Company: Dalian Zero Instrument Technology Co., LTD
Customer Location: Pakistan
Product: Integrated Vortex Flowmeter with Temperature and Pressure Compensation
Industry: Gas and Steam Measurement
Customer Requirement and Context
A customer in Pakistan required a high-precision, reliable flowmeter to measure gas/steam flow rates under varying pressure and temperature conditions. The target was a durable solution suitable for harsh industrial environments. However, one of the challenges was achieving 0.25% accuracy, which the company needed to address effectively.
Solution Offered by Dalian Zero Instrument Technology
1. Selected Product:
Temperature and Pressure Compensation Integrated Vortex Flowmeter (Model LUGB-D) with the following specifications:
- Accuracy: 1.5% (suitable for gas/steam applications)
- Power Supply: 24V DC
- Output: On-site display + 4-20mA analog signal + HART protocol
- Material: 304 Stainless Steel
- Connection: ANSI 300lb flange connection
- Protection Class: IP65 (non-explosion proof)
- Process Temperature: Below 250°C
- Measuring Range: DN250: 970-5500 m³/h
- Flanges: Not included in the offer (customer to supply bolts, gaskets)
Challenges Addressed:
- Accuracy Constraints: The flowmeter is calibrated to 1.5% accuracy as per industry standards for gas and steam applications, which met most requirements but was short of the customer’s original 0.25% goal.
- Power Supply Constraints: The flowmeter runs on 24V DC power, aligning with the customer’s energy infrastructure.
- Environmental Suitability: The stainless-steel construction and IP65 rating ensured suitability for industrial environments prone to dust and moisture.
Installation and Operation Guidelines
Based on the technical manual the following recommendations were followed during installation:
Inlet and Outlet Requirements:
- A minimum of 10 times the pipe diameter as upstream length and 5 times the pipe diameter downstream ensured stable flow measurement.
- Proper installation was critical to avoid measurement errors caused by turbulence or cavitation.
Electrical Setup:
- The 24V DC external power supply was connected following the LUGB-D wiring instructions.
- The device’s 4-20mA analog output and HART communication protocol facilitated seamless integration with the customer’s existing monitoring systems.
Calibration Requirements:
- The product was factory-calibrated, and its unique K-factor was logged on the calibration certificate.
- Regular annual calibration was recommended to maintain measurement precision.
Performance and Feedback
The customer reported stable performance during initial operations. While the target accuracy of 0.25% was not achieved, the 1.5% precision was deemed acceptable given the operating conditions and nature of the medium (gas/steam). The integrated compensation feature allowed the flowmeter to adjust readings dynamically for changes in temperature and pressure, improving reliability.
Conclusion and Lessons Learned
The export of the integrated vortex flowmeter to Pakistan was a success, demonstrating Dalian Zero Instrument Technology Co.’s capability to provide tailored solutions for demanding industrial applications. Key takeaways include:
- The importance of setting realistic accuracy expectations for gas/steam measurement applications.
- Ensuring proper installation to avoid flow disturbances and maintain performance.
- The value of supporting customers with comprehensive installation and calibration guidelines.
This case showcases Dalian Zero Instrument Technology’s commitment to quality and technical excellence, reinforcing the importance of collaboration and communication in meeting customer requirements.