and Wide Rangeability

At the heart of Xinya’s product line is a roots-wheel structure with synchronous gears, a volumetric metering method that ensures measurement accuracy independent of flow profile. This design means the flowmeter does not require straight pipe sections for installation — a practical advantage in space-constrained gas stations or retrofit projects. The technical metrics behind this approach are notable: rangeability reaches up to 160:1 or more, and the starting flow is less than 0.02 m³/h, allowing the meter to capture both minimal pilot-light-level consumption and high-load peak demand within a single device. Accuracy classes of 1.0 and 1.5 are supported, aligning with commercial and industrial settlement requirements.

Intelligent Correction for Accurate Commercial Settlement

Beyond mechanical measurement, Xinya consolidates high-precision temperature, pressure, and flow sensors with a volume correction instrument that performs automatic compression factor calculation. This microprocessor-based gas equation correction follows the PV/T principle, with compression factor correction based on SY/T 6143-2004 or SGERG-88 standards. In practical terms, this means the meter converts working-condition flow into standard volume automatically, removing the manual calculation errors that often plague commercial gas billing. The system also supports real-time tracking compensation for temperature and pressure, and it can store at least 8,000 pieces of flowmeter status records — providing an auditable data trail for both operators and regulators.

Product Matrix: From Basic Metering to Full IoT Integration

HR, HRM, HRS Series

Xinya’s Gas Roots Flowmeter Series is built for non-corrosive gases including natural gas, city gas, propane, nitrogen, and carbon dioxide, and is offered in three configurations to match different operational needs:

• The HR Gas Roots Flowmeter is an electronic single-display type designed for digital-first metering. It combines sensors and microprocessors to output standard volume directly, and offers signal diversity through RS485, pulse, and optional 4-20mA outputs, all built on an intrinsically safe electrical design (Exia II CT4Ga).

• The HRM Gas Roots Flowmeter is a mechanical single-display type suited for environments with limited power supply or where mechanical backup is mandatory. Its mechanical counter continues metering without external or battery power, supported by a robust, high-precision machined housing for long service life.

• The HRS Gas Roots Flowmeter combines both mechanical and electronic displays in a single unit, providing data redundancy so that mechanical backup ensures zero data loss even during electronic power failures.

All three series feature a 350° rotating meter head and support both horizontal and vertical installation orientations across DN20 to DN200, giving operators flexibility in how and where the meters are deployed.

Intelligent IC Card Prepayment and IoT Wireless Module

For commercial and industrial users where fee collection and consumption management are recurring challenges, Xinya offers the Intelligent IC Card Prepayment System (-Y Suffix). This system uses a zero-pressure-loss ball valve with a diameter equal to the pipe diameter, and requires users to purchase gas credit before consumption — the valve closes automatically once credit is exhausted. It supports purchases up to 100 million m³ per transaction, addressing the financial control needs of large-volume users.

Complementing this is the IoT Wireless Module (-W Suffix), which enables remote monitoring through GPRS, NBIoT, and Cat1 communication modes, and is compatible with both the Xinya cloud platform and third-party IoT platforms. Together with an RS-485 interface using MODBUS RTU protocol, these modules allow gas utility companies to manage metering, billing, and valve control remotely, including through a WeChat applet for recharge and valve operation.

Reliability, Safety, and Compliance Standards

Given that gas metering equipment often operates in hazardous environments, safety compliance is a foundational requirement rather than an added feature. Xinya’s products carry an Exia II CT4Ga explosion-proof rating and an IP66 protection grade, and comply with a series of recognized standards: GB/T 28848 "Intelligent Gas Flowmeter," JJG 633 "Gas Positive Displacement Flowmeter" verification regulation, OIML R6 international standard, and JB/T 7385 "Gas Waist Wheel Flowmeter" industry standard. The company also established its own enterprise standard, Q/HD 003-2023 "Gas Roots Flowmeter," and holds Product Type Test Certificates numbered 2017F103-35 and 2023F129-35, reflecting a documented compliance history dating back to 2017. Service assurance includes a 5-year continuous battery life for metering, along with dedicated alarm outputs for battery undervoltage and flow overruns, and regular verification cycles of 2 to 3 years depending on accuracy class.

Proven Performance in Real-World Applications

In a documented case involving a large-scale catering facility with high-volume natural gas requirements, an HR-80-G100 gas roots flowmeter with integrated volume correction was deployed to address billing accuracy under varying peak and off-peak loads. The 160:1 rangeability allowed the meter to capture low-flow pilot lights starting at 0.02 m³/h as well as high-load cooking peaks, achieving billing accuracy across all operating conditions.

In an industrial boiler system scenario, the metering system converted 123.11 m³/h of working-condition flow into standard conditions using the integrated PV/T equation, maintaining accuracy within a ±1.0% limit even in a temperature-fluctuating environment. These examples illustrate how the underlying correction technology performs under real operating variability rather than only in controlled laboratory conditions.

Flexible Deployment Across Industries

Xinya’s metering solutions serve a range of sectors, including catering and hotel operations requiring commercial gas settlement, transmission and distribution networks needing metering and regulation, manufacturing facilities relying on industrial boiler gas metering, and civil engineering projects involving residential or civil boiler systems. Customer types span gas utility companies, industrial plant operators, and commercial property managers, all of whom depend on consistent, verifiable metering data for both operational and financial decision-making.

Conclusion

As gas networks continue to demand tighter accuracy and remote manageability, the combination of volumetric precision, intelligent correction, mechanical redundancy, and IoT connectivity becomes increasingly relevant. Kaifeng Xinya Instrument Co., Ltd. has built its product portfolio around these exact requirements, offering operators a metering foundation that is compliant with recognized standards, tested in documented field scenarios, and adaptable across catering, transmission, manufacturing, and civil engineering applications.

https://www.sytcflowmeter.com/
Kaifeng Xinya Instrument Co., Ltd.

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