Pneumatic Air Flow Controller
An automatic pneumatic instrument that regulates airflow rates in compressed air systems by sensing and adjusting flow to maintain desired levels. Classified under HTS 9032.81.00 for pneumatic automatic controlling apparatus that stabilizes variables like flow against disturbances. Used in automation lines and HVAC systems.
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More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If manual adjustment only, without automatic control
Non-automatic pneumatic valves are under 8481, as they lack the measuring and stabilizing function required for 9032.
If for industrial use focused solely on flow measurement, not control
Pure measuring instruments for liquids/gases fall in 9026; control function shifts to 9032 per Chapter 90 notes.
If integral to a complete compressor unit
Regulators principally for specific compressors are parts of 8414, not standalone automatic instruments.
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Import Tips & Compliance
• Provide evidence of automatic feedback loop (sensors + actuators) to distinguish from manual flow meters
• Label as 'pneumatic automatic regulator' clearly; mislabeling leads to reclassification and penalties
• Ensure CE marking for EU-sourced units if re-exporting, as it impacts U.S. customs valuation
Related Products under HTS 9032.81.00
Hydraulic Pressure Regulator Valve
This automatic regulator maintains constant hydraulic pressure in industrial systems by continuously measuring and adjusting fluid pressure to a set value. It falls under HTS 9032.81.00 as a hydraulic automatic controlling instrument designed for stabilizing pressure against disturbances in hydraulic circuits. Commonly used in heavy machinery and manufacturing equipment.
Electro-Pneumatic Proportional Pressure Regulator
This hybrid regulator uses electrical signals to proportionally control pneumatic pressure, automatically maintaining setpoints via continuous measurement. It qualifies for HTS 9032.81.00 as a pneumatic automatic controller, even with electrical dependence, per Chapter 90 definitions. Ideal for precision robotics and process control.
Hydraulic Level Control Valve for Hydraulic Reservoirs
Automatically regulates hydraulic fluid levels in reservoirs by sensing and adjusting flow to maintain stable levels. Falls under HTS 9032.81.00 as a hydraulic instrument for automatic control of liquid levels per Chapter 90 Note 7(a). Used in construction equipment and presses.
Pneumatic Temperature Controller for Air Lines
Pneumatic apparatus that automatically controls air temperature in pneumatic lines by regulating flow based on temperature feedback. Classified in HTS 9032.81.00 for pneumatic automatic control of temperature variables. Applied in food processing and cleanroom environments.
Hydraulic Sequence Valve Controller
Automatic controller that sequences hydraulic valve operations by monitoring pressure and flow, ensuring proper machine cycle order. HTS 9032.81.00 covers this hydraulic automatic regulating instrument for process control. Common in injection molding machines.
Pneumatic Back Pressure Regulator
Maintains constant upstream pneumatic pressure by automatically throttling flow based on real-time measurements. Under HTS 9032.81.00 as pneumatic automatic regulator for pressure control. Used in gas delivery and testing systems.