Nearly 70 Years of Expertise in Flow Measurement! Hefei Jingda Volumetric Flow Meters: Core Strength for Precision

In 1958, Hefei Instrument General Factory, the predecessor of Hefei Jingda Instruments, became one of the first four designated manufacturers of flow meters in China, embarking on a journey of deep cultivation in volumetric flow meters. With nearly seventy years of technological iteration and market accumulation, Jingda has grown into a leading brand in industrial flow meters. It not only mass-produces almost all types of volumetric flow meters, including oval gear, dual-rotor, lobe, and vane types, but also serves as the main editor of multiple national and industry standards, defining industry quality with its technological expertise.
In critical fields, Jingda is a trusted choice for national key projects: it is one of the first batch of contractors for the localization of national nuclear power instrumentation and the sole designated supplier of oval gear flow meters for nuclear power plants. It also serves state-owned enterprises such as PetroChina, Sinopec, China Shipbuilding, and military equipment suppliers. Today, its products cover multiple industries, including petrochemicals, power generation, and new energy, and have steadily expanded from the domestic market to Southeast Asia, the Middle East, and other overseas regions.

1. LC Series Oval Gear Flow Meters: The “Evergreen” for High-Temperature and High-Viscosity Applications

As the oldest and most typical type of volumetric flow meter, the industrial production of oval gear flow meters in China began in 1958 with the technology introduced by Hefei Instrument General Factory. Hefei Jingda is the inheritor and innovator of this technology, not only compiling the first domestic industry standard for “Oval Gear Flow Meters,” which was implemented in 2016, but also developing it into a “precision benchmark” covering multiple scenarios.

Its core principle is achieved through a pair of precisely meshing oval gears: the fluid drives the gears to rotate, and the gears and the casing form a fixed-volume metering chamber. By counting the number of rotations, the flow rate can be accurately calculated. Key data and outstanding advantages are as follows:

• Accuracy: 0.2~0.5 grade, precise and reliable measurement;
• Caliber range: Covering DN10~DN200, suitable for needs from low flow to conventional flow;
• Temperature adaptability: -20℃~200℃, supporting high-temperature customized versions;
• Pressure resistance: PN10~PN63, suitable for conventional industrial pressure conditions;
• Viscosity adaptability: Ultra-wide range of 0.5~100000 mPa.S, stable measurement even for high-viscosity media;
• Customization capabilities: Cast iron, stainless steel and other materials are available, supporting flange/threaded connections, and providing special structures such as high-temperature jackets and marine vertical types.

Its rich adaptability allows it to be widely used in metering scenarios for various media such as lubricating oil, syrup, and acid-base solutions.

2. LBJ Series Scraper Flowmeter: The “Anti-clogging Pioneer” for Viscous and Impurity-Containing Media

For ultra-high viscosity, easily solidified, and impurity-containing media that are difficult for conventional flowmeters to handle, the LBJ series scraper flowmeter developed by Hefei Jingda fills the technical gap in domestic viscous media metering, becoming a dedicated device for “difficult-to-measure media” such as crude oil and residual oil.

It uses a single-rotor driven scraper rotation as its core principle. When the fluid drives the scraper to move, it achieves precise measurement through the metering chamber between the scraper and the shell, and can also scrape away solidified media and avoid small impurities. Key data and advantages are as follows:

• Accuracy: 0.2~0.5 grade, still stable under high flow conditions;
• Temperature adaptability: -20℃~60℃, supporting high-temperature customization;
• Protection level: IP66, meeting outdoor dustproof and waterproof requirements;
• Output signal: 4~20mA, pulse + HART, compatible with industrial control systems;
• Core advantages: Anti-clogging and anti-jamming, robust and wear-resistant, long service life. These characteristics enable stable, clog-free operation in scenarios such as crude oil transportation and molten asphalt production.

3. LL Series Lobe Flow Meter: The “Lightweight Benchmark” for Light, Clean Liquids

The history of lobe flow meters is second only to that of oval gear flow meters. The technology was first introduced and manufactured in China by the Chongqing Instrument Factory, established in 1958. Hefei Jingda inherited this technological legacy and not only drafted the first domestic industry standard for “Lobe Flow Meters,” implemented in 2017, but also became a designated supplier for military vehicle-mounted refueling trucks in China.

Its metering principle is similar to that of oval gear flow meters, achieving measurement through the meshing and rotation of two “8”-shaped lobes. The compact structure brings advantages of small size and light weight. Core data and advantages are as follows:

• Accuracy: 0.2~0.5 grade, meeting the metering requirements for light oils;
• Caliber range: Mainstream DN40~DN150, suitable for light fuel metering scenarios;
• Temperature adaptation: -20℃~60℃, meeting conventional working condition requirements;
• Protection level: IP66 and explosion-proof, suitable for hazardous environments such as oil depots;
• Performance: Easy installation, low failure rate, and stable operation for more than ten years with normal maintenance;

Widely used in scenarios such as gasoline and diesel loading and settlement, and enterprise fuel oil consumption metering.

4. LLT Series Dual-Rotor Flow Meter: The “Quiet New Force” for Medium and Large Calibers

The dual-rotor flow meter was first invented by Japan’s Oval Corporation. Hefei Jingda was the first in China to achieve mass production in 2000, becoming a leader in this new generation of positive displacement flow meters, and also drafted the first relevant domestic industry standard implemented in 2018.

Based on the core structure of dual-rotor transmission, the precise cooperation between the rotor and the casing achieves metering. The wear-resistant surface treatment and excellent sealing performance ensure adaptability to complex media. Key data and advantages are as follows:

• Accuracy: 0.2~0.5 grade, at the industry’s leading level;
• Caliber range: DN25~DN350, covering medium and large caliber, high flow rate requirements;
• Temperature adaptability: -20℃~250℃, high-temperature heat sinks can be configured;
• Outstanding advantages: No pulsation, low noise, strong anti-interference ability;
• Medium compatibility: Resistant to particle wear, suitable for complex media containing impurities.

It performs stably in scenarios such as coal mine coal slurry transportation, environmental protection wastewater treatment containing slag, and petroleum crude oil measurement containing sand.

With nearly seventy years of dedicated experience, Hefei Jingda has built its core strength in positive displacement flow meters with technology as its foundation and quality as its soul. If you have any needs regarding the selection or application of positive displacement flow meters, please feel free to contact us. We will provide professional solutions to ensure your precise measurement.

Tel: +8618956032415
E-mail: jingda1958@gmail.com
WhatsApp: +8618956032415
Address: No.75, Science Avenue, Hi-Tech Zone, Hefei City, China