Machinery for making pulp of fibrous cellulosic material
Machinery for making pulp of fibrous cellulosic material or for making or finishing paper or paperboard. > Machinery for making pulp of fibrous cellulosic material > Machinery for making pulp of fibrous cellulosic material
Duty Rate (from China)
Products classified under Tariff item 8439.10
Atmospheric Diffuser Washer
An atmospheric diffuser washer is a key component in the pulp production process, operating at atmospheric pressure to displace black liquor from brownstock pulp using countercurrent washing. This machinery improves pulp cleanliness and is integral to processing fibrous cellulosic material, falling directly under tariff item 8439.10.00 for machinery for making pulp.
8439.10.00Batch Pulp Digester
A batch pulp digester is a cylindrical vessel loaded in batches with wood chips and cooking liquor to produce chemical pulp through intermittent cycles, commonly used in smaller mills for flexible production. This machinery is essential for making pulp of fibrous cellulosic material, fitting the scope of tariff item 8439.10.00.
8439.10.00Brown Stock Pump for Pulp Lines
A brown stock pump for pulp lines is a heavy-duty centrifugal pump designed for transferring brownstock pulp slurry at 10-15% consistency post-digestion, with an open impeller to prevent fiber clogging. This pump is used in cellulosic pulp processes and is classified under tariff item 8439.10.00 as machinery for making pulp of fibrous cellulosic material.
8439.10.00Chip Metering Feeder
A chip metering feeder is a precision screw feeder that accurately meters wood chip flow into digesters, controlling inventory and digester filling for consistent pulp production from cellulosic material. This machinery is essential for the pulping process and falls under tariff item 8439.10.00 for machinery for making pulp of fibrous cellulosic material.
8439.10.00Chip Presteaming Bin
A chip presteaming bin is a vessel that heats wood chips with low-pressure steam to soften fibers and remove air before pulping, enhancing impregnation efficiency. This equipment is an essential first step in chemical pulp production from cellulosic material, fitting tariff item 8439.10.00 for machinery for making pulp.
8439.10.00Continuous Wood Chip Digester
A continuous wood chip digester is an automated digester that continuously feeds wood chips through cooking zones for efficient pulp production from cellulosic fibers, featuring stratified impregnation and cooking stages for optimal lignin removal. This machinery is central to making pulp of fibrous cellulosic material, falling under tariff item 8439.10.00.
8439.10.00Defibrator for Mechanical Pulp
A defibrator for mechanical pulp is high-speed rotor machinery that mechanically separates wood fibers through grinding and refining to produce mechanical pulp without chemicals, used for newsprint production from cellulosic material. This machinery is used for making pulp of fibrous cellulosic material, fitting tariff item 8439.10.00.
8439.10.00Digesting Tower Agitator
A digesting tower agitator is a heavy-duty propeller agitator installed in continuous digesters to ensure uniform circulation of cooking liquor through the wood chip column during pulp production, with variable speed for delignification control. This machinery is integral to making pulp of fibrous cellulosic material, falling under tariff item 8439.10.00.
8439.10.00Knotter Screen for Pulp
A knotter screen for pulp is a pressure screen that removes uncooked fiber knots and shives from cooked pulp slurry, ensuring pulp quality from cellulosic digestion, with rotating foils for self-cleaning. This machinery is used in the pulp-making process and falls under tariff item 8439.10.00 for machinery for making pulp of fibrous cellulosic material.
8439.10.00Kraft Pulping Digester
A kraft pulping digester is a large pressure vessel used in the kraft process to cook wood chips with chemicals to separate lignin and produce pulp from fibrous cellulosic material, operating under high temperature and pressure. This machinery is essential for making pulp of fibrous cellulosic material, fitting tariff item 8439.10.00.
8439.10.00Mechanical Pulp Refiner
A mechanical pulp refiner is a double-disc refiner that develops fiber properties through controlled mechanical action on groundwood pulp from cellulosic material, with adjustable plate patterns to control freeness and strength. This machinery is used for making pulp of fibrous cellulosic material, falling under tariff item 8439.10.00.
8439.10.00Pulp Press Feeder
A pulp press feeder is a screw press feeder that dewaters pulp from 1% to 30-40% consistency before twin-roll pressing, recovering liquor in cellulosic pulp lines, with a progressive cavity design handling varying consistencies. This machinery is used in the pulp-making process and falls under tariff item 8439.10.00 for machinery for making pulp of fibrous cellulosic material.
8439.10.00Pulp Washing Drum
A pulp washing drum is a rotating vacuum drum that separates cooking liquor from pulp fibers post-digestion, recovering chemicals and cleaning cellulosic pulp, with a twin-roll design for multi-stage washing. This machinery is integral to the pulp-making process and falls under tariff item 8439.10.00 for machinery for making pulp of fibrous cellulosic material.
8439.10.00Sulfite Pulp Cooker
A sulfite pulp cooker is machinery using calcium or magnesium bisulfite solutions to cook wood chips for sulfite pulp production, yielding high-brightness pulp for specialty papers, and maintaining acidic cooking conditions for fiber separation. This machinery is used for making pulp of fibrous cellulosic material, fitting tariff item 8439.10.00.
8439.10.00Wood Chip Impregnator
A wood chip impregnator is equipment that pre-treats wood chips by impregnating them with cooking liquor before digestion, improving pulp yield from fibrous cellulosic material, with features for downflow or upflow liquor penetration. This machinery is used in the pulp-making process and falls under tariff item 8439.10.00 for machinery for making pulp of fibrous cellulosic material.