Product Introduction
The VEGA VEGABAR 81 is a process pressure transmitter equipped with a chemical seal system for measuring pressure and level in demanding industrial environments. Its process-adapted diaphragm seals help protect the measuring system when handling high-temperature, highly corrosive, or otherwise challenging media.
Key Features
- Chemical seal system for high-temperature and corrosive process media
- Pressure measuring ranges up to 1,000 bar, depending on configuration
- Process temperature range from −90 to +400 °C
- Accuracy options of 0.1% and 0.2%, depending on version
- Multiple diaphragm materials and coatings for improved media compatibility
- Flexible process connections, including threaded, flange, and hygienic fittings
- Compatible with VEGABAR Series 80 sensors for electronic differential pressure measurement
- SIL 2 qualification available for applicable configurations
Applications
- Pressure monitoring in chemical and petrochemical reactors
- Steam pressure control in steam drums
- Flue gas exhaust pressure measurement in waste incineration plants
- Pipeline pressure measurement in food and dairy processing
- Pressure monitoring in LNG tanks
- Pressure and level measurement in distillation columns and process vessels
Technical Highlights and Selection Considerations
The VEGABAR 81 covers pressure ranges from −1 to +1,000 bar and process temperatures from −90 to +400 °C, depending on the selected configuration. Its chemical seal system can be customized with different diaphragm materials and coatings, including stainless steel, tantalum, and selected nickel alloys.
When selecting a model, consider the process temperature and pressure, chemical compatibility, diaphragm material, seal design, process connection, and required output or safety approvals. Confirm the exact operating limits and available features for the selected configuration before ordering.
Frequently Asked Questions
1. What is the VEGA VEGABAR 81 used for?
It is designed for process pressure and level measurement in high-temperature, corrosive, and other demanding industrial applications.
2. What is a chemical seal?
A chemical seal separates the process medium from the pressure measuring system through a diaphragm and a suitable fill system, helping protect the instrument from aggressive or difficult media.
3. What is the maximum process temperature?
The maximum process temperature can reach 400 °C, depending on the selected chemical seal and installation configuration.
4. What is the maximum pressure range?
The measuring range extends up to 1,000 bar, depending on the model and configuration.
5. Which diaphragm materials are available?
Options include stainless steel 316L, tantalum, and selected corrosion-resistant alloys and coatings. The correct material depends on the process medium and operating conditions.
6. Can the VEGABAR 81 be used for level measurement?
Yes. It can be configured for level measurement in suitable vessels and process applications.
7. Can it measure differential pressure?
Yes. It can be combined with compatible VEGABAR Series 80 sensors to perform electronic differential pressure measurement.
8. Which process connections are available?
Options include threaded connections, flanges, and hygienic fittings. Availability depends on the required configuration.
9. What should be considered when selecting a VEGABAR 81?
Review the process pressure, temperature, medium compatibility, chemical seal design, diaphragm material, process connection, output signal, and required certifications.
