![]() ![]() On many boilers, air flow is the measured differential between the furnace inlet and the boiler outlet. ![]() (The windbox is the area behind the burner throats that supplies combustion air to the burners.) The differential across the windbox to the furnace can be as high as 25" H 2O, but is not used because each time a register is adjusted, the flow relationship to delta P changes. How Is Boiler Air Flow Measured? Boiler air flow (or air flow on a forced or balanced draft furnace) may be measured with a pitot tube, air foil section, or any calibrated flow restricting device located in the duct that leads from the forced draft fan to the windbox. It is an indication of air flow through the burner throats or total gas flow through the furnace. Draft will increase as firing rate increases and will decrease as firing rate decreases. This differential is caused by the restrictions of the tubes and the preheater in the bridge wall section before the stack. On a vertical petrochemical heater, it is the differential between the furnace inlet (bottom) and the stack. OpreX IT/OT Security Operations Center (SOC)ĭraft is the differential caused by the flow of hot gas through a furnace. OpreX Customer Service Management Software OpreX Data Model Broker / Design Data Validation Predictive Maintenance of Pump Cavitation (Cavitation Detection System)Īdvanced Analytical Instrument Management System (AMADAS)įluidCom™ Chemical Injection Flow Controller ![]() Remote Plant Performance Operation and Remote Consulting (Digital Twin) OpreX Laboratory Information Management System Platform for Advanced Control and Estimation (Advanced Process Control) Cloud Inventory Management Solutions (Web*VMI™) ![]()
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