HVT (HIGH VELOCITY THERMOCOUPLE) TESTING SERVICES
Identify the Current Combustion Status of Your Boiler
Why HVT Testing is Critical for Boiler Performance
High Velocity Thermocouple (HVT) Testing gives you a real-time, high-accuracy window into your boiler’s combustion conditions—right at the heart of the combustion zone. Unlike downstream testing methods, HVT provides data directly from the upper furnace, offering valuable insights that help optimize combustion, improve efficiency, and reduce emissions.
What Does HVT Testing Reveal?
With a specialized HVT probe, SAS Global captures:
- NOx and CO Profiles – Pinpoint emission levels and detect potential combustion inefficiencies.
- Oxygen Profile & Levels – Identify areas of incomplete combustion or excessive air input.
- Temperature Profile – Map temperature variations to detect uneven firing.
- Flue Gas Temperatures – Monitor heat transfer effectiveness and potential fouling.
- Fuel Imbalances – Diagnose uneven fuel distribution between burners.
- Secondary Air Imbalances – Spot inconsistencies in air delivery that impact combustion efficiency.
- Air Leakage Detection – Identify areas where excess air infiltrates the boiler, leading to higher-than-necessary O₂ levels and efficiency losses.
HVT Testing is an essential diagnostic tool that gives you the data-driven insights needed to optimize combustion, reduce emissions, and enhance overall boiler performance.
With SAS Global, you’re not just measuring performance—you’re engineering a smarter, cleaner, and more efficient future.
EXAMPLE DATA
With the utilization of water cooled probes flue gas profiles were obtained with HVT (High Velocity Thermocouple) traverses. HVT traverses were completed on the 40’ wide X 38’ deep upper furnace utilizing four (4) ports. The following graphs illustrates the testing grid on a plan view. Note data is collected on 2 foot increments.
