Measurement Challenges of Electromagnetic Flowmeters Under High-Temperature Operating Conditions

In industrial fields such as chemical engineering and metallurgy, flow measurement of high-temperature media has always been a technical challenge. Traditional electromagnetic flowmeters commonly suffer from reduced accuracy and signal drift in environments exceeding 80℃, and in severe cases may even cause permanent sensor damage. Through long-term on-site investigations, the engineering team of Xi'an Shenghongchuang Instrument Co., Ltd. found that measurement errors caused by high-temperature operating conditions mainly stem from three core factors: differences in the thermal expansion coefficients of electrode materials, the temperature resistance limits of lining materials, and the temperature drift of electronic components.

Core Technological Innovations of the HKE Series

To address these pain points, HKE electromagnetic flowmeters adopt a triple-protection design:

• Special PTFE Lining: Modified PTFE material with thickness increased to 3.5mm, extending the temperature resistance range to -40℃~180℃
• Optimized Insert Structure: 316L stainless steel electrodes homologous to the UHLDB series, combined with RXLDB sealing technology to achieve zero leakage
• Temperature Compensation Algorithm: Built-in RTD temperature sensor to correct signal deviation caused by temperature changes in real time

Measured Data in a 120℃ High-Temperature Environment

In the CNAS-certified laboratory of Xi'an Shenghongchuang, HKE electromagnetic flowmeters were comparatively tested against mainstream models such as LY-LDE-C and XFC. The test medium was a 120℃ hot water circulation system, with a flow velocity range of 0.5-5m/s, operating continuously for 72 hours. The key data are as follows:

Breakthrough Performance of PTFE Rubber Lining

The test specifically verified the durability of the insert-type PTFE rubber lining. After continuous thermal shock testing (120℃⇄25℃ cycle 100 times), the lining of the HKE electromagnetic flowmeter showed no peeling or cracking, and its insulation resistance remained above 10MΩ, fully complying with the requirements of the GB/T18659-2018 standard. In comparison, ordinary rubber linings show obvious hardening and deformation under the same conditions.

Typical Application Scenarios and Selection Recommendations

Based on the application experience of the JCLDBE series in the petrochemical industry, we recommend giving priority to HKE electromagnetic flowmeters for the following operating conditions:

1. High-Temperature Condensate Recovery Systems: Pressure 0.6-4.0MPa, temperature 90-150℃
2. Molten Salt Heat Exchange Units: Must be used with HPLDE reinforced electrodes
3. High-Temperature Food Sterilization Processes: RT-LDE hygienic design compliant with FDA standards

Differentiated Advantages Over Similar Products

Compared with the conventional design of XFC electromagnetic flowmeters, the HKE series has significant advantages in three aspects:

• Uses military-grade AD conversion chips, reducing the temperature drift coefficient by 60%
• Unique flow field correction technology, reducing the required straight pipe length from 10D to 5D
• Standard Modbus-RTU protocol, making it more convenient to interface with DCS systems

Professional Maintenance Recommendations

To ensure the long-term stability of HKE electromagnetic flowmeters in high-temperature environments, the technical team of Xi'an Shenghongchuang provides the following maintenance recommendations:

• Check lining thickness every 6 months, replace if wear exceeds 0.5mm
• When shutting down, first cool down to below 80℃ before cutting off the power
• Regularly calibrate grounding resistance to ensure ≤4Ω

Industry Certifications and Quality Assurance

HKE electromagnetic flowmeters have passed the following authoritative certifications:

• CE certification（EN 61326-1:2013）
• Explosion-proof certification（Ex d IIC T6 Gb）
• National Pattern Approval Certificate for Measuring Instruments（CPA）

Conclusion and Technical Support

Measured data prove that HKE electromagnetic flowmeters can still maintain ±0.7% measurement accuracy in a 120℃ high-temperature environment, and their insert-type PTFE rubber lining design effectively solves the industry challenge of measuring high-temperature media. As a national high-tech enterprise, Xi'an Shenghongchuang Instrument Co., Ltd. can provide full-process technical support from selection guidance to installation and commissioning.

Contact our technical engineers now: Call 029-xxxxxxx to obtain customized solutions, or visit the official website to view the technical parameters of the full series of flow control equipment such as LY-LDE-C and UHLDB.