Pulp Refiner Disc Segment
Replaceable grooved disc segment for double-disc refiners that mechanically fibrillate pulp fibers to improve paper strength. Falls under HTS 8439.91.90.00 as a part of pulp-making machinery from cellulosic materials. Segments are tailored for specific pulp types like softwood or hardwood.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for paper finishing refiners
Parts of paper/paperboard making or finishing refiners are separately provided for.
If imported as individual milling blades
If not presented as a machinery part, it may be seen as a plain knife blade for mills.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Provide refiner model compatibility docs; note wear patterns for valuation; beware of classification shifts if sold for non-cellulosic refining
Related Products under HTS 8439.91.90.00
Pulp Press Roll Segment
Segmented roll covering for pulp presses that squeeze water from pulp before drying. Classified in HTS 8439.91.90.00 as part for pulp-making from cellulosic materials. Provides high-nip pressure for efficient dewatering.
Continuous Digester Feed Valve Actuator
Pneumatic actuator for feed valves in continuous pulp digesters controlling chip/liquor flow. HTS 8439.91.90.00 part for pulp-making machinery of fibrous cellulosic material. Ensures precise process control in high-volume production.
Pulp Screener Basket
Cylindrical slotted basket for pulp screening equipment that removes shives and debris from pulp stock. HTS 8439.91.90.00 as part for machinery making pulp of fibrous cellulosic materials. Precision slots ensure clean pulp for papermaking.
Digester Peeler Blade
Specialized blade for batch digester peelers that remove spent chips from vessel walls post-cook. Part of pulp-making machinery, HTS 8439.91.90.00 for fibrous cellulosic pulp processes. Extends digester life by thorough cleaning.
Recovery Boiler Liquor Nozzle
Black liquor spray nozzle for kraft pulp recovery boilers that burn spent cooking liquor to recover chemicals. While boiler-focused, classified as part of pulp-making machinery under HTS 8439.91.90.00 due to integral role in chemical pulping cycle.
Pulp Digester Agitator Blade
A heavy-duty stainless steel blade designed for installation in pulp digesters to mix and circulate wood chips during the chemical pulping process. It falls under HTS 8439.91.90.00 as a part specifically for machinery used in making pulp from fibrous cellulosic materials, such as kraft digesters. The blade ensures uniform cooking and prevents material buildup.