Blow Tank Pressure Valve
High-pressure relief valve for pulp blow tanks that discharge cooked pulp from digesters safely. Classified in HTS 8439.91.90.00 as a part for pulp-making machinery handling fibrous cellulosic materials. Critical for process safety and continuous operation.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If generic industrial pressure relief valve
General valves not specified for pulp machinery default to Chapter 84 appliance valves.
If used in downstream paper processing tanks
Applies to parts of paper-making tanks rather than pulp blow tanks.
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Import Tips & Compliance
• Include pressure ratings and ASME stamps in filings; test certificates mandatory; pitfall: confusing with general steam valves under 8481
Related Products under HTS 8439.91.90.00
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Digester Peeler Blade
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Recovery Boiler Liquor Nozzle
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Pulp Digester Agitator Blade
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