VFD Anti-Vibration Vortex Flowmeter
The VFD Anti-Vibration Vortex Flowmeter is a high-performance instrument that employs advanced digital signal processing technology, setting it apart from conventional vortex flowmeter measurement approaches. It delivers accurate measurement even under pipe vibration levels of up to 1 g and flow velocities as low as 0.3 m/s, making it specifically suited to demanding operating environments.
Technical data
| Accuracy: | Liquid: Class 0.75 / 1; Gas: Class 1 | Nominal Size: | DN15–DN600 |
| Process Pressure: | 1.0/1.6/2.5/4.0 MPa, ANSI 150/ANSI 300 | Process Temperature: | Standard type: -40 to +200°C; High-temperature type: -40 to +300°C |
| Ingress Protection: | IP65 / IP66 / IP67 | Explosion Protection: | Ex ia IIC T1~T6 Ga，Ex db IIC T1~T6 Gb |
| Turndown Ratio: | 1:20 (up to 1:30) | Communication Protocol: | HART / Modbus (RS485) / FF |
Features & Benefits
Excellent Low-Flow Performance
The lower measurable liquid velocity is as low as 0.5 m/s. Combined with FFT spectrum analysis and DSP signal processing, the meter reliably identifies vortex signals even at small signals and low flow velocities—ideal for new plants running at low initial flow or units with fluctuating load.
Superior Vibration Resistance
Dual-sensor differential technology: one probe measures the vortex flow signal while the second specifically detects pipe vibration for real-time compensation. Under strong vibration from pumps, valves, and compressors (up to 3 g acceleration), the meter remains stable and accurate—eliminating the jumpy readings and miscounting common to conventional vortex meters.
Wide Turndown and High-Temperature Adaptation
Turndown up to 1:30, with liquid accuracy 0.5 class and gas accuracy 1.0 class. Media temperature ranges from –40 °C to +350 °C (high-temperature version), handling saturated steam, superheated steam, and high-temperature thermal oil.
Low Maintenance Cost
The entire sensor is a one-piece stainless steel structure with no holes, gaps, or extra gaskets—simple design with minimal maintenance. Transmitters are interchangeable across all sensor sizes: one transmitter fits any bore, drastically reducing spare-parts inventory. A technician needs only carry one transmitter for emergency replacement.
Full Explosion-Proof Range and High-Reliability Design
Available in Ex ia intrinsic safety and Ex db flameproof variants, covering IIC T6 temperature class. Reverse-polarity protection, signal isolation, and strong EMI immunity are built in. With no moving parts, the meter requires essentially no routine maintenance over its service life.
Certifications
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EAC Ex Vortex Flowmeter Certification
EAC conformity certificate under TR CU 012/2011 covering VF series vortex flowmeters for explosive atmospheres in the Eurasian Economic Union (Russia, Kazakhstan, Belarus).
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HART 7 Vortex Flowmeter Registration
FieldComm Group HART 7 registered (Reg. No. L2-06-1000-1253) for VF series vortex flowmeters, conforming to IEC 61158 and GB/T 29910 standards. Enables automatic DCS device recognition and remote configuration.
Applications
Steam Metering
Saturated steam and superheated steam (petroleum, chemical, and heating networks)
Compressed Air
Air compressor stations and plant piping networks
Chemical Process Gases
Nitrogen, air, oxygen, etc.
High-Temperature, High
Pressure Conditions — Heavy industries such as refining, power, and metallurgy
Food & Beverage
Industries & Applications — Food & Beverage Steam Measurement（Saturated & Superheated Steam） Clean Gases（N₂, CO₂, Compressed Air） Process Liquids（CIP Fluids, Hot Water, Purified Water） Energy Management（Steam Consumption & Cost Allocation）
Case Studies
Hubei Yihua Fine Chemical Co., Ltd.
80,000 t/a Sodium Hydrosulfite Upgrade and Renovation Project Based on Comprehensive Utilization of Sulfur Residue: Withstands vibration levels of up to 3 g and measures flow velocities as low as 0.2 m/s.
Guangdong Jianneng Chemical Technology Co., Ltd.
40,000 t/a Automotive Aerosol Project: Applied to aerosol batching and DCS-based intelligent batching systems for corrosive media measurement.
Shenghong Refining & Chemical (Lianyungang) Co., Ltd.
Feedwater Metering for the Cogeneration Boilers Supporting the Refining & Chemical Integration Project: 6,800 t/h high-temperature, ultra-high-pressure circulating fluidized bed boilers.
