Other
Machinery for making pulp of fibrous cellulosic material or for making or finishing paper or paperboard (other than the machinery of heading 8419); parts thereof: > Parts: > Of machinery for making pulp of fibrous cellulosic materials: > Other
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Products classified 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.
Wood Chip Impregnator Nozzle Assembly
Precision-engineered nozzle set for wood chip impregnators that pre-treat chips with cooking chemicals before digestion in pulp production. Classified under HTS 8439.91.90.00 as a part of pulp-making machinery for fibrous cellulosic materials. It ensures even chemical penetration for high-quality pulp yield.
Kraft Pulp Washer Screen Plate
Perforated stainless steel screen plate used in vacuum pulp washers to separate black liquor from pulp fibers after digestion. It is a part of machinery for making pulp from fibrous cellulosic materials, hence HTS 8439.91.90.00. The plate's design optimizes washing efficiency and fiber retention.
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.
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.
Chip Feeder Screw Conveyor
Robust screw conveyor section for feeding wood chips into pulp digesters at controlled rates. It is a part of machinery for making pulp of fibrous cellulosic material, under HTS 8439.91.90.00. Ensures consistent chip metering for optimal digestion.
Pulp Pump Impeller
Specialized open-style impeller for medium-consistency pulp pumps transferring slurry between process stages. HTS 8439.91.90.00 covers it as a part for pulp-making machinery from cellulosic fibers. Designed to handle abrasive pulp without clogging.
Defibrator Rotor Assembly
Heavy-duty rotor with beater bars for pulp defibrators that break down pulp laps into slurry. Part of machinery for making pulp from fibrous cellulosic materials, thus HTS 8439.91.90.00. Enhances fiber separation for better pulp quality.
Brown Stock Thickener Drive Gear
Precision drive gear for vacuum rotary thickeners that dewater brown stock pulp prior to bleaching. Classified under HTS 8439.91.90.00 for parts of pulp-making machinery. Provides reliable torque for continuous thickening operations.
Chip Bin Vibrator Motor Mount
Custom vibration isolation mount for motors on wood chip storage bins in pulp mills. Part of pulp-making machinery for fibrous cellulosic material feed systems, HTS 8439.91.90.00. Prevents structural fatigue from continuous vibration.