Product Introduction
The VEGA VEGAFLEX 86 is a guided wave radar transmitter for continuous level and interface measurement of liquids in demanding industrial processes. It sends microwave pulses along a cable, rod, or coaxial probe and evaluates the reflected signals to determine liquid level or the interface between two liquids. Its robust design makes it suitable for high-pressure and high-temperature applications in chemical processing, petrochemical plants, energy facilities, and oil and gas installations.
Key Features
- Guided wave radar (TDR) technology for continuous level and interface measurement.
- Measuring range up to 75 m for suitable configurations.
- Measurement accuracy of ±2 mm, according to published product data.
- Extreme process conditions: temperatures from -196 to +450 °C and pressures from -1 to +400 bar, depending on configuration.
- Multiple probe designs: cable, rod, and coaxial versions.
- Second process seal (Second Line of Defense) for additional process protection.
- Reliable measurement in applications involving foam, condensation, or product buildup.
- Multiple communication options, including 4–20 mA/HART, PROFIBUS PA, FOUNDATION Fieldbus, and Modbus, depending on the selected version.
- SIL2 qualification and various hazardous-area approvals available for suitable configurations.
Applications
- Level measurement in steam boilers
- Level and interface measurement in distillation columns
- LPG and other pressurized gas storage vessels
- Chemical and petrochemical process tanks
- Oil and gas processing facilities
- High-temperature liquid storage and processing systems
- Bypass chambers and vessels operating under extreme pressure conditions
Technical Highlights and Selection Considerations
The VEGAFLEX 86 supports process temperatures from -196 to +450 °C and process pressures from -1 to +400 bar, with limits dependent on the selected probe, process connection, seals, and configuration. Wetted materials include 316L stainless steel and Alloy C22 in specified versions. Available connections include threaded fittings and flanges.
When selecting a transmitter, consider the liquid properties, interface conditions, vessel geometry, probe length, pressure and temperature requirements, material compatibility, and required output signal. For saturated-steam applications, a special reference probe is available to compensate for density-related effects.
Frequently Asked Questions
1. What is the VEGA VEGAFLEX 86 used for?
It measures liquid level and liquid-to-liquid interfaces in tanks, boilers, bypass chambers, and other demanding process installations.
2. How does the VEGAFLEX 86 work?
It sends microwave pulses along a probe. Reflections from the liquid surface or interface are evaluated to determine the measured level.
3. What is the maximum measuring range?
The published maximum measuring range is 75 m, depending on the probe and application.
4. Can it operate at very high temperatures and pressures?
Yes. Selected configurations support process temperatures up to +450 °C and pressures up to 400 bar. Verify the ratings for the exact assembly before ordering.
5. Can the VEGAFLEX 86 measure the interface between two liquids?
Yes. It supports interface measurement when the liquids and their dielectric properties provide suitable reflection conditions. Application suitability should be confirmed for the specific media.
6. Which probe types are available?
Options include cable, rod, and coaxial probes. The appropriate type depends on the vessel geometry, installation conditions, and process requirements.
7. Which output signals are available?
Depending on the version, outputs include 4–20 mA/HART, PROFIBUS PA, FOUNDATION Fieldbus, and Modbus. Confirm the required communication protocol when specifying the instrument.
