Coconut-Shell Granular Activated Carbon for Point-of-Use Drinking-Water Filter Cartridges

This page covers coconut-shell granular activated carbon intended for point-of-use drinking-water filter cartridges. The grade is supplied as loose granules for cartridge filling lines, where the carbon forms a fixed bed inside the cartridge housing. It is distinct from the general coconut-shell granular grade: the material is positioned here around cartridge filling and the operating conditions of point-of-use drinking-water filters.

Where this grade is used

Point-of-use drinking-water filter cartridges are typically filled with granular activated carbon and operated as a fixed bed with a defined contact time and flow rate. Buyers use this grade when they need a coconut-shell granular carbon whose particle size suits their filling equipment, whose bed can be packed consistently, and whose batch values can be documented before an order is confirmed. Because the cartridge is a closed unit, the filling line and the cartridge design set the practical limits on particle size, bed density and handling.

What to confirm before ordering

Particle size. The selected specification plan gives a mesh range of 4 to 40 as supplied, measured on the batch sample. Confirm the mesh range your cartridge filling line requires: the acceptable range depends on your filling method, the cartridge geometry and the target bed packing. A range that suits one filling line may not suit another, so mesh should be agreed against your process rather than assumed from a general grade.

Hardness. The plan states a hardness of at least 95 as a series reference value, with the batch value confirmed before quotation. Hardness is relevant to handling and to the mechanical condition of the granules before and during filling; confirm the value on your batch sample if your line is sensitive to fines or attrition.

Trial sampling. Ask for a sample from the intended production batch before committing to a full order. A trial sample lets you check how the granules run on your filling line, how the bed packs, and whether the supplied moisture and mesh match your expectations. Sampling is a confirmation step, not a substitute for the agreed specification.

Batch testing. Request the batch test values for the properties that matter to your application and confirm how the sample was taken and measured. The values shown on this page are series reference values unless a remark states otherwise; the batch value is confirmed before quotation. Ask which test methods are used and whether the batch report is issued per production batch.

Packing. Confirm the packing format, bag size and labelling that suit your receiving and filling operations, and check that the packing protects the carbon during transport and storage before the cartridge is filled.

Selected specification at a glance

The selected plan covers iodine adsorption of 900 to 1600 mg/g (reference range, batch value confirmed before quotation), hardness of at least 135 (reference value, batch value confirmed before quotation), moisture of 5% or less as supplied on the batch sample, ash of 10% or less, bulk density of 0.45 to 0.55 g/cm3, pH of 6.5 to 8.5, mesh of 4 to 40, and a maximum fines value of 10 (reference value, batch value confirmed before quotation). Confirm the test basis and the batch report with the supplier.

This page does not state guaranteed contaminant removal, certifications, prices, stock or lead times. Those points depend on the approved documents and the batch you are quoted. To discuss a cartridge filling application, share your target mesh range, expected filling method and the batch properties you need documented, and request a trial sample and batch test report for review.