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The Ranveth sintered activated carbon rod in Ф32×106 mm pairs high-iodine coconut shell carbon with food-grade ion exchange resin in a single sintered block. It filters residual chlorine, off-flavours, colour and heavy metals such as lead and mercury from drinking water, while the resin helps soften the water and reduce scaling. This cartridge is built for household reverse osmosis systems, direct-drinking dispensers, refrigerator water filters and commercial coffee machines. Ranveth is a Chinese filter manufacturer based in Zhongshan, Guangdong.
The performance of this rod comes from how two active media are arranged inside the sintered carbon block. Coconut shell activated carbon is chosen for its high iodine value and uniform micro pore structure, which gives a large surface area for adsorbing chlorine, organic compounds and taste-and-odour molecules. Dispersed through the same block is food-grade ion exchange resin, which exchanges hardness ions and helps capture dissolved heavy metals. Because the resin sits within the carbon matrix rather than in a separate loose bed, water passes both media in one short path, so the cartridge can soften and dechlorinate without adding a second housing.
The manufacturing route is a fully flexible moulding process. Carbon powder, resin and a food-grade binder are combined and sintered into a rigid rod with an even pore network. That structure gives a high initial flow rate at a low pressure drop, and it holds the fines in place so the filter does not shed black powder into the downstream line. The same process allows Ranveth to adjust the outer diameter, inner diameter and length ratio to fit a device, and to weld end caps where a customer’s housing requires them. In practice, the pairing of media and the layer build set the trade-off between efficiency, resistance and service life: more carbon mass and a tighter pore structure raise adsorption capacity and particle retention, while the open, uniform pore network keeps the pressure drop low enough for gravity-fed or low-pressure appliances.
| Item | Detail |
|---|---|
| Product name | Carbon block water filter / CTO filter for water purifiers and refrigerators |
| Core filtration media | High-iodine coconut shell activated carbon plus food-grade ion exchange resin |
| Core performance | Softens water and helps prevent scaling; adsorbs residual chlorine (bleaching powder); removes off-colour and off-odour; captures harmful heavy metals such as lead and mercury |
| Precision and service life | Uniform micro pore structure, high initial flow, high filtration precision and no black powder release; large saturated adsorption capacity and long service life |
| Standard size reference (outer diameter × length, mm) | Ф60×130 / Ф62×240 / Ф37.5×75 / Ф38×57 / Ф40×195 / Ф51×127 / Ф32×126 / Ф32×106 |
| Main end applications | Household reverse osmosis purifiers (pre-RO CTO or post-RO T33), direct-drinking dispensers, side-by-side refrigerator water filters, commercial coffee machines |
| Customisation service | Full OEM/ODM support. Length, diameter and inner/outer diameter ratio can be tooled to the device, with end-cap welding available |
| Quality certification system | Production base of 20,000 m² certified to ISO 9001 and IATF 16949; filter media meet strict drinking-water safety and hygiene standards, with quality control backed by a national CNAS testing centre |
The Ф32×106 mm rod is a compact cartridge, so it suits equipment where space inside the filter housing is limited. Typical installations include the pre-carbon stage of household reverse osmosis systems, where it protects the RO membrane from chlorine and sediment; the post-carbon stage, where it polishes taste before the tap; direct-drinking water dispensers; built-in water filters in side-by-side refrigerators; and the inlet filtration of commercial coffee machines, where chlorine and hardness affect both flavour and scale build-up in the boiler.
Because the block combines carbon adsorption with ion exchange, it is also relevant to shower filters and other point-of-use water lines where chlorine and hardness are the main concerns. The standard size list covers outer diameters from Ф32 to Ф62 mm and lengths from 57 to 240 mm, so a buyer can often match an existing housing without a new tool, or specify a custom rod when the housing is proprietary.
To quote a custom sintered carbon rod accurately, Ranveth needs the following details. Please send them together so the engineering team can confirm feasibility and tooling in one pass.
If you do not have a drawing, a sample of the current cartridge and a short description of the housing are enough to start. Ranveth can also propose a standard size from the list above when the application allows.
The first reason is test backing. Ranveth operates its own laboratory accredited by CNAS, the China National Accreditation Service for Conformity Assessment. That laboratory can issue test reports on filtration efficiency, dust holding capacity and resistance, so the media pairing in each carbon rod is supported by measured data rather than catalogue claims alone.
The second is production scale and cleanliness. The manufacturing base covers 50,000 m², and within it six cleanrooms total 20,000 m². For a drinking-water cartridge, that controlled environment limits particle and microbial contamination during production.
Quality systems are the third point. Ranveth holds IATF 16949, the automotive quality management standard, obtained in 2024, together with ISO 9001, ISO 14001 and ISO 45001. Products also meet REACH and RoHS environmental requirements, and compliance documents can be supplied.
Finally, the company has more than 20 years of filter development and manufacturing experience and has exported to Europe, the United States, Japan and Korea for over 20 years. OEM/ODM support covers dimensions, structure, media grade, end-cap and frame material, logo and packaging, with more than 1,000 filter solutions developed to date. The address is Zhongshan, Guangdong, China.
If you are evaluating a sintered carbon rod for a new appliance or a replacement programme, the next step is a short technical exchange. Tell us the device model, the size or drawing, the water flow or airflow, the operating conditions and the quantity you expect. We will reply with a suitable standard size or a custom proposal, sample arrangements and a quotation. You can reach the team through the contact page.
The rod combines high-iodine coconut shell activated carbon with food-grade ion exchange resin in a single sintered block. The carbon adsorbs residual chlorine, off-flavours and organic matter, while the resin helps soften the water and capture heavy metals such as lead and mercury. Because both media sit in the same matrix, water passes them in one short path.
The sintered block has a uniform micro pore structure that gives a high initial flow rate at low resistance. A denser carbon mass raises adsorption capacity and particle retention, while the open pore network keeps pressure drop suitable for low-pressure appliances. The balance is set during moulding, so the rod can be tuned to the device.
Yes. Ranveth supports OEM/ODM customisation of outer diameter, inner diameter, length and the inner-to-outer diameter ratio, and end-cap welding is available. Standard sizes range from Ф32 to Ф62 mm in outer diameter and 57 to 240 mm in length, including the Ф32×106 mm size. Send a drawing or a sample of your current cartridge to start.
For standard sintered carbon rods the MOQ is typically 1,000 to 2,000 pieces, depending on size and packaging; custom sizes are recommended from 5,000 pieces. Standard items ship in about 7 to 15 days, while OEM production runs usually take 25 to 35 days. The factory is in Zhongshan, Guangdong, and schedules can be arranged for long-term customers.
Yes. For a standard size such as Ф32×106 mm, Ranveth can usually provide 3 to 5 free samples, with the buyer covering international courier cost. Custom samples may carry a development fee that is credited against a bulk order. Samples can be accompanied by test data from the CNAS-accredited laboratory.
Under typical inlet water quality and rated flow, the service life is about 6 to 12 months, depending on water quality and daily consumption. The block has a large saturated adsorption capacity, but replacement should be brought forward if flow drops noticeably or taste returns. For OEM programmes, we can agree a replacement interval based on your appliance and local water conditions.
No. The sintering process binds the carbon and resin into a rigid rod with a uniform pore structure, so the filter does not shed black powder downstream. This is one reason the cartridge is used before RO membranes and in direct-drinking dispensers. Fines are held in the matrix rather than carried into the water line.
Please send the device or vehicle model, a size or drawing, the water flow or airflow requirement, the operating conditions such as pressure and temperature, and the quantity. End-cap, connection and packaging requirements are also helpful. With those details, Ranveth can confirm feasibility, propose a sample and provide a quotation through the contact page.